Lifetimes of excited states in Rh-

• DOI: 10.48550/arxiv.2404.06222
• Publication Date: 2024-04-09
• Authors: J. Karls; Jon Grumer; Sacha Schiffmann; N. D. Gibson; MingChao Ji; M. K. Kristiansson; D. Leimbach; José E. Navarro N...; Yolimar Rodríguez; R. Ponce; A. Ringvall-Moberg; H. T. Schmidt; S. Spielman; C. W. Walter; Tomas Brage; Dag Hanstorp
• Keywords: Atomic Physics (physics.atom-ph); FOS: Physical sciences; Physics - Atomic Physics

The radiative decay of excited states the negative ion rhodium, Rh$^-$, has been investigated experimentally and theoretically. experiments were conducted at Double ElectroStatic Ion Ring Experiment (DESIREE) facility Stockholm University using selective photodetachment from a stored beam to monitor time evolution state populations. lifetimes Rh$^-$ $^3F_{3}$ $^3F_{2}$ fine structure levels measured be 3.2(6)~s 21(4)~s, respectively. An additional, previously unreported, higher-lying bound mixed $^1D_2+^3P_2+(4d^95s)^1D_2+^3F_2$ composition was observed found have lifetime 10.9(8)s. binding energy this determined in interval $0.1584(2) $ eV < E_b 0.2669(2)$ eV, laser threshold (LPT) spectroscopy. autodetaching with 480(10) microseconds also observed. Theoretical calculations excited-state compositions, energies, magnetic-dipole transition performed multiconfiguration Dirac-Hartree-Fock relativistic configuration interaction methods. calculated are excellent agreement values. present study should provide valuable insights into electron correlation effects ions forbidden transitions.