Dipole strength distribution in Fe-56

作者：Shizuma T^*; Hayakawa T; Ohgaki H; Toyokawa H; Komatsubara T; Kikuzawa N; Inakura T; Honma M; Nakada H

来源：Physical Review C, 2013, 87(2): 024301.

DOI：10.1103/PhysRevC.87.024301

Electromagnetic dipole transitions in Fe-56 were measured in photon-scattering experiments with a linearly polarized photon beam. The parity quantum numbers of the excited dipole states were determined by the intensity asymmetry of resonantly scattered gamma rays with respect to the polarization plane of the incident photon beam. While the summed magnetic dipole (M1) strength was determined as Sigma B(M1) up arrow = 3.52(17) mu(2)(N) at excitation energies between 7 and 10 MeV, the summed electric dipole (E1) strength below 10 MeV was obtained as Sigma B(E1) up arrow = 78.0(15) x 10(-3) e(2) fm(2). The observed M1 strength was compared with shell-model predictions in the pf shell using the GXPF1J and KB3G effective interactions. In addition, the E1 strength was compared with random-phase approximation calculations with the Skyrme interaction. DOI: 10.1103/PhysRevC.87.024301

• 出版日期2013-2-4