Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session CB: Nuclear Structure A=6-20 Part I
7:00 PM–9:30 PM,
Wednesday, October 24, 2018
Hilton Room: Kohala 1
Chair: Ritu Kanungo, St. Mary's University
Abstract ID: BAPS.2018.HAW.CB.1
Abstract: CB.00001 : Role of α-cluster structure in electric-dipole excitations of 6Li
7:00 PM–7:15 PM
4He (α)-cluster structure often appears in light nuclei, for example, 6Li is well approximated by a three-body model of α + p + n . Recently, the photoabsorption cross sections of 6Li was measured showing two-peak structure . Since the reaction occurs mainly through the electric-dipole (E1) transition, the lower and higher peaks were conjectured as the giant dipole resonance (GDR) of 6Li and the GDR of α cluster in 6Li, respectively. If this conjecture is true, making its excitation mechanism clear is important because it can appear in the nuclei in which an α cluster is well developed.
In this work, we perform a fully microscopic six-body calculation that can take the excitation of α cluster into account. We calculate the E1 transition strengths, E1 transition densities and α-spectroscopic factors in order to discuss the E1 excitation mechanism and the role of α cluster in 6Li.
 W. Horiuchi and Y. Suzuki, Phys. Rev. C 76, 024311 (2007)
 T. Yamagata et al., Phys. Rev. C 95, 044307 (2017)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.CB.1
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