Pion scattering to 6{sup {minus}} stretched states in {sup 32}S

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.55.625· OSTI ID:488765

Clausen, B L; Johnson, T W ^[1]; Lindgren, R A; Cromer, K ^[2]; Peterson, R J ^[3]; Bacher, A D ^[4]; Ward, H; Williams, A L ^[5]

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1. Geoscience Research Institute, Loma Linda University, Loma Linda, California 92350 (United States)
2. Institute of Nuclear and Particle Physics and Department of Physics, University of Virginia, Charlottesville, Virginia 22901 (United States)
3. Nuclear Physics Laboratory, University of Colorado, Boulder, Colorado 80309 (United States)
4. Indiana University Cyclotron Facility, Bloomington, Indiana 47408 (United States)
5. Department of Physics, University of Texas, Austin, Texas 78712 (United States)

Inelastic {pi}{sup {plus_minus}} differential cross-section measurements at a pion incident energy of 162 MeV were made for 12 (f{sub 7/2}{sup d}{sub 5/2}{sup {minus}}1) 6{sup {minus}} states in {sup 32}S, including four tentative new isoscalar states. Isoscalar and isovector magnetic structure coefficients were determined for each state by combining the pion data with previous electron scattering data. The trend of small isoscalar/isovector strength ratios continues in {sup 32}S, with the isovector strength being comparable to theoretical calculations, but the isoscalar strength exhausting only about 17{percent} of an extreme-single-particle-hole model. However, this isoscalar strength is larger than that observed in other sd-shell nuclei and exhausts 75{percent} of large-basis shell-model predictions. The substantial fragmentation of the 6{sup {minus}} isovector strength observed in {sup 32}S electron scattering, but not previously observed in other self-conjugate nuclei, appears to extend to the isoscalar strength and to include substantial isospin mixing. The general systematics of isoscalar and isovector stretched state transition strengths are reviewed. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 488765
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 55; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DIFFERENTIAL CROSS SECTIONS
ENERGY-LEVEL TRANSITIONS
HIGH SPIN STATES
INELASTIC SCATTERING
ISOSPIN
MEV RANGE 100-1000
MIXING
PION REACTIONS
SHELL MODELS
SULFUR 32 TARGET