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 · Fri Nov 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.44.1963· OSTI ID:5129507

Kelly, J J; Khandaker, M A; Boberg, P; Feldman, A E; Flanders, B S; Hyman, S; Seifert, H ^[1]; Karen, P; Norum, B E; Welch, P ^[2]; Nanda, S; Saha, A ^[3]

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1. Department of Physics, University of Maryland, College Park, Maryland (USA)
2. Department of Physics, University of Virginia, Charlottesville, Virginia (USA)
3. Continuous Electron Beam Accelerator Facility, Newport News, Virginia (USA)

Differential cross sections and analyzing powers for low-lying states of {sup 32}S were measured using 318 MeV protons. The data were analyzed using an empirical effective interaction previously fitted to inelastic scattering data for {sup 16}O and {sup 40}Ca at the same energy. Transition densities for many 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. The accuracy of the procedure was tested by comparing isoscalar densities fitted to ({ital p},{ital p}{prime}) data for {sup 32}S with proton densities fitted to ({ital e},{ital e}{prime}) data. The good agreement between these analyses supports the quantitative accuracy of densities fitted to ({ital p},{ital p}{prime}) data. Isoscalar densities were also fitted to data for several states of {sup 32}S for which no ({ital e},{ital e}{prime}) data exist. We find that the experimental densities agree well with the shell model for the first 2{sup +} state, but that the neutron density for the second 2{sup +} state is distinctly different in shape. Good qualitative agreement between the data and the shell model is obtained for the first two 4{sup +} states of {sup 32}S. Transition densities were also fitted to the data for the lowest 1{sup {minus}}, 3{sup {minus}}, and 5{sup {minus}} states in {sup 32}S. The shape of the 1{sup {minus}} transition density is complicated, but the very small matrix element agrees with the approximate selection rule that suppresses isoscalar {ital E}1 moments.

• OSTI ID: 5129507
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 44:5; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
HADRON REACTIONS
INELASTIC SCATTERING
INFORMATION
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NEUTRON DENSITY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
PROTON REACTIONS
SCATTERING
SHELL MODELS
STABLE ISOTOPES
SULFUR 32
SULFUR 32 TARGET
SULFUR ISOTOPES
TARGETS