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Symmetrical level schemes of the even-even Sm-A approximate to(130) and Yb-A(approximate to)160 nuclei up to 10(+) in the yrast bands
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Saygi , Bahadir
Konu :
Pseudo-mirror nuclei, Reduced transition probabilities, Level schemes
Yıl :
2018
Nuclear Physics A
Yayıncı Web Sitesi
Kaydet
For the first time, we show here that three isotopes of the Sm isotopic chain almost overlay with three isotopes of the Yb isotopic chain in terms of experimental observables within the N pi N nu scheme. A recent systematic work by Saygi on reduced transitional probabilities in pseudo-mirror nuclei revealed that nuclei having particle-hole symmetry tend to manifest alike experimental structures. The N pi N nu quantity is an indicator of the symmetry and depends on valence nucleon (or holes) number from the nearest closed shell by considering the subshell closures, which simplifies the systematics of excitation energies and related B(E2; L+ -> (L - 2)(+)) values of excited states in nuclei placed in the different mass regions of nu- clear chart. In the light of available data, the experimental observables in the group of Sm-136-Yb-160, Sm-134-Yb-162 and Sm-132-Yb-164 nuclei have been analyzed in a vertical and horizontal perspectives and the ratio of reduced transition probabilities of the first excited states compared with existing theoretical predictions. The data brought to light that the structure of each group reflects identical yrast bands up to 10(+). (C) 2018 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Pseudo-mirror nuclei, Reduced transition probabilities, Level schemes, article
Cilt: 980
ISSN: 0375-9474
Sınıflandırma :
2
Structure of the N=50 As, Ge, Ga nuclei
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
NUCLEAR PHYSICS A
Yazar(lar) :
E. Sahin , G. de Angelis , G. Duchene , T. Faul , A. Gadea , A. F. Lisetskiy , D. Ackermann , A. Algora , S. Aydin , F. Azaiez , D. Bazzacco , G. Benzoni , M. Bostan , T. Byrski , I. Celikovic , R. Chapman , L. Corradi , S. Courtin , D. Curien , U. Datta Pramanik , F. Didierjean , O. Dorvaux , Mustafa Nizamettin Erduran , S. Erturk , E. Farnea , E. Fioretto , G. de France , S. Franchoo , B. Gall , A. Gottardo , B. Guiot , F. Haas , F. Ibrahim , E. Ince , A. Khouaja , A. Kusoglu , G. La Rana , M. Labiche , D. Lebhertz , S. Lenzi , S. Leoni , S. Lunardi , P. Mason , D. Mengoni , C. Michelagnoli , V. Modamio , G. Montagnoli , D. Montanari , R. Moro , B. Mouginot , D. R. Napoli , D. O'Donnell , J. R. B. Oliveira , J. Ollier , R. Orlandi , G. Pollarolo , F. Recchia , J. Robin , M. -D. Salsac , F. Scarlassara , R. P. Singh , R. Silvestri , J. F. Smith , I. Stefan , A. M. Stefanini , K. Subotic , S. Szilner , D. Tonev , D. A. Torres , M. Trotta , P. Ujic , C. Ur , J. J. Valiente-Dobon , D. Verney , M. Yalcinkaya , P. T. Wady , K. T. Wiedemann , K. Zuber
Konu :
NUCLEAR REACTIONS U-238(Se-82, Ga-81), (Se-82, Ge-82), (Se-82, As-83), E=515 MeV, measured E gamma, I gamma (theta), gamma gamma-coin, reaction fragments, (fragment)gamma-coin, PRISMA magnetic spectrometer, gamma after deexcitation, Ge Compton-suppressed detectors of CLARA array, thin, thick target, deduced sigma(theta), levels, J, pi calculated levels, J, pi using shell model
Yıl :
2012
NUCLEAR PHYSICS A
Yayıncı Web Sitesi Tam Metin
Kaydet
The level structures of the N = 50 As-83, Ge-82, and Ga-81 isotones have been investigated by means of multi-nucleon transfer reactions. A first experiment was performed with the CLARA PRISMA setup to identify these nuclei. A second experiment was carried out with the GASP array in order to deduce the gamma-ray coincidence information. The results obtained on the high-spin states of such nuclei are used to test the stability of the N = 50 shell closure in the region of Ni-78 (Z = 28). The comparison of the experimental level schemes with the shell-model calculations yields an N = 50 energy gap value of 4.7(3) MeV at Z = 28. This value, in a good agreement with the prediction of the finite-range liquid-drop model as well as with the recent large-scale shell model calculations, does not support a weakening of the N = 50 shell gap down to Z = 28. (c) 2012 Elsevier B.V. All rights reserved.
