Energies and lifetimes of the 9p and 10p excited states in atomic francium
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2026
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| author | Lassègues, P. Ajayakumar, A. Athanasakis-Kaklamanakis, M. Ahmad, O. Au, M. Berbalk, J. Bettaney, D. Borne, B. van den Chakraborty, A. Cocolios, T. E. Duggan, M. Fajardo, C. Flanagan, K. T. Ruiz, R. F. Garcia de Groote, R. Gonzalez-Acevedo, D. Kastberg, A. Koszorús, A. Lalanne, L. Lynch, K. M. McLeroy, D. T. McGlone, A. Neyens, G. Nies, L. Quanjel, L. Raggio, A. Reilly, J. Sahoo, B. K. Snikeris, J. Warbinek, J. Wilkins, S. G. Yang, X. F. |
| author_facet | Lassègues, P. Ajayakumar, A. Athanasakis-Kaklamanakis, M. Ahmad, O. Au, M. Berbalk, J. Bettaney, D. Borne, B. van den Chakraborty, A. Cocolios, T. E. Duggan, M. Fajardo, C. Flanagan, K. T. Ruiz, R. F. Garcia de Groote, R. Gonzalez-Acevedo, D. Kastberg, A. Koszorús, A. Lalanne, L. Lynch, K. M. McLeroy, D. T. McGlone, A. Neyens, G. Nies, L. Quanjel, L. Raggio, A. Reilly, J. Sahoo, B. K. Snikeris, J. Warbinek, J. Wilkins, S. G. Yang, X. F. |
| contents | We present the first measurement of 9p 2P1/2,3/2 and 10p 2P1/2,3/2 excited levels absolute wavenumbers and radiative lifetime in francium. We used the Collinear Resonance Ionization Spectroscopy (CRIS) technique, applied on a beam of 221Fr atoms. Prior to this work, no experimental data existed for francium p-states with n > 8. The results provide a precision experimental test of relativistic coupled-cluster theory for the heaviest alkali, showing good agreement for lifetimes and relative excitation energies, despite a residual global offset in absolute energies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_12467 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Energies and lifetimes of the 9p and 10p excited states in atomic francium Lassègues, P. Ajayakumar, A. Athanasakis-Kaklamanakis, M. Ahmad, O. Au, M. Berbalk, J. Bettaney, D. Borne, B. van den Chakraborty, A. Cocolios, T. E. Duggan, M. Fajardo, C. Flanagan, K. T. Ruiz, R. F. Garcia de Groote, R. Gonzalez-Acevedo, D. Kastberg, A. Koszorús, A. Lalanne, L. Lynch, K. M. McLeroy, D. T. McGlone, A. Neyens, G. Nies, L. Quanjel, L. Raggio, A. Reilly, J. Sahoo, B. K. Snikeris, J. Warbinek, J. Wilkins, S. G. Yang, X. F. Atomic Physics We present the first measurement of 9p 2P1/2,3/2 and 10p 2P1/2,3/2 excited levels absolute wavenumbers and radiative lifetime in francium. We used the Collinear Resonance Ionization Spectroscopy (CRIS) technique, applied on a beam of 221Fr atoms. Prior to this work, no experimental data existed for francium p-states with n > 8. The results provide a precision experimental test of relativistic coupled-cluster theory for the heaviest alkali, showing good agreement for lifetimes and relative excitation energies, despite a residual global offset in absolute energies. |
| title | Energies and lifetimes of the 9p and 10p excited states in atomic francium |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2604.12467 |