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Title: 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

Abstract

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.

Authors:
; ; ;  [1]; ; ; ;  [2];  [3];  [4]; ; ; ;  [5]; ; ; ; ; ;  [6]
  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)
Publication Date:
OSTI Identifier:
20771262
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.73.024311; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Adachi, T, Fujita, Y, Fujita, H, Shimbara, Y, Brentano, P von, Fransen, C, Pietralla, N, Zell, K O, Lisetskiy, A F, Berg, G P.A., De Frenne, D, Jacobs, E, Negret, A, Popescu, L, Fujita, K, Hatanaka, K, Kamiya, J, Kawase, K, Nakanishi, K, and Sakemi, Y. 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. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.024311.
Adachi, T, Fujita, Y, Fujita, H, Shimbara, Y, Brentano, P von, Fransen, C, Pietralla, N, Zell, K O, Lisetskiy, A F, Berg, G P.A., De Frenne, D, Jacobs, E, Negret, A, Popescu, L, Fujita, K, Hatanaka, K, Kamiya, J, Kawase, K, Nakanishi, K, & Sakemi, Y. 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. United States. https://doi.org/10.1103/PhysRevC.73.024311
Adachi, T, Fujita, Y, Fujita, H, Shimbara, Y, Brentano, P von, Fransen, C, Pietralla, N, Zell, K O, Lisetskiy, A F, Berg, G P.A., De Frenne, D, Jacobs, E, Negret, A, Popescu, L, Fujita, K, Hatanaka, K, Kamiya, J, Kawase, K, Nakanishi, K, and Sakemi, Y. 2006. "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". United States. https://doi.org/10.1103/PhysRevC.73.024311.
@article{osti_20771262,
title = {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},
author = {Adachi, T and Fujita, Y and Fujita, H and Shimbara, Y and Brentano, P von and Fransen, C and Pietralla, N and Zell, K O and Lisetskiy, A F and Berg, G P.A. and De Frenne, D and Jacobs, E and Negret, A and Popescu, L and Fujita, K and Hatanaka, K and Kamiya, J and Kawase, K and Nakanishi, K and Sakemi, Y},
abstractNote = {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.},
doi = {10.1103/PhysRevC.73.024311},
url = {https://www.osti.gov/biblio/20771262}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 73,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}