The 17th CNS International Summer School (CNSSS18)

The study of resonant states in 12C via 12C + nucleon scattering

25 Aug 2018, 15:25

10m

Nishina Hall

poster contribution YSS

Speaker

Yushin Yamada (Kyushu University)

Description

In carbon isotopes, the cluster structure is developed and some excited resonant states regarded as gaslike state of α particles appears. For example, the resonant state called the Hoyle state in ${}^{12}$C is important in the process of the nucleosynthesis. It is very important to study the excited states in ${}^{12}$C including the Hoyle state, especially resonant states. In the previous works, there are many experiments to probe those states. However, not only resonant states, but also non-resonant states are included in the data from the experiments, so we need to get only information of resonant states.

In our study, we analyze ${}^{12}$C + nucleon scattering to understand the effects of the resonant and non- resonant states in ${}^{12}$C. We adapt the complex scaling method (CSM) for the description of the resonant states, and calculate the cross sections with the four-body CDCC method. In the CDCC calculation, we use the JLM potential, which is the optical-model potential and we consider the $0^{+},1^{-},\text{and}{2}^{+}$ states of ${}^{12}$C.

In this conference, we report the results of the breakup cross sections, and discuss the effects of the resonant and non-resonant states in ${}^{12}$C.