DOI : 10.1016/j.nuclphysa.2012.08.007
Anahtar Kelimeler : NUCLEAR REACTIONS U-238(Se-82, Ga-81), (Se-82, Ge-82), (Se-82, As-83), E=515 MeV, measured E gamma, I gamma (theta), gamma gamma-coin, reaction fragments, (fragment)gamma-coin, PRISMA magnetic spectrometer, gamma after deexcitation, Ge Compton-suppressed detectors of CLARA array, thin and thick target, deduced sigma(theta), levels, J, pi calculated levels, J, pi using shell model, article
Cilt: 893
ISSN: 0375-9474
Sınıflandırma :
3
Nuclear structure properties and stellar weak rates for Se-76: Unblocking of the Gamow Teller strength
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Jameel-Un Nabi , Mavra Ishfaq , Mahmut Boyukata , Muhammad Riaz
Konu :
Gamow-Teller transitions, pn-QRPA model, IBM model, Nuclear structure, Electron capture, beta-Delayed neutron emissions
Yıl :
2017
Nuclear Physics A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
At finite temperatures (>= 10(7)K), Se-76 is abundant in the core of massive stars and electron capture on Se-76 has a consequential role to play in the dynamics of core-collapse. The present work may be classified into two main categories. In the first phase we study the nuclear structure properties of Se-76 using the interacting boson model-1 (IBM-1). The IBM-1 investigations include the energy levels, B (E2) values and the prediction of the geometry. We performed the extended consistent-Q formalism (ECQF) calculation and later the triaxial formalism calculation (constructed by adding the cubic term to the ECQF). The geometry of Se-76 can be envisioned within the formalism of the potential energy surface based on the classical limit of IBM-1 model. In the second phase, we reconfirm the unblocking of the Gamow Teller (GT) strength in Se-76 (a test case for nuclei having N > 40 and Z < 40). Using the deformed pn-QRPA model we calculate GT transitions, stellar electron capture cross section (within the limit of low momentum transfer) and stellar weak rates for Se-76. The distinguishing feature of our calculation is a state-by-state evaluation of stellar weak rates in a fully microscopic fashion. Results are compared with experimental data and previous calculations. The calculated GT distribution fulfills the Ikeda sum rule. Rates for, beta-delayed neutrons and emission probabilities are also calculated. Our study suggests that at high stellar temperatures and low densities, the beta(+)-decay on Se-76 should not be neglected and needs to be taken into consideration along with electron capture rates for simulation of presupernova evolution of massive stars. (C) 2017 Elsevier B.V. All rights reserved.
DOI : 10.1016/j.nuclphysa.2017.05.091
Anahtar Kelimeler : Gamow-Teller transitions, pn-QRPA model, IBM model, Nuclear structure, Electron capture, beta-Delayed neutron emissions, article
Cilt: 966
ISSN: 0375-9474
4
beta-Decay half-lives and nuclear structure of exotic proton-rich waiting point nuclei under rp-process conditions
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Jameel-Un Nabi , Mahmut Boyukata
Konu :
Waiting point nuclei, rp-process, Gamow-Teller strength distribution, Electron capture, IBM, pn-QRPA
Yıl :
2016
Nuclear Physics A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
We investigate even even nuclei in the A similar to 70 mass region within the framework of the proton neutron quasi-particle random phase approximation (pn-QRPA) and the interacting boson model-1 (IBM-1). Our work includes calculation of the energy spectra and the potential energy surfaces V (beta, gamma) of Zn, Ge, Se, Kr and Sr nuclei with the same proton and neutron number, N = Z. The parametrization of the IBM-1 Hamiltonian was performed for the calculation of the energy levels in the ground state bands. Geometric shape of the nuclei was predicted by plotting the potential energy surfaces v(beta, gamma) obtained from the IBM-1 Hamiltonian in the classical limit. The pn-QRPA model was later used to compute half-lives of the neutron-deficient nuclei which were found to be in very good agreement with the measured ones. The pn-QRPA model was also used to calculate the Gamow-Teller strength distributions and was found to be in decent agreement with the measured data. We further calculate the electron capture and positron decay rates for these N = Z waiting point (WP) nuclei in the stellar environment employing the pn-QRPA model. For the rp-process conditions, our total weak rates are within a factor two compared with the Skyrme HF + BCS + QRPA calculation. All calculated electron capture rates are comparable to the competing positron decay rates under rp-process conditions. Our study confirms the finding that electron capture rates form an integral part of the weak rates under rp-process conditions and should not be neglected in the nuclear network calculations. (C) 2016 Elsevier B.V. All rights reserved.
