Microscopic structure of the Gamow-Teller resonance inCu58
| Autor: | Y. Fujita, Hisataka Yoshida, I. Daito, H. Fujimura, M. Fujiwara, Hidetoshi Akimune, Keigo Kawase, K. Ichihara, Yasuhiro Sakemi, K. Nakanishi, Takatsugu Ishikawa, Yuji Shimizu, K. Y. Hara, R. G.T. Zegers, Mohsen Harakeh, Ken-Ichi Fushimi, J. W. Jänecke, Y. Shimbara, Junichiro Kamiya, Takahiro Kawabata, K. Hara, M. Uchida, M. Yosoi, Tatuya Adachi |
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| Rok vydání: | 2003 |
| Předmět: |
Nuclear and High Energy Physics
Proton decay Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory Cyclotron TRANSITIONS law.invention law EXCITATION STRENGTH LEVEL DENSITY NI-58 Proton emission Nuclear Experiment Physics NUCLEI Spectrometer Branching fraction PROTON INELASTIC-SCATTERING Resonance STATES Excited state ISOTOPES ELECTROEXCITATION Atomic physics Excitation |
| Zdroj: | Physical Review C, 68(6):064612. AMER PHYSICAL SOC |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.68.064612 |
| Popis: | The Gamow-Teller (GT) states in Cu-58 have been studied via the Ni-58(He-3, t+p) and Ni-58(He-3, t+gamma) coincidence experiments. The GT states in Cu-58 at E-x=6-12 MeV, where both T=1 and T=2, 1(+) states exist, are excited strongly in the Ni-58(He-3, t) reaction at E(He-3)=450 MeV and theta=0degrees. Proton emissions from the GT states in Cu-58 to the hole states in Ni-57 have been observed with solid-state detectors in coincidence with high energy tritons measured with a magnetic spectrometer. For the first time, the gamma-ray emissions from the excited states in Cu-58 and in Ni-57, following the Ni-58(He-3, t+p) reaction at intermediate energies, have also been observed in coincidence with tritons. Strengths of proton decay into several neutron-hole states in Ni-57 and gamma-decay strengths are used to discuss the wave functions of the GT states in Cu-58. The T=1 and T=2 GT states do only weakly decay into a T=3/2,f(7/2)(-1) neutron-hole state at 5.230 MeV in Ni-57, which is strongly excited via the Ni-58(p, d)Ni-57 reaction. The wave functions of the T=1 and T=2 GT states with the f(7/2)(-1) neutron-hole configuration are inferred to be strongly coupled to 2p-2h configurations, making fragmented GT strengths in Cu-58. |
| Databáze: | OpenAIRE |
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