SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 32: Structure and Dynamics of Nuclei VI
HK 32.2: Vortrag
Mittwoch, 22. März 2023, 14:15–14:30, SCH/A215
Proton-neutron interaction strength studies via accurate mass measurements far from stability — •Gabriella Kripkó-Koncz for the FRS Ion Catcher collaboration — Justus-Liebig-Universität Gießen, Gießen, Germany — Tel Aviv University, Tel Aviv, Israel
The average interaction strength between the last (highest energy orbitals) proton(s) and neutron(s) in a nucleus (denoted as δ Vpn), may be derived from differences of accurate atomic masses, and in turn point empirically to various aspects of nuclear structure and interactions. The FRS Ion Catcher experiment at the in-flight fragment separator FRS at GSI enables highly accurate direct mass measurements (δ m/m ∼ 10−8) with thermalized projectile and fission fragments by combining a cryogenic stopping cell and a multiple-reflection time-of-flight mass spectrometer. Confirmed by mass measurements at the FRS Ion Catcher, the detailed structure of δ Vpn along the N=Z, N−Z=2, N−Z=4 lines near the Z=29−37 region has been investigated [1]. These studies will be presented and an analysis of mass measurements via higher-order mass-difference indicators, the deviations of which from their expected trends may indicate questionable mass values in the Atomic Mass Evaluation and highlight distinctive nuclear structure effects, will be motivated.
[1] I. Mardor et al., Phys. Rev. C 103, 034319 (2021)