Work

Photodisintegration cross section of Be9 up to 16 MeV in the α + α + n three-body model

Year: 2016

Type: article

Abstract: The photodisintegration of $^{9}\mathrm{Be}$ in the energy region lower than ${E}_{\ensuremath{\gamma}}=16$ MeV is investigated by using the $\ensuremath{\alpha} + \ensuremath{\alpha} + n$ three-body model and the complex scaling method. The cross section exhibits two aspects in two different energy regions. In the low-energy region up to ${E}_{\ensuremath{\gamma}}=6$ MeV, the cross section is explained by the transition strengths into the excited resonant states of $^{9}\mathrm{Be}$, while the dipole transition into the nonresonant continuum states of $^{8}\mathrm{Be}({2}^{+}) + n$ dominates the cross section in the energy region of $6\ensuremath{\le}{E}_{\ensuremath{\gamma}}\ensuremath{\le}16$ MeV. Furthermore, it is shown that the dipole strength at ${E}_{\ensuremath{\gamma}}\ensuremath{\sim}8$ MeV is understood to be caused by the single-neutron excitation from the $^{8}\mathrm{Be}({2}^{+})\ensuremath{\bigotimes} \ensuremath{\nu}{p}_{3/2}$ configuration in the ground state.

Source: Physical Review C

DOI: 10.1103/physrevc.93.054605

Authors: Yuma Kikuchi, Myagmarjav Odsuren, Takayuki Myo, Kiyoshi Katō