Year: 2011
Type: article
Abstract: We study the resonance spectroscopy of the proton-rich nucleus ${}^{7}$B in the ${}^{4}\mathrm{He}+p+p+p$ cluster model. Many-body resonances are treated under the correct boundary condition as Gamow states using the complex scaling method. We predict five resonances of ${}^{7}$B and evaluate the spectroscopic factors of the ${}^{6}$Be-$p$ components. The importance of the ${}^{6}$Be(${2}^{+}$)-$p$ component is shown in several states of ${}^{7}$B; this is a common feature of ${}^{7}$He, a mirror nucleus of ${}^{7}$B. For only the ground state of ${}^{7}$B, the mixing of the ${}^{6}$Be(${2}^{+}$) state is larger than that of ${}^{6}$He(${2}^{+}$) in ${}^{7}$He, which indicates a breaking of mirror symmetry. This is caused by the small energy difference between ${}^{7}$B and the excited ${}^{6}$Be(${2}^{+}$) state, the origin of which is Coulomb repulsion.
Source: Physical Review C
Authors: Takayuki Myo, Yuma Kikuchi, Kiyoshi Katō
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W180053340