• Piri Keşif Aracı

1.  sayfa ve
1
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 :
2
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 :
3
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
4
In-beam α-, e- and γ-spectroscopy of 215Fr
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
D.J. Decman , H. Grawe , H. Kluge , K.H. Maier , A. Maj , M. Menningen , N. Roy , W. Wiegner
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The nucleus 215Fr was studied using the 208Pb(11B,4n) and 204Hg(15N, 4n) reactions. The measurements included αγ, γγ, and ee coincidence experiments as well as γ-ray and α-particle DPAD studies. The decay scheme gives levels up to a 3068 keV 392− isomer with t12 = 33 ± 5 ns as well as 3 shorter-lived isomers ( t12 ≈ 4 ns); g-factors have been measured for these isomers. The α-particle spectroscopy showed the existence of 4 long-range alphas which could be assigned to excited states in 215Fr. t12(215Frg,s) = 86 ± 5 ns has been remeasured. The negative-parity states up to 1680 keV seem to be members of the π(h92)925v(g92)2 configuration; a strong hindranc M1 transitions is found. The higher-lying states are compared with the DIPM model.
DOI : 10.1016/0375-9474(84)90291-4
Anahtar Kelimeler : Nuclear reactions
Cilt: 419
Sayı: 1
Sayfa: 163-186
ISSN: 0375-9474
5
Investigation of the reactions 58Ni(d, α)56Co and 50Ti(d, α)48Sc with vector and tensor polarized deuterons
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
M. Haller , W. Kretschmer , R.E. Anderson , B.L. Burks , T.B. Clegg , E.J. Ludwig , R.L. Varner , J.F. Wilkerson
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
Angular distributions of the cross section, and vector and tensor analyzing powers have been measured for the 58Ni(d, α)56Co and 50Ti(d, α)48Sc reactions at Ed = 16 MeV. The L- and J-dependence of the vector and tensor analyzing powers allows Jπ assignments for some low-lying states in the final nuclei. Using optical potentials with matching geometry good DWBA descriptions of all observables could be achieved.
DOI : 10.1016/0375-9474(84)90284-7
Anahtar Kelimeler : Nuclear reactions
Cilt: 419
Sayı: 1
Sayfa: 45-60
ISSN: 0375-9474
6
A 10-GeV on 10-GeV heavy-ion collider
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
G.R. Young , J.A. Martin , J.B. Ball
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
DOI : 10.1016/0375-9474(84)90561-X
Cilt: 418
Sayı: 0
Sayfa: 361-369
ISSN: 0375-9474
7
Quark-hadron and chiral transitions and their relation to the early universe
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
David N. Schramm , Keith A. Olive
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
A review is made of the relation of the quark-hadron and chiral symmetry transitions and the big bang universe. Possible signatures at de-confinement are mentioned and related to cosmology. It is noted that to produce surviving perturbations at this epoch requires black hole production which in turn would require a first-order phase transition. The effect of a quark matter phase in neutron stars is also discussed and related to monopole flux limits through its role in cooling.
DOI : 10.1016/0375-9474(84)90554-2
Cilt: 418
Sayı: 0
Sayfa: 289-300
ISSN: 0375-9474
8
Comments on multiparticle production in nucleus-nucleus collisions
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
C. Pajares
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
We discuss the following aspects of the field: similarities and differences of models, definitions of central collisions and correlations between the ratio n/D and the rise of the average transverse momentum with increasing multiplicity.
DOI : 10.1016/0375-9474(84)90580-3
Cilt: 418
Sayı: 0
Sayfa: 613-624
ISSN: 0375-9474
9
Editorial Board
Dergi Makalesi