DOI : 10.1016/j.nuclphysa.2016.01.003
Anahtar Kelimeler : Waiting point nuclei, rp-process, Gamow-Teller strength distribution, Electron capture, IBM, pn-QRPA, article
Cilt: 947
ISSN: 0375-9474
Sınıflandırma :
5
Evidence for light-by-light scattering in ultraperipheral PbPb collisions at √sNN = 5.02 TeV
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
D. d'Enterria , A. M. Sirunyan , Bora Işıldak
Konu :
Light-by-light scattering, Heavy ions, Ultraperipheral collisions, CMS, LHC
Yıl :
2019
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
Evidence for light-by-light (LbL) scattering, gamma gamma -> gamma gamma, in ultraperipheral PbPb collisions at a nucleon-nucleon center of-mass energy of 5.02 TeV is reported. LbL scattering processes are selected in events with just two photons produced, with transverse energy E-T(gamma) > 2 GeV, pseudorapidity vertical bar eta(gamma)vertical bar < 2.4; and diphoton invariant mass m(gamma gamma) > 5 GeV, transverse momentum p(T)(gamma gamma) < 1 GeV, and acoplanarity (1 - Delta phi(gamma gamma)/pi) < 0.01. After all selection criteria, 14 events are observed, compared to 11.1 +/- 1.1 (theo) and 3.8 +/- 1.3 (stat) events expected for signal and background processes respectively. The significance of the signal excess over the background-only hypothesis is 4.10 sigma. The measured fiducial LbL scattering cross section, sigma(fid)(gamma gamma -> gamma gamma) = 122 +/- 46 (stat) +/- 29 (syst) +/- 4 (theo) nb is consistent with the standard model prediction.
Anahtar Kelimeler : Article

ISSN: 0375-9474
6
Beyond nPDFs effects: prompt J/ψ and ψ(2S) production in pPb and pp collisions
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
G. Oh , A. M. Sirunyan , Bora Işıldak
Konu :
Quarkonia, Charmonia, Prompt Jψ, Prompt ψ(2S), Production
Yıl :
2019
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
A multi-dimensional analysis of prompt charmonia in pp and pPb collisions at root s(NN) = 5.02 TeV with the CMS detector is presented. The pPb differential cross-sections of prompt J/psi are shown in a wide kinematic region, for transverse momentum p(T) spanning from 2 to 30 GeV/c and a rapidity interval between -2.4 to 1.93 in the center of mass of the collision. The final results on prompt psi/(2S) meson production cross section in pp and pPb collisions at 5.02 TeV are also reported as a function of p(T) and rapidity, for p(T) from 4 to 30 GeV/c. The nuclear modification factor is found to be smaller than that of prompt J/psi in all measured bins, especially at low p(T) and at backward rapidity. Such a different behaviour between the ground and excited states cannot be reproduced considering nPDF effects alone.
Anahtar Kelimeler : Article

ISSN: 0375-9474
Sınıflandırma :
7
Multiparticle correlations and higher order harmonics in pPb collisions at √sNN = 8.16 TeV
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Q. Wang , A. M. Sirunyan , Bora Işıldak
Konu :
CMS, Heavy ion, Cumulant, Flow, Collectivity, Small system, Quark-gluon plasma
Yıl :
2019
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The elliptic and higher-order azimuthal anisotropy Fourier harmonics (v(n)) are obtained for pPb collisions at root s(NN) = 8.16 TeV over a wide range of event multiplicities based on multiparticle correlations. The data were collected by the CMS experiment during the 2016 LHC run. A sample of peripheral PbPb collisions at root s(NN) = 5.02 TeV covering a similar range of event multiplicities to the pPb results is also analyzed for comparison. The ratios of different harmonic moments are obtained for both v(2) and v(3) with high precision, which allows a direct comparison to theoretical predictions assuming a hydrodynamic evolution of the created medium with initial-state density fluctuations, particularly probing the non-Gaussian nature of initial-state fluctuations in small collision systems. The presented results provide crucial insights into the origin of collective long-range correlations observed in small collision systems.
