Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session C10: Nuclear Structure I
7:00 PM–9:15 PM,
Tuesday, November 28, 2023
Hilton Waikoloa Village
Room: Kohala 3
Chair: Riccardo Orlandi, JAEA, ASRC
Abstract: C10.00007 : Neutron distribution of 208Pb by low-energy electron scattering
8:30 PM–8:45 PM
Presenter:
Rika Danjo
Author:
Rika Danjo
Collaborations:
ULQ2, LEEP
Recently, it was pointed out theoretically that the 4th moment of the charge density distribution, <rc4>, contains the information of neutron-distribution radius (ref.[1]).
The experimental determination of <rc4> can be carried out with two methods: 1) <rc4> is derived from the integration of the charge density distribution ρ(r), which is the Fourier transform of F(q) (where q is the momentum transfer) measured from elastic electron scattering, and 2) the Taylor expansion of F(q) in the low-q region.
The neutron radius of 208Pb, whose charge density is the most precisely known, has been extracted from <rc4> following the method 1) (ref.[2]) , and has been found to be consistent with the parity-violating electron scattering results performed out at JLab.
We are currently conducting the method 2) to extract <rc4> from the elastic cross section of 208Pb to be measured covering the momentum transfer range q2 = 0.0025 - 0.065 (MeV/c)2 with low-energy electron-scattering. The required precision for the cross section is the order of 10⁻³ to determine the neutron-distribution radius accurately.
I will discuss the current status and perspectives of this project.
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