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Research on isobaric analog resonances in $sup 32$S by means of the reactions $sup 31$P(p,$gamma$$)$$sup 32$S, $sup 31$P(p,p)$sup 31$P, and $sup 31$P(p,$alpha$$sub 0$$)$$sup 28$Si (in French)

Journal Article · · Nucl. Phys., A, v. A212, no. 3, pp. 493-530
OSTI ID:4431315
; ; ;

Fourteen resonance levels were observed in a study of the /sub o/)/sup 28/Si reactions in the proton energy range E/sub p/ = 1240 to 1600 keV. Resonance strengths were determined for thirteen resonances of the /sup 31/P(p, gamma )/sup 32/S reaction. The gamma -ray decay schemes of ten resonances were studied by means of a Ge(Li) detector. Spin values of resonance levels and of some bound levels were obtained or confirmed by gamma -ray angular distribution measurements done at seven resonances. For the thirteen resonances of the /sup 31/P(p,p)/sup 31/P reaction the proton orbital momenta were determined. By combining the information from the three reactions, spins, parities, and total and partial widths were obtained for twelve resonance levels. Strong M1 transitions were observed at the E/sub p/ = 1247; 1402; 1437; 1555; and 1581-keV resonances. Two T-mixed doublets were identified at E = 1247 and 1472 keV J/sup pi /= 2/sup -/, and at E/sub p/ = 1402 and 1469 keV, J/sup pi / = 3/sup -/. The resona nce levels at E/sub p/ = 1437 and 1581 keV may be components of a third almost completely mixed doublet. The E/sub p/ = 1555 keV resonance level was assigned T = 1. The E/sub p/ = 1411-keV, J/sup pi /= 1/sup +/, resonance level was identified with a level previously observed in the BETA + decay of /sup 32/ Cl. Strong E2 transitions similar to those observed in some other doubly even s-- d shell nuclei were observed between odd-parity levels of /sup 32/S. (11 figures, 9 tables, 59 references) (auth)

Research Organization:
Institut de Physique Nucleaire, Orsay, France
NSA Number:
NSA-29-001623
OSTI ID:
4431315
Journal Information:
Nucl. Phys., A, v. A212, no. 3, pp. 493-530, Journal Name: Nucl. Phys., A, v. A212, no. 3, pp. 493-530; ISSN NUPAB
Country of Publication:
Country unknown/Code not available
Language:
French

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Related Subjects

ANGULAR DISTRIBUTION-- CAPTURE-- EXCITATION FUNCTIONS-- GAMMA RADIATION-- LEVEL WIDTHS-- MEV RANGE 01-10-- PARITY-- PHOSPHORUS 31-- PROTON REACTIONS-- SPIN-- SULFUR 32
BRANCHING RATIO-- ENERGY-LEVEL TRANSITIONS-- ISOBARIC ANALOGS-- ISOSPIN-- LEVEL WIDTHS-- MIXING RATIO-- MULTIPOLARITY-- PARITY-- SPECTROSCOPIC FACTORS-- SPIN-- STRENGTH FUNCTIONS-- SULFUR 32
N68431* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
20 <= A <= 38--Energy Levels & Transitions
N68451 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
20 <= A <= 38--Nuclear Reactions & Scattering
RESONANCE ELASTIC SCATTERING-- EXCITATION FUNCTIONS-- MEV RANGE 01-10-- PHOSPHORUS 31-- PROTON REACTIONS