Lifetimes of excited states in Rh-
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917635047817216 |
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| author | Karls, J. Grumer, J. Schiffmann, S. Gibson, N. D. Ji, M. Kristiansson, M. K. Leimbach, D. Navarrete, J. E. Navarro Rodrıguez, Y. Pena Ponce, R. Ringvall-Moberg, A. Schmidt, H. T. Spielman, S. E. Walter, C. W. Brage, T. Hanstorp, D. |
| author_facet | Karls, J. Grumer, J. Schiffmann, S. Gibson, N. D. Ji, M. Kristiansson, M. K. Leimbach, D. Navarrete, J. E. Navarro Rodrıguez, Y. Pena Ponce, R. Ringvall-Moberg, A. Schmidt, H. T. Spielman, S. E. Walter, C. W. Brage, T. Hanstorp, D. |
| contents | The radiative decay of excited states of the negative ion of rhodium, Rh$^-$, has been investigated experimentally and theoretically. The experiments were conducted at the Double ElectroStatic Ion Ring Experiment (DESIREE) facility at Stockholm University using selective photodetachment from a stored ion beam to monitor the time evolution of the excited state populations. The lifetimes of the Rh$^-$ $^3F_{3}$ and $^3F_{2}$ fine structure levels were measured to be 3.2(6)~s and 21(4)~s, respectively. An additional, previously unreported, higher-lying bound state of mixed $^1D_2+^3P_2+(4d^95s)^1D_2+^3F_2$ composition was observed and found to have a lifetime of 10.9(8)s. The binding energy of this state was determined to be in the interval $0.1584(2) $ eV $ < E_b < 0.2669(2)$ eV, using laser photodetachment threshold (LPT) spectroscopy. An autodetaching state with a lifetime of 480(10) microseconds was also observed. Theoretical calculations of the excited-state compositions, energies, and magnetic-dipole transition lifetimes were performed using the multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction methods. The calculated lifetimes of the $^3F_{3}$ and $^3F_{2}$ fine structure levels are in excellent agreement with the measured values. The present study should provide valuable insights into electron correlation effects in negative ions and forbidden radiative transitions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_06222 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Lifetimes of excited states in Rh- Karls, J. Grumer, J. Schiffmann, S. Gibson, N. D. Ji, M. Kristiansson, M. K. Leimbach, D. Navarrete, J. E. Navarro Rodrıguez, Y. Pena Ponce, R. Ringvall-Moberg, A. Schmidt, H. T. Spielman, S. E. Walter, C. W. Brage, T. Hanstorp, D. Atomic Physics The radiative decay of excited states of the negative ion of rhodium, Rh$^-$, has been investigated experimentally and theoretically. The experiments were conducted at the Double ElectroStatic Ion Ring Experiment (DESIREE) facility at Stockholm University using selective photodetachment from a stored ion beam to monitor the time evolution of the excited state populations. The lifetimes of the Rh$^-$ $^3F_{3}$ and $^3F_{2}$ fine structure levels were measured to be 3.2(6)~s and 21(4)~s, respectively. An additional, previously unreported, higher-lying bound state of mixed $^1D_2+^3P_2+(4d^95s)^1D_2+^3F_2$ composition was observed and found to have a lifetime of 10.9(8)s. The binding energy of this state was determined to be in the interval $0.1584(2) $ eV $ < E_b < 0.2669(2)$ eV, using laser photodetachment threshold (LPT) spectroscopy. An autodetaching state with a lifetime of 480(10) microseconds was also observed. Theoretical calculations of the excited-state compositions, energies, and magnetic-dipole transition lifetimes were performed using the multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction methods. The calculated lifetimes of the $^3F_{3}$ and $^3F_{2}$ fine structure levels are in excellent agreement with the measured values. The present study should provide valuable insights into electron correlation effects in negative ions and forbidden radiative transitions. |
| title | Lifetimes of excited states in Rh- |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2404.06222 |