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  Assessing the time constancy of the proton-to-electron mass ratio by precision ro-vibrational spectroscopy of a cold molecular beam

Santamaria, L., Sarno, V. D., Ricciardi, I., Mosca, S., Rosa, M. D., Santambrogio, G., et al. (2014). Assessing the time constancy of the proton-to-electron mass ratio by precision ro-vibrational spectroscopy of a cold molecular beam. Journal of Molecular Spectroscopy, 300, 116-123. doi:10.1016/j.jms.2014.03.013.

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 Creators:
Santamaria, L.1, Author
Sarno, V. Di1, Author
Ricciardi, I.1, Author
Mosca, S.1, Author
Rosa, M. De1, Author
Santambrogio, Gabriele2, 3, Author              
Maddaloni, P.1, Author
Natale, P. De4, 5, Author
Affiliations:
1CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, 80078 Pozzuoli, Italy, ou_persistent22              
2Molecular Physics, Fritz Haber Institute, Max Planck Society, ou_634545              
3CNR-INO, Istituto Nazionale di Ottica, Via N. Carrara 1, 50019 Sesto Fiorentino, Italy, ou_persistent22              
4NFN, Istituto Nazionale di Fisica Nucleare - Sez. di Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino, Italy, ou_persistent22              
5CNR-INO, Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy, ou_persistent22              

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Free keywords: Proton-to-electron mass ratio; Buffer gas cooling; Two-photon Ramsey spectroscopy
 Abstract: We report the design of an experiment that aims to constrain, over a-few-year timescale, the fractional temporal variation of the proton-to-electron mass ratio, β=mp/me, at a level of 10-15/yr by means of a spectroscopic frequency measurement on a beam of cold CF3H molecules. This is extracted from a buffer-gas-cooling source and then collimated by means of an electrostatic hexapole lens. Employed in a two-photon Ramsey-fringes interrogation scheme, the probe source is based on a mid-infrared quantum cascade laser, phase-locked to a specially-developed optical frequency comb that is ultimately referenced to the Cs primary standard via an optical fiber link.

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Language(s): eng - English
 Dates: 2014-03-172014-01-172014-04-012014-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.jms.2014.03.013
 Degree: -

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Title: Journal of Molecular Spectroscopy
  Other : JMS
  Abbreviation : J. Mol. Spectrosc.
Source Genre: Journal
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Publ. Info: Elsevier B. V.
Pages: - Volume / Issue: 300 Sequence Number: - Start / End Page: 116 - 123 Identifier: ISSN: 0022-2852
CoNE: https://pure.mpg.de/cone/journals/resource/954922646043