학술논문
Nuclear structure study for the neutron-rich nuclei beyond 132Sn: In-beam gamma-ray spectroscopy of 136Sn and 132Cd
Document Type
article
Author
Wang He; Aoi Nori; Takeuchi Satoshi; Matsushita Masafumi; Doornenbal Pieter; Motobayashi Tohru; Steppenbeck David; Yoneda Kenichiro; Baba Hidetada; Dombrádi Zsolt; Kobayashi Kota; Kondo Yosuke; Lee Jenny; Liu Hong-Na; Minakata Ryogo; Nishimura Daiki; Otsu Hideaki; Sakurai Hiroyoshi; Sohler Dora; Sun Ye-Lei; Tian Zheng-Yang; Tanaka Ryuki; Vajta Zsolt; Yang Zai-Hong; Yamamoto Tetsuya; Ye Yan-Lin; Yokoyama Rin
Source
EPJ Web of Conferences, Vol 178, p 02019 (2018)
Subject
Language
English
ISSN
2100-014X
Abstract
The neutron-rich nuclei 136Sn and 132Cd have been studied in the purpose of nuclear structure for the nuclei beyond the doubly-magic nucleus 132Sn. The 2+1 → 0+ gs transitions were identified for these two nuclei using in-beam γ-ray spectroscopy in coincidence with one- and two-proton removal reactions, respectively, at the RIKEN Radioactive Isotope Beam Factory. The 2+ 1 state in 136Sn is found to be similar to that for 134Sn indicating the seniority scheme may also hold for the heavy tin isotopes beyond N = 82. For 132Cd, the 2+ 1 state provides the first spectroscopic information in the even-even nuclei locating in the region “southeast” of 132Sn and the result is discussed in terms of proton-neutron configuration mixing. In both these two nuclei, it was found that the valence neutrons play an essential role in their low-lying excitations.