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 EM: Nuclear Structure A=6-20 Part II
7:00 PM–9:30 PM,
Thursday, October 25, 2018
Hilton
Room: Queen's 6
Chair: Frederic Sarazin, Colorado School of Mines
Abstract ID: BAPS.2018.HAW.EM.1
Abstract: EM.00001 : Evidence of enhanced nuclear radius of the α halo states via α + 12C inelastic scattering*
7:00 PM–7:15 PM
Presenter:
Makoto Ito
(Department of Pure and Applied Physics, Kansai University)
Authors:
Makoto Ito
(Department of Pure and Applied Physics, Kansai University)
Makoto Nakao
(Department of Pure and Applied Physics, Kansai University)
In light nuclear systems, it is well known that cluster structures appear in excited states. One of characteristic properties in the cluster states is a prominent extension of the nuclear radius. Typical examples are the 02+ and 22+ states in 12C, which have the developed 3α cluster structure. The radii of these states are expected to be more enhanced by about 60 % than the radius of the ground state but the direct measurement of their radius is completely impossible.
In the present study, we focus on the 22+ state and demonstrate that the evidence of the enhanced radius in the 22+ state can be clearly identified in the differential cross section of the α + 12C inelastic scattering. We have performed the microscopic coupled-channel (MCC) calculation for the α + 12C inelastic scattering at the incident energy of E/A= 96.5 MeV.
From the MCC calculation, we have found that the angular distribution of 22+ is prominently shrunk in comparison to the 21+ distribution. This shrinkage structure can be attributed to the enhanced nuclear radius in the 22+ state. In the present report, we will discuss the relation of the nuclear radius and the differential cross section in the 3α final channel.
*This work is supported by Grants-in-Aid for Scientific Research in Japan (No. 17K05454).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.EM.1
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