Low-lying Gamow-Teller states in {sup 92}Nb

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.2709· OSTI ID:284756

Grimes, S M ^[1]; Bauer, R W; Anderson, J D; Brown, V R; Pohl, B A; Poppe, C H ^[2]; Madsen, V A ^[3]; Langkau, R; Scobel, W; Stamer, S ^[4]

---

1. Ohio University, Athens, Ohio 45701 (United States)
2. Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)
3. Oregon State University, Corvallis, Oregon 97331 (United States)
4. I. Institut fuer Experimentalphysik, University of Hamburg (Federal Republic of Germany)

Cross sections for the ({ital p},{ital n}) reaction on targets of {sup 90}Zr and {sup 92}Zr have been measured at 26 MeV. Our resolution for these measurements was better than 200 keV and allowed the observation of numerous 1{sup +} states in {sup 92}Nb below 7 MeV excitation. Our analysis is focused on states below the primary Gamow-Teller state and shows a fragmentation of the Gamow-Teller strength that is only partially accounted for by three different model calculations: a quasiparticle model, a shell model, and a random-phase approximation calculation. All three models yield predictions which include appreciable strength between 3 and 7 MeV excitation, but fail to describe our experimental results in detail. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Lawrence Livermore National Laboratory
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 284756
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 53; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BETA DECAY
CROSS SECTIONS
EXCITATION
FRAGMENTATION
GAMOW-TELLER RULES
NEUTRONS
NIOBIUM 92
NUCLEON-NUCLEON INTERACTIONS
PROTON REACTIONS
QUASI PARTICLES
RANDOM PHASE APPROXIMATION
RESOLUTION
SHELL MODELS
ZIRCONIUM 90 TARGET
ZIRCONIUM 92 TARGET