Dergi Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
DOI : 10.1016/0375-9474(84)90319-1
Cilt: 417
Sayı: 1
Sayfa: iii-0
ISSN: 0375-9474
10
Few body problems in atomic and molecular physics
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
T.K. Lim
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
In this article, I present a short summary and review of recent developments in the application of traditional few-body methods to atomic and molecular physics, proffering selective examples which demonstrate the new insights being obtained in the description of processes occurring in these areas of few-body physics.
DOI : 10.1016/0375-9474(84)90481-0
Cilt: 416
Sayı: 0
Sayfa: 491-502
ISSN: 0375-9474
11
Single-particle magnetic moments in a relativistic shell model
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
A. Bouyssy , S. Marcos , J.F. Mathiot
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
Starting from the original σ + ω model of Walecka, single-particle properties of finite nuclei are derived in the Dirac-Hartree approximation. In such a model, large relativistic corrections are found for the single-particle Dirac magnetic moment, whose origin is found to be closely connected with the effective nucleon mass in nuclei yielding a reasonable value of the spin-orbit splitting. A phenomenological model, which takes into account tensor as well as space-like vector potentials, is found to reduce considerably the amount of relativistic corrections. A possible connection with the Dirac-Hartree-Fock approximation is discussed.
DOI : 10.1016/0375-9474(84)90315-4
Cilt: 415
Sayı: 3
Sayfa: 497-519
ISSN: 0375-9474
12
The distribution of gray particles in lepton-induced reactions
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
N. Suzuki
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The number distribution of gray particles is formulated in the framework of the cascade model under the condition that an incident particle varies its cross section after the first collision with a nucleon inside the nucleus. This formulation is applied to the distribution of gray particles in the charged-current interactions of neutrinos on nuclei. A discussion of the relation between the mean number of gray particles and the time duration in which the produced quark propagates singly inside the nucleus is given.
DOI : 10.1016/0375-9474(84)90613-4
Cilt: 414
Sayı: 3
Sayfa: 465-476
ISSN: 0375-9474
13
Photon scattering from 12C and 208Pb in the Δ-region
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
E. Hayward , B. Ziegler
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The photon-scattering cross sections at 115° for 12C and 208Pb have been measured using bremsstrahlung energies E of 150, 200, 250, 300, 350 and 400 MeV. Scattered photons having energies in the range 0.9E to E were accepted by the detector. The measured cross sections are much larger than the prediction of a simple model relating the scattering cross section at a large angle to the forward-scattering cross section and the form factor for elastic electron scattering. This discrepancy is discussed in terms of collective effects, inelastic scattering, or exchange-current distributions.
DOI : 10.1016/0375-9474(84)90606-7
Anahtar Kelimeler : Nuclear Reactions
Cilt: 414
Sayı: 3
Sayfa: 333-346
ISSN: 0375-9474
14
Residual quasiparticle interaction due to blocking
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
J.Y. Zeng , T.S. Cheng , L. Cheng , C.S. Wu
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The residual quasiparticle interaction due to the blocking effect is analyzed with the particlenumber-conserving (PNC) method for treating the nuclear pairing correlation. The calculation shows that this kind of residual interaction depends sensitively on the distribution of the single-particle levels near the Fermi surface and the location of the blocked levels. If both the blocked levels are above the Fermi surface the residual interaction due to blocking turns out to be small in general. However, if one of the blocked levels is just below the Fermi surface the residual interaction due to blocking may be rather large.
DOI : 10.1016/0375-9474(84)90643-2
Cilt: 414
Sayı: 2
Sayfa: 253-268
ISSN: 0375-9474
15
Hafnium and lutetium isotopes produced in heavy-ion collisions of 7.6 MeV/u 40Ar, 8.5 MeV/u 84Kr and 8.5 MeV/u 136Xe on tungsten targets
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
I. Zychor , K. Rykaczewski , W. Kurcewicz , H. Ahrens , H. Folger , N. Kaffrell , N. Trautmann
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The yields of known hafnium and lutetium isotopes with T12 > 2 min produced in 40Ar + natW, 84Kr + natW, 136Xe + natW and 136Xe + 186W reactions were determined by combining chemical separation procedures with γ-ray spectroscopic measurements. The experimental mass distributions of neutron-deficient hafnium and lutetium isotopes are compared with the predictions of a simple theoretical model. Production of neutron-rich hafnium and lutetium isotopes in heavy-ion collisions is discussed.
DOI : 10.1016/0375-9474(84)90646-8
Anahtar Kelimeler : Nuclear Reactions
Cilt: 414
Sayı: 2
Sayfa: 301-308
ISSN: 0375-9474
16
Magnetic moment of the 72+404 ground state of 10.5 h 175Ta
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
R. Eder , E. Hagn , E. Zech
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The magnetic hyperfine splitting νM = |gμNBHF/h| of 175Ta (Jπ = 72+; T12 = 10.5 h) in Fe has been measured with the technique of nuclear magnetic resonance on oriented nuclei as 320.4(1) MHz. With the known hyperfine field BHF(TaFe) = −648(13)kG the magnetic moment of the 72+[404] ground state of 175Ta is deduced to be ¦μ¦ = 2.27(5)μN.
DOI : 10.1016/0375-9474(84)90374-9
Anahtar Kelimeler : Radioactivity
Cilt: 413
Sayı: 2
Sayfa: 247-254
ISSN: 0375-9474
17
Author index
Dergi Makalesi

