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Träfflista för sökning "WFRF:(Van de Borne P) "

Search: WFRF:(Van de Borne P)

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  • Athanasakis-Kaklamanakis, M., et al. (author)
  • Radiative lifetime of the A 2Π1/2 state in RaF with relevance to laser cooling
  • 2024
  • In: PHYSICAL REVIEW A. - 2469-9926 .- 2469-9934. ; 110:1
  • Journal article (peer-reviewed)abstract
    • The radiative lifetime of the A (2)Pi(1/2) (v = 0) state in radium monofluoride (RaF) is measured to be 35(1) ns. The lifetime of this state and the related decay rate Gamma = 2.86(8) . 86(8) x 107 7 s-1 - 1 are of relevance to the laser cooling of RaF via the optically closed A (2)Pi(1/2) <- X (2)Sigma(1/2) 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 8P3/2 P 3 / 2 state in Fr to be 83(3) ns, in agreement with literature.
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  • Udrescu, S. M., et al. (author)
  • Precision spectroscopy and laser-cooling scheme of a radium-containing molecule
  • 2024
  • In: NATURE PHYSICS. - 1745-2473 .- 1745-2481. ; 20:2, s. 193-194
  • Journal article (peer-reviewed)abstract
    • Molecules containing heavy radioactive nuclei are predicted to be extremely sensitive to violations of the fundamental symmetries of nature. The nuclear octupole deformation of certain radium isotopes massively boosts the sensitivity of radium monofluoride molecules to symmetry-violating nuclear properties. Moreover, these molecules are predicted to be laser coolable. Here we report measurements of the rovibronic structure of radium monofluoride molecules, which allow the determination of their laser cooling scheme. We demonstrate an improvement in resolution of more than two orders of magnitude compared to the state of the art. Our developments allowed measurements of minuscule amounts of hot molecules, with only a few hundred per second produced in a particular rotational state. The combined precision and sensitivity achieved in this work offer opportunities for studies of radioactive molecules of interest in fundamental physics, chemistry and astrophysics. Measurements of the rovibronic structure of radium monofluoride molecules allow the identification of a laser cooling scheme. This will enable precise tests of fundamental physics, such as searches for parity or time-reversal symmetry violation.
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  • Result 1-10 of 11

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