High-resolution study of Gamow-Teller transitions from the T{sub z}=1 nucleus {sup 46}Ti to the T{sub z}=0 nucleus {sup 46}V

Journal Article · Wed Feb 15 00:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.024311· OSTI ID:20771262

Adachi, T; Fujita, Y; Fujita, H; Shimbara, Y ^[1]; Brentano, P von; Fransen, C; Pietralla, N; Zell, K O ^[2]; Lisetskiy, A F ^[3]; Berg, G P.A. ^[4]; De Frenne, D; Jacobs, E; Negret, A; Popescu, L ^[5]; Fujita, K; Hatanaka, K; Kamiya, J; Kawase, K; Nakanishi, K; Sakemi, Y ^[6]

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1. Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
2. Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Cologne (Germany)
3. NSCL, Michigan State University, East Lansing, Michigan 48824 (United States)
4. Kernfysisch Versneller Instituut, Zernikelaan 25, 9747 AA Groningen (Netherlands)
5. Vakgroep Subatomaire en Stralingsfysica, Universiteit Gent, B-9000 Gent (Belgium)
6. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047 (Japan)

The Gamow-Teller (GT) transition strengths in fp-shell nuclei are important parameters in presupernova models. A high-energy-resolution ({sup 3}He,t) experiment was performed on the T{sub z}=1 nucleus {sup 46}Ti at 0 deg. and at an intermediate incident energy of 140 MeV/nucleon for the study of precise GT transition strengths to the final T{sub z}=0 nucleus {sup 46}V. With an energy resolution of 33 keV, individual GT transitions were observed and GT strengths were derived for them up to the excitation energy of 4.5 MeV. The GT strengths were compared with shell-model calculations using various effective interactions. In this low-lying region, most GT states have isospin T=0. A few GT states with isospin T=1 were identified from the existence of the corresponding (analog) M1 states in {sup 46}Ti. By comparing the GT strength with the corresponding (analogous) M1 transition strength studied in {sup 46}Ti(e,e{sup '}) or ({gamma},{gamma}{sup '}) measurements, a large constructive interference of orbital and spin terms was suggested for one of these M1 transitions.

• OSTI ID: 20771262
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 73, Issue 2; Other Information: DOI: 10.1103/PhysRevC.73.024311; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
ELECTRON REACTIONS
ELECTRONS
ENERGY RESOLUTION
EXCITATION
GAMOW-TELLER RULES
HELIUM 3 REACTIONS
ISOSPIN
KEV RANGE
M1-TRANSITIONS
MEV RANGE
SHELL MODELS
SPIN
TITANIUM 46
TITANIUM 46 TARGET
VANADIUM 46