Fission experiment using Es-254 at JAEA Tokai tandem accelerator facility

Hirose, Kentaro  ; Nishio, Katsuhisa   ; Makii, Hiroyuki   ; Orlandi, R.  ; Tsukada, Kazuaki  ; Asai, Masato  ; Sato, Tetsuya   ; Ito, Yuta   ; Suzaki, Fumi  ; Nagame, Yuichiro* ; Vermeulen, M. J.*; Andreyev, A. N.; Yan, S. Q.*; Aritomo, Yoshihiro*; Tanaka, Shoya; Miyamoto, Yuya*; Okubayashi, Mizuki*; Ishizaki, Shoma*; Ratha, K. K.*; Chiba, Satoshi*; Tsekhanovich, I.*; Otsuki, Tsutomu*; Tanaka, Taiki*; Morimoto, Koji*; Rykaczewski, K. P.*; Boll, R. A.*; Toyoshima, Atsushi*; Suzuki, Hayato; Kubono, Shigeru*

A specific phenomenon was found in fission-fragment mass distributions for nuclides around A=258 by spontaneous fission measurements. Fm256 splits into light and heavy fragments, like uranium isotopes, making two peaks in their mass distribution, whereas a sharp single peak was found in that of Fm258 which has only two more neutrons. In order to study such a specific phenomenon more widely, we performed an experiment of the multinucleon transfer fission in the O18+Es254 reaction at JAEA Tokai tandem accelerator facility.