Dergi Makalesi
Kaynak 1:
Science Direct
Kaynak 2:
Science Direct
Yayıncı :
Nuclear Physics A
Yıl :
1984
Nuclear Physics A
Tam Metin
Kaydet
DOI : 10.1016/0375-9474(84)90426-3
Cilt: 413
Sayı: 3
Sayfa: 535-536
ISSN: 0375-9474
18
Alpha-decay properties of 247Cf, 248Cf, 252Fm and 254Fm
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Irshad Ahmad , J.L. Lerner
Yıl :
1984
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
Alpha-decay properties of 247Cf, 248Cf, 252Fm and 254Fm were measured using thin massseparated sources. Alpha spectra were measured with Au-Si surface barrier detectors and a magnetic spectrometer, and these were used to determine energies and intensities of α-groups. The energies and intensities are: 6.296 (95 %), 6.238 (5 %) in 247Cf decay; 6.258 (80.0 %), 6.217 (19.6 %), 6.118 (0.4 %) in 248Cf decay; 7.039 (84.0 %), 6.998 (15.0 %), 6.904 (0.97 %), 6.759 (0.023 %) in 252Fm decay; 7.192 (85.0 %), 7.150 (14.2 %), 7.050 (0.82 %), 6.898 (0.0066 %) in 254Fm decay. Gamma-ray spectra of mass-separated 252Fm and 254Fm samples were measured with a high-resolution Ge(Li) spectrometer, and the 2+ → 0+ and 4+ → 2+ transitions were observed in the decays of both nuclei. The half-lives of 247Cf and 252Fm were measured to be 3.11 ± 0.03 h and 25.39 ± 0.04 h, respectively. The α branching ratio α(α + EC) for 247Cf was found to be (3.5±0.5) × 10−2% and the fission/α ratio was measured to be (2.3 ± 0.2) × 10−3% which corresponds to a fission half-life of 125 ± 8 y.
DOI : 10.1016/0375-9474(84)90419-6
Anahtar Kelimeler : Radioactivity
Cilt: 413
Sayı: 3
Sayfa: 423-431
ISSN: 0375-9474
19
Divergence of the quark self-energy in the second quantized chiral bag model
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
E. Oset
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
When summing over the intermediate quark states of a spherical cavity, the quark self-energy of the chiral bag model, in lowest order of the pion coupling, is shown to generate a series of terms, each one growing linearly with the angular variable κ. However, there is a cancellation between terms for different κ, which finally leads to an overall linearly divergent series.
DOI : 10.1016/0375-9474(83)90535-3
Cilt: 411
Sayı: 3
Sayfa: 357-368
ISSN: 0375-9474
20
Nuclear structure effects in sub-barrier fusion cross sections
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
R. Pengo , D. Evers , K.E.G. Löbner , U. Quade , K. Rudolph , S.J. Skorka , I. Weidl
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The total fusion cross sections around and down to ≈ 12 MeV below the Coulomb barrier in the c.m. system have been measured with the Munich heavy-ion recoil spectrometer for 30 projectile-target combinations: 32, 36S + 92, 94, 96, 98, 100Mo, 100, 101, 102, 104Ru, 103Rh, 104, 105, 106, 108, 110Pd, The excitation functions can be reproduced with a one-dimensional barrier penetration model by increasing the nuclear radii by ΔR ⋍ 0.255 ± 0.035 fm and introducing a gaussian distribution of the nuclear radius R with a standard deviation σfit(R). The σfit(R) can be explained as being due to quadrupole vibrational fluctuations of the surface-to-surface distance at the barrier and to two-neutron-transfer reactions with positive Q-values.
DOI : 10.1016/0375-9474(83)90392-5
Anahtar Kelimeler : Nuclear reactions
Cilt: 411
Sayı: 2
Sayfa: 255-274
ISSN: 0375-9474
21
Measurements of fragment mass, charge and kinetic energy distributions in thermal neutron fission of 235U with a back-to-back ΔE-E detector system
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Rekha Govil , S.S. Kapoor , D.M. Nadkarni , S.R.S. Murthy , P.N.Rama Rao
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
A simultaneous measurement of mass (M), charge (Z) and kinetic energy (Ek) distributions of fragments in thermal-neutron fission of 235U has been carried out using a back-to-back ΔE-E detector system. A pair of gridded ionization chambers filled with P-5 gas measured the energy losses ΔE1, ΔE2 of the complementary fragments in the gas, and the residual fragment energies were measured with a pair of semiconductor detectors. The four-parameter data were analysed to obtain fragment Z-distributions using the mass-momentum conservation relations to obtain M and then using the dependence of ΔE on E/M and Z. The charge resolution for the light-fragment group was determined at the gas pressures of 44, 150, 270 Torr and the best Z-resolution was obtained at 270 Torr. The data at this latter gas pressure were analysed to obtain the variances σ2z of the fragment charge distributions for different Ek windows and this was compared with the measured variances σ2A of the fragment mass distribution as a function of Ek as obtained by twoparameter measurements of the correlated fragment energies. The dependence of the measured variances σ2A, σ2Z on Ek is considered with a view to learning about the degree of neutron-proton correlations in the nucleon exchanges taking place during the mass division in fission, in analogy with that used in the case of heavy-ion deep inelastic collisions (DIC). The variation of σ2Aσ2z with Ek observed in the present work, which is somewhat similar to that seen in heavy-ion DIC, implies that the fragment mass division in fission is governed by nucleon-exchange processes, where the degree of neutron-proton correlations is dependent on the total kinetic energy Ek. While for very large Ek the neutron-proton motion in the exchange processes is found to be uncorrelated, for lower Ek values the motion is seen to be correlated. Implications of these results regarding the applicability of fission models such as statistical model are pointed out.
DOI : 10.1016/0375-9474(83)90638-3
Anahtar Kelimeler : Nuclear reactions
Cilt: 410
Sayı: 3
Sayfa: 458-474
ISSN: 0375-9474
22
Shell-model Coulomb energies
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
E. Comay , J. Jänecke
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
