Speaker
Dr
Peter Schury
(RIKEN Nishina Center for Accelerator-Based Science)
Description
A facility for ion trap-based experiments with exotic nuclei produced by fusion-evaporation reaction, particularly aimed at Super Heavy Elements (SHE), has been constructed at RIKEN. At present, the facility consists of a small cryogenic gas cell and a multi-reflection time-of-flight mass spectrograph (MRTOF). Considerations have been made for adding a decay spectroscopy station in the future.
Initial tests of the gas cell have shown that we extract ions of a variety of elements with good efficiency under room temperature operation. With optimized degrader thickness, we have seen more than 30\% efficiency for the long-lived species $^{205}$Fr. We have also seen efficiencies of nearly 20\% for $^{215}$Ac (T$_{1/2}$ = 170 ms) and $^{216}$Th (T$_{1/2}$=26 ms), and more than 10\% for $^{217}$Pa (T$_{1/2}$=3.6 ms). First scientific experiments will be mass measurements via MRTOF, scheduled for early 2015. We will report on the current status and long-term goals of the facility.
Primary author
Dr
Peter Schury
(RIKEN Nishina Center for Accelerator-Based Science)
Co-authors
Dr
Daiya Kaji
(RIKEN Nishina Center for Accelerator-Based Science)
Mr
Fumiya Arai
(RIKEN Nishina Center for Accelerator-Based Science)
Prof.
Hermann Wollnik
(New Mexico State University)
Dr
Kouji Morimoto
(RIKEN Nishina Center for Accelerator-Based Science)
Dr
Michiharu Wada
(RIKEN Nishina Center for Accelerator-Based Science)
Dr
Yuta Ito
(RIKEN Nishina Center for Accelerator-Based Science)
Dr
hiromitsu Haba
(Riken Nishina Center for Accelerator-Based Science)
Prof.
kosuke Morita
(Riken Nishina Center for Accelerator-Based Science)