[en] The upgrade Gas-Filled Recoil-Ion Separator (GARIS) has been operated in RIKEN with the high-intensity heavy-ion linac (RILAC).Three alpha-decay chains of 271[110], which were produced by the 208Pb(64Ni, n)271[110] reaction, have been identified and thus confirmed the observation at GSI. The same system was used to observe a new isotope 234Bk by 197Au(40Ar, 3n)234Bk reaction. The data indicate a possible existence of two states in 234Bk. The decay product of 234Bk, 230Am decays mainly by β decay because no α decay has been observed. The estimated halflife of 230Am is 17+15-12 s. We also report the results of search of Z=118 element. (author)
Source
Sagawa, Hiroyuki (ed.) (Univ. of Aizu, Aizu-Wakamatsu, Fukushima (Japan)); Iwasaki, Hironori (ed.) (Tokyo Univ., Tokyo (Japan)); 446 p; ISBN 981-238-198-8; 
; 2003; p. 140-146; CM2002: International symposium on frontiers of collective motions; Aizu-Wakamatsu, Fukushima (Japan); 6-9 Nov 2002; 6 refs., 3 figs.
; 2003; p. 140-146; CM2002: International symposium on frontiers of collective motions; Aizu-Wakamatsu, Fukushima (Japan); 6-9 Nov 2002; 6 refs., 3 figs.