beta-decay scheme of Te-140 to I-140: Suppression of Gamow-Teller transitions between the neutron h(9/2) and proton h(11/2) partner orbitals
- Authors
- Moon, B.; Moon, C. -B.; Odahara, A.; Lozeva, R.; Soderstrom, P. -A.; Browne, F.; Yuan, C.; Yagi, A.; Hong, B.; Jung, H. S.; Lee, P.; Lee, C. S.; Nishimura, S.; Doornenbal, P.; Lorusso, G.; Sumikama, T.; Watanabe, H.; Kojouharov, I.; Isobe, T.; Baba, H.; Sakurai, H.; Daido, R.; Fang, Y.; Nishibata, H.; Patel, Z.; Rice, S.; Sinclair, L.; Wu, J.; Xu, Z. Y.; Yokoyama, R.; Kubo, T.; Inabe, N.; Suzuki, H.; Fukuda, N.; Kameda, D.; Takeda, H.; Ahn, D. S.; Shimizu, Y.; Murai, D.; Garrote, F. L. Bello; Daugas, J. M.; Didierjean, F.; Ideguchi, E.; Ishigaki, T.; Morimoto, S.; Niikura, M.; Nishizuka, I.; Komatsubara, T.; Kwon, Y. K.; Tshoo, K.
- Issue Date
- 31-7월-2017
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW C, v.96, no.1
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW C
- Volume
- 96
- Number
- 1
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/82781
- DOI
- 10.1103/PhysRevC.96.014325
- ISSN
- 2469-9985
- Abstract
- We report for the first time the beta-decay scheme of Te-140 (Z = 52) to I-140 (Z = 53), with a specific focus on the Gamow-Teller strength along N = 87 isotones. These results were obtained in an experiment performed at the Radioactive Ion Beam Factory (RIBF), RIKEN, where the parent nuclide, Te-140, was produced through the in-flight fission of a U-238 beam at 345 MeV per nucleon impinging on a Be-9 target. Based on data from the high-efficiency gamma-ray spectrometer, EUROBALL-RIKEN Cluster Array (EURICA), we constructed a decay scheme of I-140. The half-life of Te-140 has been determined to be 350(5) ms. A level at 926 keV has been assigned as a (1(+)) state based on the log ft value of 4.89(6). This (1(+)) state, commonly observed in odd-odd nuclei, can be interpreted in terms of the pi h(11/2)nu h(9/2) configuration formed by the Gamow-Teller transition between a neutron in the h(9/2) orbital and a proton in the h(11/2) orbital. We observe a sharp contrast to this type of beta-decay branching to the lower-lying 1(+) states between I-140 and I-136, where we see a large reduction as the number of neutrons increases. This is in contrast to the prediction by large-scale shell model calculations. To investigate this type of the suppression, results of the Nilsson model calculations will be discussed. Along the isotones with N = 87, we discuss a characteristic feature of the Gamow-Teller distributions at 1(+) states with respect to the isospin difference.
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