Anahtar Kelimeler : Article

ISSN: 0375-9474
Sınıflandırma :
8
Scalar and vector self-energies of heavy baryons in nuclear medium
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
K. Azizi , N. Er , H. Sundu
Konu :
Nuclear matter, Heavy hadrons, Mass, Residue, Scalar, vector self-energies
Yıl :
2017
Nuclear Physics A
Yayıncı Web Sitesi
Kaydet
The in-medium sum rules are employed to calculate the shifts in the mass and residue as well as the scalar and vector self-energies of the heavy Lambda(Q), Sigma(Q) and Xi(Q) baryons, with Q being b or c quark. The maximum shift in mass due to nuclear matter belongs to the Sigma(c) baryon and it is found to be Delta m Sigma(c) = -936 MeV. In the case of residue, it is obtained that the residue of Sigma(b) baryon is maximally affected by the nuclear medium with the shift Delta lambda Sigma(b) = -0.014 GeV3. The scalar and vector self-energies are found to be Sigma(S)(Lambda b)= 653 MeV, Sigma(S)(Lambda b) = -614 MeV, Sigma(S)(Xi b) = -17 MeV, Sigma(S)(Lambda c)., = 272 MeV, Sigma(S)(Sigma c) = -936 MeV, Sigma(S)(Xi c) = -5 MeV and Sigma(nu)(Lambda c) = 436 +/- 148 MeV, Sigma(nu)(Sigma c) = 382 +/- 129 MeV, Sigma(nu)(Xi c) =15 +/- 5 MeV, Sigma(nu)(Lambda c) =151 +/- 45 MeV, Sigma(nu)(Sigma c)= 486 +/- 144 MeV and Sigma(nu)(Xi c) = 1.391 +/- 0.529 MeV. (C) 2017 The Author(s). Pcublished by Elsevier B.V.
Anahtar Kelimeler : Nuclear matter, Heavy hadrons, Mass, Residue, Scalar and vector self-energies, article
Cilt: 960
ISSN: 0375-9474
Sınıflandırma :
9
Proton radiative capture cross sections on Pd-102 at energies of astrophysical interest
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
NUCLEAR PHYSICS A
Yazar(lar) :
RT Guray , Latife Sahin , J Goerres , M Howard , MC Wiescher , N Ozkan , AS Murphy , RN Boyd , AL Cole , R DeHaan , M Famiano
Konu :
Fizik, Temel Bilimler, Temel Bilimler (SCI), FİZİK, NÜKLEER
Yıl :
2021
NUCLEAR PHYSICS A
Yayıncı Web Sitesi
Kaydet
In order to provide a test of the statistical models used in the study of the p-process, we have made measurements of the cross section for the Pd-102(p,gamma)Ag-103 reaction in a range of energies appropriate for the explosive environments leading to the rp- and gamma -subprocesses.
Anahtar Kelimeler : Fizik, Temel Bilimler, Temel Bilimler (SCI), FİZİK, NÜKLEER, Makale

ISSN: 0375-9474
Sınıflandırma :
10
New limits for the F-18(p,alpha)O-15 rate in Novae
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
NUCLEAR PHYSICS A
Yazar(lar) :
AE Champagne , RL Kozub , DW Bardayan , JC Batchelder , JC Blackmon , CR Brune , JA Cizewski , T Davinson , U Greife , CJ Gross , CC Jewett , RJ Livesay , Z Ma , BH Moazen , CD Nesaraja , JP Scott , D Shapira , MS Smith , JS Thomas , PJ Woods , Latife Sahin
Konu :
Temel Bilimler, FİZİK, NÜKLEER, Fizik, Temel Bilimler (SCI)
Yıl :
2021
NUCLEAR PHYSICS A
Yayıncı Web Sitesi
Kaydet
The degree to which the (p, gamma) and (p, alpha) reactions destroy F-18 at temperatures similar to 14x10(8) K is important for understanding the synthesis of nuclei in nova explosions and for using the long-lived radionuclide F-18, a target of gamma ray astronomy, as a diagnostic of nova mechanisms. The reactions are dominated by low-lying proton resonances near the F-18+p threshold (E-x=6.411 MeV in Ne-19). To gain further information about these resonances, we have used the d (F-18,p)F-19 neutron transfer reaction to selectively populate corresponding mirror states in F-19. The results would suggest F-18(p, gamma)Ne-19 and F-18(p, alpha)O-15 reaction rates that are 2-3 times lower than reported previously.