Analytical expressions have been derived for the total Coulomb energies, for isoscalar, isovector and isotensor Coulomb energies, and for Coulomb energy differences of nuclei with protons and neutrons in equivalent and in different major shell regions. The approach is related to earlier theoretical treatments of Carlson and Talmi and of Hecht. A simple A-dependence is assumed to account for the increase in radius. Introducing average matrix elements for the Coulomb interactions between valence-valence, valence-core, and core-core protons in each of the six major shell regions as adjustable parameters, a global fit with 21 parameters to 288 experimental Coulomb displacement energies with 4 < A < 240 gives good agreement with a standard deviation of σ = 45 keV. The interaction energies display discontinuities particularly at major proton shell crossings, and they generally decrease within shells less rapidly than A−13. The average decrease, however, follows approximately an A−13 dependence which explains the success of Coulomb energy equations based on liquid-drop models.
DOI : 10.1016/0375-9474(83)90404-9
Cilt: 410
Sayı: 1
Sayfa: 103-124
ISSN: 0375-9474
23
Levels of 14N near 13.7 MeV excitation from the analysis of Doppler-broadened γ-line shapes in the 10B(α, pγ)13C reaction
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
J. Cseh , Á. Z. Kiss , E. Koltay , B. Nyakó , É. Pintye
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
Excitation functions have been measured in the 10B(α, pγ)13C reaction by means of γ-detection. An enriched target and a Ge(Li) detector were used. The Doppler-broadened γ-line shape has been analysed, resulting in the angular distributions of protons for each bombarding energy. From a R-matrix analysis of these distributions, the parameters corresponding to three resonances have been determined.
DOI : 10.1016/0375-9474(83)90407-4
Anahtar Kelimeler : Nuclear reactions
Cilt: 410
Sayı: 1
Sayfa: 147-155
ISSN: 0375-9474
24
Physics with 4π−γ-detectors
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
V. Metag , R.D. Fischer , W. Kühn , R. Mühlhans , R. Novotny , D. Habs , U.v. Helmolt , H.W. Heyng , R. Kroth , D. Pelte , D. Schwalm , W. Hennerici , H.J. Hennrich , G. Himmele , E. Jaeschke , R. Repnow , W. Wahl , E. Adelberger , B. Kolb
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The broad range of applications of the Darmstadt-Heidelberg crystal ball is illustrated. First results are discussed which have been obtained in investigations of the nuclear structure of rapidly rotating nuclei, in studies of nuclear reaction mechanisms, and in experiments with radioactive sources.
DOI : 10.1016/0375-9474(83)90695-4
Cilt: 409
Sayı: 0
Sayfa: 331-342
ISSN: 0375-9474
25
Models of nuclear dynamics at intermediate energies
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Klaus Dietrich
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
A review on dynamical models and their validity limits in the energy range 100MeV
DOI : 10.1016/0375-9474(83)90692-9
Cilt: 409
Sayı: 0
Sayfa: 303-319
ISSN: 0375-9474
26
Spectroscopic quadrupole moment of 23Na from muonic X-rays
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
B. Jeckelmann , W. Beer , I. Beltrami , F.W.N. de Boer , G. de Chambrier , P.F.A. Goudsmit , J. Kern , H.J. Leisi , W. Ruckstuhl , A. Vacchi
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
With the crystal spectrometer at muon channel I at SIN we measured the 3d52−2p32 transition in muonic 23Na. The h.f.s. of the 2p32 level was resolved and the spectroscopic quadrupole moment of the nuclear ground state determined: Q = 0.1006 ± 0.0020 b. Using a collective particle-rotor model description of 23Na which includes small ΔK = 1 admixtures in the wave functions, we find agreement between our measured spectroscopic quadrupole moment and the one derived from measured B(E2) values. Combining the quadrupole moment Q with the quadrupole coupling constant measured in the electronic atom of 23Na, we derive the electric field gradient at the nucleus for two different electronic states: 〈dE/dz〉 = 0.1185(32)ea−30 for the 32P32 state, 〈dE/dz〉 = 0.0410(27)ea−30 for the 42P32 state. The field gradient for the 32P32 state is compared with recent many-body calculations of the hyperfine interaction in alkali atoms.
DOI : 10.1016/0375-9474(83)90242-7
Cilt: 408
Sayı: 3
Sayfa: 495-506
ISSN: 0375-9474
27
The (p, t) and (p, 3He) reactions on 10B at Ep = 52 MeV
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
M. Yasue , H. Yokomizo , T. Hasegawa , F. Soga , M.H. Tanaka , K. Koyama , K. Iwatani
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The 10B(p, t)8B and 10B(p, 3He)8Be reactions have been studied by using 51.9 MeV proton beams. Angular distributions for these reactions are analyzed on the basis of the wave functions of Cohen and Kurath within the framework of zero-range DWBA calculations. An isospin mixing ratio has been deduced for the 16.63 MeV and 16.92 MeV states of 8Be, and compared with previous works. The effect of the coupling of the 0+ ground state and the 2.9 MeV 2+ state in 8Be on the shape of the angular distributions for the 10B(p, 3He)8Be reaction leading to these states is also investigated in the second-order DWBA.
DOI : 10.1016/0375-9474(83)90581-X
Anahtar Kelimeler : Nuclear reactions
Cilt: 408
Sayı: 2
Sayfa: 205-220
ISSN: 0375-9474
28
The photoneutron cross section of 151Eu, 153Eu and 156Gd in the giant resonance region
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
T.J. Boal , E.G. Muirhead , D.J.S. Findlay
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
The 151Eu, 153Eu and 156Gd photoneutron cross sections in the giant dipole resonance region have been measured using bremsstrahlung from the University of Melbourne betatron. Absolute cross-section values, lorentzian parameters, intrinsic quadrupole moments, deformation parameters and integrated cross-section values are derived. For 151Eu and 153Eu the measured cross sections are in good agreement with the predictions of the extended dynamic collective model.
DOI : 10.1016/0375-9474(83)90460-8
Cilt: 406
Sayı: 2
Sayfa: 257-268
ISSN: 0375-9474
29
Properties of the three-nucleon bound states with virtual Δ-isobar excitation
Araştırma Makalesi

