Isospin symmetry in the structure study of unstable nuclei

Y. Fujita, G. P.A. Berg, A. D. Bacher, T. Black, C. C. Foster, H. Fujimura, H. Fujita, K. Hara, K. Hatanaka, J. Jänecke, J. Kamiya, K. Katori, T. Kawabata, W. Lozowski, Tetsuo Noro, D. A. Roberts, Y. Shimbara, E. J. Stephenson, H. Ueno, T. YamanakaM. Yosoi

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Abstract

Assuming isospin T is a good quantum number, the analog states of the low-lying states in Tz = ±(T0+1) nuclei can be found as excited T0+1 states in Tz = ±T0 nuclei. Therefore, if T0 + 1 states are identified in the excited region of Tz = ±T0 nuclei, the structure of unstable nuclei with Tz = ±(T0 + 1) can be deduced. We measured and compared the transition strengths to pairs of excited analog states in inelastic and charge-exchange reactions on the same target nucleus. The T values of these analog states were identified by using the fact that the transition strengths to them are different depending on T. The identification of T = 1/2 and 3/2 nature of analog MI and GT states in the mirror nuclei pair 27Al and 27Si is reported by comparing the transition strengths in high-resolution 27Al(p,p′) and 27Al(3He, t)27Si reactions at 0°. The identified T = 3/2 states are analogous to the low-lying states of 27Mg, which plays an important role in rp-process of nucleosynthesis.

Original languageEnglish
Pages (from-to)473-477
Number of pages5
JournalProgress of Theoretical Physics
Issue number146 SUPPL.
Publication statusPublished - Dec 1 2002

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nuclei
symmetry
analogs
nuclear fusion
charge exchange
quantum numbers
mirrors
high resolution

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Fujita, Y., Berg, G. P. A., Bacher, A. D., Black, T., Foster, C. C., Fujimura, H., ... Yosoi, M. (2002). Isospin symmetry in the structure study of unstable nuclei. Progress of Theoretical Physics, (146 SUPPL.), 473-477.

Isospin symmetry in the structure study of unstable nuclei. / Fujita, Y.; Berg, G. P.A.; Bacher, A. D.; Black, T.; Foster, C. C.; Fujimura, H.; Fujita, H.; Hara, K.; Hatanaka, K.; Jänecke, J.; Kamiya, J.; Katori, K.; Kawabata, T.; Lozowski, W.; Noro, Tetsuo; Roberts, D. A.; Shimbara, Y.; Stephenson, E. J.; Ueno, H.; Yamanaka, T.; Yosoi, M.

In: Progress of Theoretical Physics, No. 146 SUPPL., 01.12.2002, p. 473-477.

Research output: Contribution to journalArticle

Fujita, Y, Berg, GPA, Bacher, AD, Black, T, Foster, CC, Fujimura, H, Fujita, H, Hara, K, Hatanaka, K, Jänecke, J, Kamiya, J, Katori, K, Kawabata, T, Lozowski, W, Noro, T, Roberts, DA, Shimbara, Y, Stephenson, EJ, Ueno, H, Yamanaka, T & Yosoi, M 2002, 'Isospin symmetry in the structure study of unstable nuclei', Progress of Theoretical Physics, no. 146 SUPPL., pp. 473-477.
Fujita Y, Berg GPA, Bacher AD, Black T, Foster CC, Fujimura H et al. Isospin symmetry in the structure study of unstable nuclei. Progress of Theoretical Physics. 2002 Dec 1;(146 SUPPL.):473-477.
Fujita, Y. ; Berg, G. P.A. ; Bacher, A. D. ; Black, T. ; Foster, C. C. ; Fujimura, H. ; Fujita, H. ; Hara, K. ; Hatanaka, K. ; Jänecke, J. ; Kamiya, J. ; Katori, K. ; Kawabata, T. ; Lozowski, W. ; Noro, Tetsuo ; Roberts, D. A. ; Shimbara, Y. ; Stephenson, E. J. ; Ueno, H. ; Yamanaka, T. ; Yosoi, M. / Isospin symmetry in the structure study of unstable nuclei. In: Progress of Theoretical Physics. 2002 ; No. 146 SUPPL. pp. 473-477.
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AU - Berg, G. P.A.

AU - Bacher, A. D.

AU - Black, T.

AU - Foster, C. C.

AU - Fujimura, H.

AU - Fujita, H.

AU - Hara, K.

AU - Hatanaka, K.

AU - Jänecke, J.

AU - Kamiya, J.

AU - Katori, K.

AU - Kawabata, T.

AU - Lozowski, W.

AU - Noro, Tetsuo

AU - Roberts, D. A.

AU - Shimbara, Y.

AU - Stephenson, E. J.

AU - Ueno, H.

AU - Yamanaka, T.

AU - Yosoi, M.

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N2 - Assuming isospin T is a good quantum number, the analog states of the low-lying states in Tz = ±(T0+1) nuclei can be found as excited T0+1 states in Tz = ±T0 nuclei. Therefore, if T0 + 1 states are identified in the excited region of Tz = ±T0 nuclei, the structure of unstable nuclei with Tz = ±(T0 + 1) can be deduced. We measured and compared the transition strengths to pairs of excited analog states in inelastic and charge-exchange reactions on the same target nucleus. The T values of these analog states were identified by using the fact that the transition strengths to them are different depending on T. The identification of T = 1/2 and 3/2 nature of analog MI and GT states in the mirror nuclei pair 27Al and 27Si is reported by comparing the transition strengths in high-resolution 27Al(p,p′) and 27Al(3He, t)27Si reactions at 0°. The identified T = 3/2 states are analogous to the low-lying states of 27Mg, which plays an important role in rp-process of nucleosynthesis.

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