Anahtar Kelimeler : Temel Bilimler, FİZİK, NÜKLEER, Fizik, Temel Bilimler (SCI), Makale

ISSN: 0375-9474
Sınıflandırma :
Enerji %72
Enerji %84
11
Odd mass nuclei in the mass regions 100 <= A <= 130 from a vertical perspective within the NpNn scheme
Dergi Makalesi

Dergi Makalesi
Kaynak 1:
DSpace Makaleler
Kaynak 2:
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Saygi , Bahadir
Konu :
Pseudo-mirror nuclei, Odd-even nuclei, Even-odd nuclei, Level schemes, n-p interaction, N-p N-n scheme
Yıl :
2019
Nuclear Physics A
Kaydet
We present here the symmetrical level schemes of odd mass pseudo-mirror nuclei for the first time within NpNn scheme. Pseudo-mirror nuclei having particle-hole symmetry are to reflect similar experimental structures, where the NpNn quantity is an indicator of the pronounced symmetry. In the light of available data, the Cs-125-Rh-107, (123)cs-Rh-109, La-127-Tc-105, Ce-127-Mo-105, Ba-123-Ru-109 and Nd-131-Zr-101 nuclei have been analyzed in a vertical perspective with in the pseudo-mirror nuclei framework. The analysis of level schemes of the nuclei of interest revealed that almost degenerate quadrupole electric transitions from equal spin-parity states in even-odd and odd-even pseudo-mirror nuclei. (C) 2018 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Pseudo-mirror nuclei, Odd-even nuclei, Even-odd nuclei, Level schemes, n-p interaction, N-p N-n scheme, article
Cilt: 983
ISSN: 0375-9474
12
Symmetrical level schemes of the even–even SmA?130 and YbA?160 nuclei up to 10+ in the yrast bands
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Sayğı B.
Konu :
Level schemes, Pseudo-mirror nuclei, Reduced transition probabilities
Yıl :
2018
Nuclear Physics A
Yayıncı Web Sitesi
Kaydet
For the first time, we show here that three isotopes of the Sm isotopic chain almost overlay with three isotopes of the Yb isotopic chain in terms of experimental observables within the N?N? scheme. A recent systematic work by Sayğı on reduced transitional probabilities in pseudo-mirror nuclei revealed that nuclei having particle–hole symmetry tend to manifest alike experimental structures. The N?N? quantity is an indicator of the symmetry and depends on valence nucleon (or holes) number from the nearest closed shell by considering the subshell closures, which simplifies the systematics of excitation energies and related B(E2; L+›(L-2)+) values of excited states in nuclei placed in the different mass regions of nuclear chart. In the light of available data, the experimental observables in the group of 136Sm–160Yb, 134Sm–162Yb and 132Sm–164Yb nuclei have been analyzed in a vertical and horizontal perspectives and the ratio of reduced transition probabilities of the first excited states compared with existing theoretical predictions. The data brought to light that the structure of each group reflects identical yrast bands up to 10+. © 2018 Elsevier B.V.
Anahtar Kelimeler : Level schemes, Pseudo-mirror nuclei, Reduced transition probabilities, article
Cilt: 980
ISSN: 0375-9474
Sınıflandırma :
13
2000'li Yıllarda Sosyal Politika Trendleri: Degisim ve Reform Gündemi
Kitap Bölümü

Kitap Bölümü
Kaynak :
DSpace Makaleler
Yayıncı :
NUCLEAR PHYSICS A
Yazar(lar) :
Tekin AKGEYİK
Konu :
Sosyal ve Beşeri Bilimler, İşletme, Ekonomi ve İş, Sosyal Bilimler (SOC)
Yıl :
2021
NUCLEAR PHYSICS A
Yayıncı Web Sitesi
Kaydet
Anahtar Kelimeler : Sosyal ve Beşeri Bilimler, İşletme, Ekonomi ve İş, Sosyal Bilimler (SOC), Kitapta Bölüm
Sınıflandırma :
14
Systematics of the pygmy dipole resonance in stable tin isotopes from resonant photon scattering
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Özel B. , Enders J. , von Neumann-Cosel P. , Poltoratska I. , Richter A. , Savran D. , Volz S.
Yıl :
2007
Nuclear Physics A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
The 112,120Sn(?, ?) reactions were studied for different endpoint energies of the incident bremsstrahlung spectrum below the neutron separation energies at the superconducting Darmstadt electron linear accelerator S-DALINAC. Dipole transition strength distributions have been extracted for 112Sn; the analysis of 120Sn is still in progress. In the case of 112Sn a concentration of dipole excitations is observed between 5 and 8 MeV. Combining with existing data for 116,124Sn provides a systematics of the pygmy dipole resonance (PDR) in stable Sn nuclei which serves as a benchmark test of recent microscopic calculations aiming at a description of the PDR in exotic neutron-rich Sn isotopes. © 2007 Elsevier B.V. All rights reserved.
