Study of spin-isospin responses of light nuclei near and along the drip line with PANDORA

7 Jun 2018, 09:18
18m
Kunibiki Messe (Matsue)

Kunibiki Messe

Matsue

Oral contribution Session 11

Speaker

Dr Laszlo Stuhl (Center for Nuclear Study, University of Tokyo)

Description

The charge-exchange (p,n) reactions at intermediate beam energies and small angles, can selectively excite Gamow-Teller (GT) states up to high excitation energies in the final nucleus. Therefore, (p,n) reactions in inverse kinematics applying the missing mass reconstruction[1,2] provide the best and efficient tool to study the B(GT) strengths values of unstable isotopes in a wide excitation energy region, without Q-value limitation.
An experimental program aiming to study the spin-isospin responses of light nuclei along the drip line was started at RIKEN RIBF. A measurement [3], SAMURAI-30, with 5 days of beam time was approved to investigate 8He, 11Li and 14Be nuclei. In a pilot measurement of the mentioned experiment at HIMAC facility in Chiba, we studied the Gamow-Teller transitions of 6He in inverse kinematical (p,n) reactions at 123 MeV/nucleon incident energy using polyethylene target. Our new neutron detector, PANDORA [4], with digital readout was also commissioned.
In this talk, details of experiment and the results of B(GT) strengths distribution of 6He will be reported as well as a brief overview of the whole program will be presented.

[1] M. Sasano et al., Phys. Rev. Lett. 107, 202501 (2011).
[2] M. Sasano et al., Phys. Rev. C 86, 034324 (2012).
[3] L. Stuhl et al., RIKEN Accelerator Progress Report 48, 54 (2015).
[4] L. Stuhl et al., Nucl. Instr. Meth. A 866, 164 (2017).

Primary author

Dr Laszlo Stuhl (Center for Nuclear Study, University of Tokyo)

Co-authors

Dr Eiichi Takada (NIRS) Dr Hidetada Baba (RIKEN) Mr JIAN GAO (RIKEN) Dr Juzo ZENIHIRO (RIKEN Nishina Center) Prof. Kentaro Yako (CNS, University of Tokyo) Dr Masaki Sasano (RIKEN Nishina Center) Dr Tomohiro Uesaka (RIKEN Nishina Center) Dr Valerii Panin (RIKEN, Spin-isospin laboratory) Dr Yuki Kubota (RIKEN Nishina Center) Dr Zaihong Yang (RIKEN) Dr Zeren Korkulu (ATOMKI)

Presentation Materials