Status of super heavy element research using GARIS at RIKEN

✍ Scribed by K. Morimoto; K. Morita; D. Kaji; S. Goto; H. Haba; E. Ideguchi; R. Kanungo; K. Katori; H. Koura; H. Kudo; T. Ohnishi; A. Ozawa; J.C. Peter; T. Suda; K. Sueki; I. Tanihata; F. Tokanai; H. Xu; A.V. Yeremin; A. Yoneda; A. Yoshida; T.-L. Zhao; T. Zheng

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 388 KB
• Volume: 738
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2004.04.021

✦ Synopsis

A gas-filled recoil separat or GARIS for heavy element research was installed at, an experimental hall of the RIKEN linear Accelerat or (RILAC) facility. One of the interesting applications of the separator is t.he discovery of nuclei of superlieavy elements whose at,omic number are grater then 110. We performed experimenk to study productions and decays of heavy nuclei, 271Ds and 111, which were produced wit,h 208Pb + Ni -271Ds + n and 20yBi + Ni + 111 + n reactions. Fourteen atoms of 271Ds a,nd t,he same number of 272111 were detect,ed and identified. Exisknce of an isomeric state in 271Ds was confirnied. In the decay chains of 272111, spontaneous fission decays were observed in decay of 264Bh and 260Db.