Gamow-Teller and spin-dipole strength in sup 90 Zr( n , p ) at 65 MeV

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Physical Review (Section) C: Nuclear Physics; (USA)

OSTI ID:5594686

Brady, F P; Ford, T D; Romero, J L; Castaneda, C M; Drummond, J R; Hjort, E L; King, N S.P.; McEachern, B; Sorenson, D S; Aung, Z ^[1]; others, and

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1. Crocker Nuclear Laboratory and Department of Physics, University of California, Davis, California 95616 (US)

The {sup 90}Zr({ital n},{ital p}) reaction at 65 MeV has been studied over a wide range of angles down to 0{degree}. At low excitations the main strength appears to be in three concentrations of spin-dipole strength. Within certain limits Gamow-Teller {beta}{sup +} strength is not evident in the spectra. Together with the earlier analysis of {beta}{sup {minus}} strength in {sup 90}Zr({ital p},{ital n}) these ({ital n},{ital p}) results suggest either (1) that Gamow-Teller quenching due to {Delta}(isobar)-hole mixing in nuclear particle-hole excitations is relatively small ({approx lt}15%), or (2) that {Delta}-hole quenching is percentagewise much larger ({ital x}5) for {beta}{sup +} than for {beta}{sup {minus}} transitions.

• OSTI ID: 5594686
• Journal Information: Physical Review (Section) C: Nuclear Physics; (USA), Journal Name: Physical Review (Section) C: Nuclear Physics; (USA) Vol. 40:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651720* -- Nuclear Properties & Reactions
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
CHARGE-EXCHANGE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
FUNCTIONS
HADRON REACTIONS
HADRONS
INFORMATION
MEV RANGE
MEV RANGE 10-100
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
PROTONS
STRENGTH FUNCTIONS
TARGETS
ZIRCONIUM 90 TARGET