Radiative lifetime of the A 2Π1/2 state in RaF with relevance to laser cooling

M. Athanasakis-Kaklamanakis*, S. G. Wilkins, P. Lassègues, L. Lalanne, J. R. Reilly, O. Ahmad, M. Au, S. W. Bai, J. Berbalk, C. Bernerd, A. Borschevsky, A. A. Breier, K. Chrysalidis, T. E. Cocolios, R. P. De Groote, C. M. Fajardo-Zambrano, K. T. Flanagan, S. Franchoo, R. F.Garcia Ruiz, D. HanstorpR. Heinke, P. Imgram, Koszorús, A. A. Kyuberis, J. Lim, Y. C. Liu, K. M. Lynch, A. McGlone, W. C. Mei, G. Neyens*, L. Nies, A. V. Oleynichenko, A. Raggio, S. Rothe, L. V. Skripnikov, E. Smets, B. Van Den Borne, J. Warbinek, J. Wessolek, X. F. Yang

*Corresponding author voor dit werk

OnderzoeksoutputAcademicpeer review

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Samenvatting

The radiative lifetime of the AΠ1/22 (v=0) state in radium monofluoride (RaF) is measured to be 35(1) ns. The lifetime of this state and the related decay rate Γ=2.86(8)×107 s-1 are of relevance to the laser cooling of RaF via the optically closed AΠ1/22←Xς1/22 transition, which makes the molecule a promising probe to search for new physics. RaF is found to have a comparable photon-scattering rate to homoelectronic laser-coolable molecules. Owing to its highly diagonal Franck-Condon matrix, it is expected to scatter an order of magnitude more photons than other molecules when using just three cooling lasers, before it decays to a dark state. The lifetime measurement in RaF is benchmarked by measuring the lifetime of the 8P3/2 state in Fr to be 83(3) ns, in agreement with literature.

Originele taal-2English
ArtikelnummerL010802
TijdschriftPhysical Review A
Volume110
Nummer van het tijdschrift1
DOI's
StatusPublished - jul.-2024

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