DOI : 10.1016/j.nuclphysa.2007.01.069
Anahtar Kelimeler : article
Cilt: 788
Sayı: 01.Apr
ISSN: 0375-9474
Sınıflandırma :
15
CMS Collaboration
Konferans Makalesi

Konferans Makalesi
Kaynak 1:
DSpace Makaleler
Kaynak 2:
DSpace Makaleler
Kaynak 3:
DSpace Makaleler
Kaynak 4:
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Physics Collaboration
Yıl :
2019
Nuclear Physics A
Kaydet
[No abstract available]
DOI : 10.1016/S0375-9474(18)30500-1
Anahtar Kelimeler : conferenceObject
Cilt: 982
ISSN: 0375-9474
16
Nuclear structure properties of even-even chromium isotopes and the effect of deformation on calculated electron capture cross sections
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
NUCLEAR PHYSICS A
Yazar(lar) :
Jameel-Un Nabi , Mahmut Boyukata , Asim Ullah , Muhammad Riaz
Konu :
Chromium isotopes, Deformation parameter, Electron capture cross sections, IBM-1 model, Nuclear structure, pn-QRPA model
Yıl :
2020
NUCLEAR PHYSICS A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
In this study, we investigate the role of the nuclear deformation on the calculated electron capture cross section (ECC) of even-even chromium (Cr) isotopes. We first determined the nuclear structure properties of these nuclei within the interacting boson model-1 (IBM-1). The energy spectra and E2 transition probabilities were calculated by fitting the parameters in the model formalism. The analysis of the potential energy surface were also performed to predict the geometric shape of the Cr nuclei by plotting their contour plot in the plane of (beta, gamma ) deformation parameters. Later, we calculated the ECC within the proton-neutron quasiparticle random phase approximation (pn-QRPA) model. In particular we studied how the calculated ECC changed with different values of nuclear deformation parameter. The calculated Gamow-Teller (GT) strength distributions were widely spread among the daughter states. The total GT strength decreased with increasing value of the beta parameter. The computed ECC values, however, increased with increase in the beta value of the Cr isotopes. (c) 2020 Elsevier B.V. All rights reserved.
DOI : 10.1016/j.nuclphysa.2020.121985
Anahtar Kelimeler : Chromium isotopes, Deformation parameter, Electron capture cross sections, IBM-1 model, Nuclear structure, pn-QRPA model, article
Cilt: 1002
ISSN: 0375-9474
Sınıflandırma :
17
Pseudoscalar-meson octet-baryon coupling constants from two-flavor lattice QCD
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
T. T. Takahashi , Güray Erkol , M. Oka
Konu :
Meson-baryon coupling constant, Hyperon axial charge, Lattice QCD
Yıl :
2010
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
We evaluate the pseudoscalar-meson octet-baryon coupling constants and the corresponding axial charges in eight channels (πNN, πΣΣ, πΛΣ, KΛN, KΣN, πΞΞ, KΛΞ and KΣΞ) in lattice QCD with two flavors of dynamical quarks. The parameter α≡F/(F+D) representing the SU(3)-flavor symmetry is computed at each u,d-quark hopping parameter and at the flavor-SU(3) symmetric point where the three quark flavors are degenerate at the physical s-quark mass. In particular, we obtain α=0.395(6) at the SU(3) symmetric limit. The quark-mass dependences of the coupling constants are obtained by changing the u- and the d-quark masses and we find that the SU(3)-flavor symmetry is broken by only a few percent at each quark-mass we employ.
Anahtar Kelimeler : Article
Sınıflandırma :
18
Search for the chiral magnetic effect at the LHC with the CMS experiment
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak 1:
DSpace Makaleler
Kaynak 2:
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Z. Tu , A. M. Sirunyan , Bora Işıldak
Konu :
CME, Small system, Particle correlation, Event shape engineering
Yıl :
2019
Nuclear Physics A
Tam Metin
Kaydet
Searches for the chiral magnetic effect (CME) using charge-dependent azimuthal correlations with respect to event planes are presented in PbPb collisions at 5.02 TeV and pPb collisions at 5.02 and 8.16 TeV, with the CMS experiment at the LHC. The azimuthal correlations with respect to the second- and third-order event planes are explored as a function of pseudorapidity, transverse momentum, and event multiplicity, which provides new insights into the underlying background correlations. By employing an event-shape engineering technique, a linear dependence of charge-dependent correlations on the second-order anisotropy flow (nu(2)) is observed, and the upper limits on the nu(2)-independent fraction, which is directly related to the CME signal, are obtained at 95% confidence level for both pPb and PbPb collisions. These results provide strong constraints on the search for the chiral magnetic effect at LHC energies, and establish new guidelines for searches in future experiments.
