Speaker
Dr
Toshiyuki Sumikama
(Tohoku University)
Description
RI beam factory at RIKEN provides an RI beam as a projectile fragments. Because the fragments are produced from an primary beam with 345 MeV/u, an energy of reaction-type experiments is usually higher than ~100 MeV/u. However, a low energy RI beam with 15 MeV/u is required for an investigation of the shell evolution via transfer reactions. The low energy RI beam also provides opportunities of a deep-inelastic reaction and fusion reaction.
In the present study, the low energy RI beam was produced by slowing down the projectile fragment with a momentum compression scheme proposed at the RNB8 conference [1]. The RI beam of 82Ge was produced via the in-flight fission reaction of 238U with 345 MeV/u. The momentum-compressed and momentum-achromatic beam was produced at the second stage of the fragment separator BigRIPS. The energy was slowed down to ~ 15 MeV/u using five energy degraders. The beam size of 11mm phi (sigma) was achieved. We will present the slowed-down scheme and results in this conference.
[1] T. Sumikama et al., 8th International Conference on Radioactive Nuclear Beams (RNB8), Grand Rapids, Michigan, USA, May 26-30 (2009).
Primary author
Dr
Toshiyuki Sumikama
(Tohoku University)
Co-authors
Dr
Deuk Soon Ahn
(RIKEN)
Prof.
Didier Beaumel
(IPN Orsay)
Dr
Eiji Ideguchi
(Osaka University)
Dr
Hideaki Otsu
(RIKEN)
Dr
Hiroshi Suzuki
(RIKEN)
Dr
Hiroyuki Takeda
(RIKEN)
Mr
Kunihiko Hasegawa
(Tohoku University)
Dr
Masashi Matsushita
(University of Tokyo)
Dr
Naohito Inabe
(RIKEN)
Dr
Naoki Fukuda
(RIKEN)
Dr
Nobuaki Imai
(University of Tokyo)
Dr
Nori Aoi
(Osaka University)
Dr
Shinichiro Michimasa
(University of Tokyo)
Dr
Takashi Teranishi
(Kyushu University)
Dr
Toshio Kobayashi
(Tohoku University)
Dr
Toshiyuki Kubo
(RIKEN)
Dr
Yohei Shimuzu
(RIKEN)