High resolution (He-3,t) experiment on the double-beta decaying nuclei Te-128 and Te-130

作者：Puppe P^*; Lennarz A; Adachi T; Akimune H; Ejiri H; Frekers D; Fujita H; Fujita Y; Fujiwara M; Ganioglu E; Grewe E W; Hatanaka K; Hodak R; Iwamoto C; Khai N T; Okamoto A; Okamura H; Povinec P P; Susoy G; Suzuki T; Tamii A; Thies J H; Yosoi M

来源：Physical Review C, 2012, 86(4): 044603.

DOI：10.1103/PhysRevC.86.044603

Gamow-Teller (GT) strength distributions have been investigated in a high-resolution (He-3,t) charge-exchange experiment on the double-beta (beta beta ) decaying nuclei Te-128 and Te-130. The experiment was carried out at the Research Center for Nuclear Physics, Osaka, with a 420-MeV incident He-3 beam and the Grand Raiden magnetic spectrometer. A final-state energy resolution of 35 keV was achieved. The extracted GT strength distributions at low excitation energies in the final nuclei I-128 and I-130 are presented and discussed in the context of the beta beta decay matrix elements for the two tellurium nuclei. The additional neutron pair in Te-130 seems to produce a moderate increase in the fragmentation of the low-energy GT distribution.

• 出版日期2012-10-1