Anahtar Kelimeler : Article

ISSN: 0375-9474
Sınıflandırma :
19
Investigations of instabilities in nuclear matter in stochastic relativistic models
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
S. Ayik , O. Yilmaz , F. Acar , B. Danisman , N. Er , A. Gokalp
Konu :
Spinodal instability, Stochastic mean-field
Yıl :
2011
Nuclear Physics A
Yayıncı Web Sitesi
Kaydet
The spinodal instabilities for symmetric nuclear matter at finite temperature are studied within different relativistic mean-field models in the semi-classical approximation and the relativistic results are compared with Skyrme type non-relativistic calculations. Qualitatively similar results appear in the unstable response of the system in both non-relativistic and relativistic descriptions. Furthermore, the early growth of baryon, scalar and current density correlation functions are calculated for hot symmetric nuclear matter. (C) 2011 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Spinodal instability, Stochastic mean-field, article
Cilt: 859
Sayı: 1
ISSN: 0375-9474
Sınıflandırma :
Fizik %100
20
Properties of Sigma(Q)*, Xi(Q)* and Omega(Q)* heavy baryons in cold nuclear matter
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
K. Azizi , N. Er
Konu :
Heavy baryons, Cold nuclear matter
Yıl :
2018
Nuclear Physics A
Yayıncı Web Sitesi
Kaydet
The in-medium properties of the heavy spin-3/2 Sigma(Q)*, Xi(Q)*, and Omega(Q)*, baryons with Q being b or c quark are investigated. The shifts in some spectroscopic parameters of these particles due to the saturated cold nuclear matter are calculated. The variations of those parameters with respect to the changes in the density of the cold nuclear medium are studied, as well. It is observed that the parameters of Sigma(Q)* baryons are considerably affected by the nuclear matter compared to the Xi(Q)* and Omega(Q)* particles that roughly do not see the medium. The results obtained may be used in analyses of the data tole provided by the in -medium experiments like PANDA. (C) 2018 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Heavy baryons, Cold nuclear matter, article
Cilt: 970
ISSN: 0375-9474
Sınıflandırma :
21
Insights into the low energy incomplete fusion
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Rudra N. Sahoo , Malika Kaushik , Pawan S.Ashok Kumar , Arshiya Sood , Vijay Raj Sharma , Abhishek Yadav , Pushpendera P. Singh , Sezgin Aydın
Konu :
Activation Technique, Complete Fusion, Excitation Functions, Incomplete Fusion, Low Energy Heavy-ion Reactions, Off-line ?-spectroscopy
Yıl :
2019
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
In the present work, channel-by-channel excitation functions of different evaporation residues populated via complete and/or incomplete fusion in C12+169Tm system have been measured for an energy range Elab?53–90MeV, using recoil-catcher activation technique followed by off-line ?-spectroscopy. Experimentally measured excitation functions have been analysed in the framework of statistical model code PACE. To probe the effect of entrance-channel parameters on the onset and strength of incomplete fusion, relative contributions of complete and incomplete fusion have been deduced from the analysis of experimentally measured excitation functions. The percentage fraction of incomplete fusion deduced from the analysis of excitation functions has been studied in terms of incident energy, entrance-channel mass-asymmetry, ground state alpha-Q-value, neutron skin thickness of target nuclei, and nuclear potential parameters. It has been found that incomplete fusion start competing with complete fusion even at slightly above barrier energies where complete fusion is assumed to the sole contributor. The probability of incomplete fusion increases with incident energy, entrance channel mass-asymmetry, large negative ground state alpha-Q-value, neutron skin thickness, and nuclear potential parameters for individual projectiles.
Anahtar Kelimeler : Activation Technique, Complete Fusion, Excitation Functions, Incomplete Fusion, Low Energy Heavy-ion Reactions, Off-line ?-spectroscopy, article
Cilt: 983
ISSN: 3759474
Sınıflandırma :
22
D0-meson RAA in PbPb collisions at √sNN = 5.02 TeV and elliptic flow in pPb collisions at √sNN = 8.16 TeV with CMS
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Z. Shi , A. M. Sirunyan , Bora Işıldak
Konu :
Heavy flavor, Nuclear modification factor, Energy loss mechanism, Elliptic flow, Small systems
Yıl :
2019
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The study of charm production in heavy-ion collisions is considered an excellent probe for the properties of the hot and dense medium created in heavy-ion collisions. Measurements of D-0-meson nuclear modification factor can provide strong constraints into the mechanisms of in-medium energy loss and charm flow in the medium. The measurement of D-0-meson elliptic flow in pPb collisions helps us understand the strength of charm quarks coupling to significantly reduced systems which demonstrate hydrodynamic properties. In this paper, the measurements of the D-0-meson nuclear modification factor in PbPb collisions at 5.02 TeV together with the new measurement of D-0-meson elliptic flow in high multiplicity pPb collisions at 5.02 TeV using the two-particle correlation method will be presented.
