Gravina, S. and Chishti, N.A. and Di Bernardo, S. and Gianfrani, L. (2024) Comb-assisted Lamb-dip spectroscopy of the mercury intercombination line at 253.7 nm for metrological applications. Il nuovo cimento C, 47 (5). pp. 1-4. ISSN 1826-9885
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Abstract
The saturated absorption spectrum of mercury vapors is measured in coincidence with the 6s21S0 → 6s6p 3P1 intercombination transition at 253.7nm. Coherent radiation in the deep-UV region is produced by means of a double stage of second harmonic generation of a 1014.8nm external cavity diode laser (ECDL) in a pair of nonlinear crystals. The ECDL frequency is tightly locked to the nearest tooth of a self-referenced optical frequency comb synthesizer, traceable to a GPS-disciplined time base signal provided by a Rb-clock. We present the measurement of the pressure-broadening coefficient due to Hg-Hg collisions by analyzing the Lamb-dip profile at different values of the mercury vapor pressure. This study is significant for ongoing experiments that employ the mercury intercombination line for temperature metrology as well as tests of fundamental symmetries.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 10 Jan 2025 11:50 |
| Last Modified: | 10 Jan 2025 11:50 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23306 |
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