Neutron and proton transition densities from 32,34S(p,p’) at Ep=318 MeV. II. Neutron densities for 34S
Differential cross sections and analyzing powers for low-lying states of 34S were measured using 318 MeV protons. Neutron transition densities for the 21+ and 22+ states were fitted to the data using general expansions which permit evaluation of uncertainties due to statistical and normalization errors, penetrability and distortion, and incompleteness in momentum space. We find that the experimental densities agree well with the shell model for the first 2+ state, but that the neutron density for the second 2+ state is distinctly different in shape. We also find Mn/Mp=+0.27(6) for the 22+ state, in qualitative agreement with electromagnetic results for A=34 but in marked disagreement with the shell-model prediction of Mn/Mp=-0.61. A detailed analysis of earlier data for 650 MeV, originally described as qualitatively consistent with the shell model, is also presented and shows that these data are more consistent with the present results. The shape of the isoscalar density for the 22+ state of 34S cannot be reproduced with the sd shell, supplemented by surface-peaked core polarization, but can be reproduced if an empirical (1f)2 contribution is admitted. Shell-model calculations were performed for other 2+ and 4+ states of 34S, but give cross sections well below the (p,p’) data for all but the lowest 2+ state. The data for the lowest 1-, 3-, and 5- states in both 34S and 32S are very similar.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA
- Sponsoring Organization:
- USDOE - Office of Energy Research (ER)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 918876
- Report Number(s):
- CEBAF-PR-91-59; DOE/ER/40150-4380
- Journal Information:
- Phys. Rev. C, Journal Name: Phys. Rev. C Vol. 44; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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Neutron and proton transition densities from sup 32,34 S( p , p prime ) at E sub p =318 MeV. II. Neutron densities for sup 34 S
Neutron and proton transition densities from S-32, S-34 (p, p') at Ep=318 MeV. 1. Isoscalar densities for S-32
Neutron and proton transition densities from sup 32,34 S( p , p prime ) at E sub p =318 MeV. I. Isoscalar densities for sup 32 S
Journal Article
·
Thu Oct 31 23:00:00 EST 1991
· Physical Review, C (Nuclear Physics); (United States)
·
OSTI ID:5023254
Neutron and proton transition densities from S-32, S-34 (p, p') at Ep=318 MeV. 1. Isoscalar densities for S-32
Journal Article
·
Thu Oct 31 23:00:00 EST 1991
· Phys. Rev. C
·
OSTI ID:918877
Neutron and proton transition densities from sup 32,34 S( p , p prime ) at E sub p =318 MeV. I. Isoscalar densities for sup 32 S
Journal Article
·
Thu Oct 31 23:00:00 EST 1991
· Physical Review, C (Nuclear Physics); (United States)
·
OSTI ID:5129507