16-21 September 2018
CERN
Europe/Zurich timezone

Direct mass measurements of heavy/superheavy nuclei with an MRTOF-MS coupled with the GARIS-II

18 Sep 2018, 16:45
2h
500/1-201 - Mezzanine (CERN)

500/1-201 - Mezzanine

CERN

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Poster Instrumentation for radioactive ion beam experiments Poster Session 2

Speaker

Dr Yuta Ito (RIKEN)

Description

The initial phase of the SHE-Mass project -- precision mass measurements of superheavy nuclei with a multi-reflection time-of-flight mass spectrograph (MRTOF-MS) coupled with the gas-filled recoil ion separator GARIS-II -- has successfully been carried out. In a series of the experiments, masses of a wide variety of heavy/superheavy nuclei have been measured [1,2,3]. In particular, masses of mendelevium ($Z=101$) isotopes in the vicinity of the $N=152$ deformed neutron shell closure have been directly measured for the first time [3]. For the project, dedicated experimental devices to produce low-energy ion beams such as a cryogenic gas catcher and ion traps and sophisticated measurement scheme for the MRTOF-MS have also been developed. The details for the measurements and developments will be presented.

[1] P. Schury et al., Phys. Rev. C 95 (2017) 011305
[2] M. Rosenbusch et al., Phys. Rev. C (submitted)
[3] Y. Ito et al., Phys. Rev. Lett. (accepted)

Primary author

Dr Yuta Ito (RIKEN)

Co-authors

Dr Peter SCHURY (KEK, WNSC) Prof. Michiharu WADA (KEK, WNSC) Mr Fumiya Arai (Univ. of Tsukuba) Dr Hiromitsu Haba (RIKEN) Dr Yoshikazu HIRAYAMA (KEK, WNSC) Mr Satoshi Ishizawa (Yamagata Univ.) Dr Daiya Kaji (RIKEN) Dr Sota KIMURA (RIKEN) Dr Hiroyuki Koura (JAEA) Prof. Marion MacCORMICK (IN3P3) Prof. Hiroari MIYATAKE (KEK, WNSC) Dr JunYoung MOON (IBS) Dr Koji Morimoto (RIKEN) Prof. Kosuke Morita (Kyushu Univ.) Dr Momo MUKAI (Univ. of Tsukuba) Mr Ian Murray (RIKEN) Mr Toshitaka Niwase (Kyushu Univ.) Prof. Kunihiro Okada (Sophia Univ.) Prof. Akira Ozawa (Univ. of Tsukuba) Dr Marco Rosenbusch (RIKEN) Dr Aiko Takamine (RIKEN) Mr Taiki Tanaka (Kyushu Univ.) Dr Yutaka WATANABE (KEK, WNSC) Prof. Hermann Wollnik (New Mexico State Univ.) Dr Sayaka Yamaki (Saitama Univ.)

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