Microscopic structure of the Gamow-Teller resonance in 58Cu

K. Hara, T. Adachi, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, K. Y. Hara, M. N. Harakeh, K. Ichihara, T. Ishikawa, J. Jänecke, J. Kamiya, T. Kawabata, K. Kawase, K. Nakanishi, Y. Sakemi, Y. Shimbara, Y. ShimizuM. Uchida, H. P. Yoshida, M. Yosoi, R. G.T. Zegers

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Abstract

The Gamow-Teller (GT) states in 58Cu have been studied via the 58Ni(3He, t+p) and 58Ni(3He, t+γ) coincidence experiments. The GT states in 58Cu at E X=6-12 MeV, where both T=1 and 1=2, 1+ states exist, are excited strongly in the 58Ni(3He, f) reaction at E( 3He)=450 MeV and θ=0°. Proton emissions from the GT states in 58Cu to the hole states in 57Ni have been observed with solid-state detectors in coincidence with high energy tritons measured with a magnetic spectrometer. For the first time, the γ-ray emissions from the excited states in 58Cu and in 37Ni, following the 58Ni(3He, t+p) reaction at intermediate energies, have also been observed in coincidence with tritons. Strengths of proton decay into several neutron-hole states in 57Ni and γ-decay strengths are used to discuss the wave functions of the GT states in 58Cu. The T= 1 and T=2 GT states do only weakly decay into a T=3/2, f7/2 -1 neutron-hole state at 5.230 MeV in 57Ni, which is strongly excited via the 58Ni(p, d)57Ni reaction. The wave functions of the T=1 and T=2 GT states with the f7/2 -1 neutron-hole configuration are inferred to be strongly coupled to 2p-2h configurations, making fragmented GT strengths in 58Cu.

Original languageEnglish
Article number064612
Pages (from-to)646121-646129
Number of pages9
JournalPhysical Review C - Nuclear Physics
Volume68
Issue number6
Publication statusPublished - 2003 Dec

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Hara, K., Adachi, T., Akimune, H., Daito, I., Fujimura, H., Fujita, Y., Fujiwara, M., Fushimi, K., Hara, K. Y., Harakeh, M. N., Ichihara, K., Ishikawa, T., Jänecke, J., Kamiya, J., Kawabata, T., Kawase, K., Nakanishi, K., Sakemi, Y., Shimbara, Y., ... Zegers, R. G. T. (2003). Microscopic structure of the Gamow-Teller resonance in 58Cu. Physical Review C - Nuclear Physics, 68(6), 646121-646129. [064612].