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Radiative lifetime of the A Π 1 / 2 2 state in RaF with relevance to laser cooling

Journal Article · · Physical Review A
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The radiative lifetime of the A Π 1 / 2 2 ( 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 ) × 10 7 s 1 are of relevance to the laser cooling of RaF via the optically closed A Π 1 / 2 2 X Σ 1 / 2 2 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 8 P 3 / 2 state in Fr to be 83(3) ns, in agreement with literature.

Published by the American Physical Society 2024
Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0021176
OSTI ID:
2406098
Alternate ID(s):
OSTI ID: 2578973
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 110; ISSN PLRAAN; ISSN 2469-9926
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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