Refined determination of the muonium-deuterium 1S-2Sisotope shift through improved frequency calibration of iodine lines

Abstract

Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We report a refined determination of muonium 1S-2S transition frequency and its isotope shift with deuterium by recalibrating the iodine reference lines using an optical frequency comb. The reference lines for the muonium and deuterium 1S-2S transitions are determined with a precision of 2.4 × 10 −10 and 1.7 × 10 −10 , respectively. An updated muonium-deuterium 1S-2S isotope-shift frequency is derived from these references to be 11 203 464.9(9.2)(4.0) MHz, in agreement with an updated bound-state quantum-electrodynamics prediction based on 2010 adjustments of Committee on Data for Science and Technology and 2.3 times better in the systematic uncertainty than V. Meyer et al.

Precision Muonium Spectroscopy

“…The measured isotope shift between M and D has been improved recently with a recalibration of the relevant molecular I 2 frequency reference. It is now 106 ∆ν 1s2s (M − D) = 11 203 464.9(10) MHz, in agreement with theory.…”

Absolute frequency atlas from 915 nm to 985 nm based on laser absorption spectroscopy of iodine

“…The resolution and the absolute accuracy of our setup are limited by the accuracy of the wavelength meter. Both can be improved by measuring the laser wavelength with a frequency comb instead of a wavelength meter [26,27] or by dual comb spectroscopy [28]. Conversely, from the known spectral positions of the absorption lines, the CTL laser system in combination with an iodine cell can serve as a synthesizer for optical frequencies with a precision of a few MHz, corresponding to a relative precision of about 1 in 10 8 .…”