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=Date and Place=
Jan. 21st(Thu), 13:30~ via ZOOM meeting system
=Lecturer=
Prof. Wataru Horiuchi
(Department of Physics., Faculty of Science, Hokkaido University)
=Title=
Utility of antiproton- and deuteron-scattering for studies of unstable nuclei
=Abstract=
In this talk, I will present our recent works related to the nuclear radii. Properties of the antiproton and deuteron probes are investigated based on the high-energy microscopic theory, Glauber formalism.
(i)Nuclear density distributions are basic properties of atomic nuclei. In addition to traditional electron scattering, hadronic probes have been used to study the matter density distributions, especially, via proton-nucleus scattering. Recently, we proposed a practical way for extracting the nuclear surface diffuseness of unstable nuclei using the proton-nucleus elastic scattering differential cross sections [1]. As a natural extension of the previous study, we investigate antiproton-nucleus scattering and show that the antiproton has much stronger sensitivity to the dilute density distribution at the nuclear surface than that of the proton probe [2].
(ii) The total reaction or interaction cross section measurement has been used as a standard tool to determine the nuclear radii of unstable nuclei. The total reaction cross section on a proton target is known to have strong incident energy dependence, which can be used to deduce both the neutron and proton radii [3,4]. A neutron target may also be useful for the structure study of the unstable nuclei but no neutron target exists. Since the deuteron consists of neutron and proton, the total reaction cross section on a deuteron target must include both information on the nucleus-neutron and the nucleus-proton scattering profiles. We show the nucleus-deuteron cross sections are well described by the Glauber formalism and discuss the utility of the high-energy nucleus-deuteron scattering for studying the nuclear radii [5].
References：[1] S. Hatakeyama, W. Horiuchi, and A. Kohama, Phys. Rev. C 97, 054607 (2018), [2] K. Makiguchi, W. Horiuchi, and A. Kohama, Phys. Rev. C 102, 034614 (2020), [3] W. Horiuchi, Y. Suzuki, and T. Inakura, Phys. Rev. C 89, 011601(R) (2014), [4] W. Horiuchi, S. Hatakeyama, S. Ebata, and Y. Suzuki, Phys. Rev. C 93, 044611 (2016), [5] W. Horiuchi, Y. Suzuki, T. Uesaka, and M. Miwa, Phys. Rev. C 102, 054601 (2020).