Araştırma Makalesi
Kaynak :
Science Direct
Yayıncı :
Nuclear Physics A
Yazar(lar) :
Ch. Hajduk , P.U. Sauer , W. Strueve
Yıl :
1983
Nuclear Physics A
Yayıncı Web Sitesi Tam Metin
Kaydet
Wave function components containing a single Δ-isobar are included in the calculation of the three-nucleon bound states. Multiple Δ-effects are ignored. The two-nucleon interaction acts in all partial waves up to total angular momentum I = 2. The presence of a Δ-isobar increases the three-nucleon binding energy by about 0.3 MeV, 0.6 MeV repulsion being a dispersive two-body effect, and 0.9 MeV attraction arising from the three-nucleon force with an intermediate Δ-isobar. The effect of the Δ on the three-nucleon charge and magnetic form factors and on the weak decay is investigated.
DOI : 10.1016/0375-9474(83)90519-5
Cilt: 405
Sayı: 3
Sayfa: 581-604
ISSN: 0375-9474

Yayın Yılı

Sınırla

Doküman Türü
Tümü

Disiplin
Tümü

Disipline Göre İlgililik

Alt Disiplin
Tümü

Konu
Tümü

Dergi İsmi
Tümü

Veri Tabanı
Tümü

X
Filtreler