Measurement of the Two-Halo Neutron Transfer Reaction ¹¹Li(p,t)⁹Li at 62.4 MeV

We report the measurement of differential cross section of the ¹¹Li(p,t)⁹Li reaction performed at TRIUMF. Previous investigation of the reaction was reported at lower energy of 3A MeV ^[1]. Present data were taken at higher energy where the direct reaction mechanism is expected to be more dominant. It will be shown that the present measurement shows the transition to a higher excited state than the previous report.

We used the ISAC-II facility to accelerate ¹¹Li to 62.4 MeV and the IRIS facility was used for measuring the ¹¹Li(p,t) reaction. This experimental data were simultaneously taken with the published experiment of (p,p')^[2].

The transition to the second excited state of ⁹Li was observed for the first time. . The presentation will describe the experiment and analysis.

[1] I. Tanihata et al., Phys. Rev. Lett. 100, 192502 (2008).

[2] J. Tanaka et al., Phys. Lett B 774, 268 (2017)