Anahtar Kelimeler : Article

ISSN: 0375-9474
Sınıflandırma :
23
Beyond nPDFs effects : Prompt J/psi and psi(2S) production in pPb and pp collisions
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Karamanoğlu Mehmetbey Üniversitesi
Konu :
Quarkonia, Charmonia, Prompt Jpsi, Prompt psi(2S), Production
Yıl :
2019
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
A multi-dimensional analysis of prompt charmonia in pp and pPb collisions at root s(NN) = 5.02 TeV with the CMS detector is presented. The pPb differential cross-sections of prompt J/psi are shown in a wide kinematic region, for transverse momentum p(T) spanning from 2 to 30 GeV/c and a rapidity interval between -2.4 to 1.93 in the center of mass of the collision. The final results on prompt psi/(2S) meson production cross section in pp and pPb collisions at 5.02 TeV are also reported as a function of p(T) and rapidity, for p(T) from 4 to 30 GeV/c. The nuclear modification factor is found to be smaller than that of prompt J/psi in all measured bins, especially at low p(T) and at backward rapidity. Such a different behaviour between the ground and excited states cannot be reproduced considering nPDF effects alone.
Anahtar Kelimeler : Quarkonia, Charmonia, Prompt Jpsi, Prompt psi(2S), Production, article
Cilt: 982
ISSN: 0375-9474
Sınıflandırma :
24
Evidence for light-by-light scattering in ultraperipheral PbPb collisions at root S-NN=5.02 TeV
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Karamanoğlu Mehmetbey Üniversitesi
Konu :
Light-By-Light Scattering, Heavy Ions, Ultraperipheral Collisions, CMS, LHC
Yıl :
2019
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
Evidence for light-by-light (LbL) scattering, gamma gamma -> gamma gamma, in ultraperipheral PbPb collisions at a nucleon-nucleon center of-mass energy of 5.02 TeV is reported. LbL scattering processes are selected in events with just two photons produced, with transverse energy E-T(gamma) > 2 GeV, pseudorapidity vertical bar eta(gamma)vertical bar < 2.4; and diphoton invariant mass m(gamma gamma) > 5 GeV, transverse momentum p(T)(gamma gamma) < 1 GeV, and acoplanarity (1 - Delta phi(gamma gamma)/pi) < 0.01. After all selection criteria, 14 events are observed, compared to 11.1 +/- 1.1 (theo) and 3.8 +/- 1.3 (stat) events expected for signal and background processes respectively. The significance of the signal excess over the background-only hypothesis is 4.10 sigma. The measured fiducial LbL scattering cross section, sigma(fid)(gamma gamma -> gamma gamma) = 122 +/- 46 (stat) +/- 29 (syst) +/- 4 (theo) nb is consistent with the standard model prediction.
Anahtar Kelimeler : Light-By-Light Scattering, Heavy Ions, Ultraperipheral Collisions, CMS, LHC, article
Cilt: 982
ISSN: 0375-9474
25
The HypHI Phase 0 experiment
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
NUCLEAR PHYSICS A
Yazar(lar) :
T. R. Saito , S. Bianchin , O. Borodina , V. Bozkurt , B. Gokuzum , M. Kavatsyuk , T. Aumann
Konu :
hypernuclear spectroscopy, heavy ion induced reaction, invariant mass
Yıl :
2010
NUCLEAR PHYSICS A
Yayıncı Web Sitesi
Kaydet
The HypHI Phase 0 experiment to demonstrate the feasibility of precise hypernuclear spectroscopy with induced reactions of heavy ion beams was performed at GSI in August and October in 2009, with a projectile of Li-6 at 2 A GeV impinged on carbon graphite target with a thickness of 8 g/cm(2). The experiment mainly aims to reconstruct events of H-3(Lambda), H-4(Lambda) and He-5(Lambda) by observing the pi(-) decay channel. Details of the HypHI Phase 0 experiment performed in August in 2009 will be discussed.
Anahtar Kelimeler : hypernuclear spectroscopy, heavy ion induced reaction, invariant mass, article
Cilt: 835
Sayı: 1.Nis
ISSN: 0375-9474
Sınıflandırma :

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