Lamb-peak spectrum of the HD (2-0) P(1) line

Diouf, Meissa; Cozijn, F. M. J.; Lai, K.-F.; Salumbides, E. J.; Ubachs, Wim

doi:10.1103/physrevresearch.2.023209

Cited by 24 publications

(20 citation statements)

References 36 publications

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“…The present result agrees with all previous values but shows a much smaller uncertainty. Interestingly, we note that six other measurements of hydrogen vibrational transition frequencies [5,7,8,[12][13][14], covering all three stable isotopologues, show fractional deviations from the theoretical predictions from H2Spectre consistent with the 8.7 × 10 −9 deviation measured here to within experimental uncertainty.…”

supporting

confidence: 86%

“…Because these transitions can be predicted with high precision using ab initio theory, comparisons between theory and experiment can be used to test quantum electrodynamics, search for new forces beyond the standard model, and determine the proton-electron and deuteron-electron mass ratios more precisely [1][2][3][4]. In recent years, many precise measurements of molecular hydrogen transition frequencies have been published [5][6][7][8], with some recent works reporting fractional uncertainties of less than one part-per-billion (ppb, 10 −9 ) on vibrational overtone and electronic transition frequencies [4,[9][10][11][12][13]. Many of these recent experiments (with a few notable exceptions [6,9]) detect infrared absorption by hydrogen in a gas cell.…”

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confidence: 99%

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Sub-ppb Measurement of a Fundamental Band Rovibrational Transition in HD

Fast

Meek

2020

Phys. Rev. Lett.

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We report a direct measurement of the 1-0 Rð0Þ vibrational transition frequency in ground-state hydrogen deuteride (HD) using infrared-ultraviolet double resonance spectroscopy in a molecular beam. Ground-state molecules are vibrationally excited using a frequency comb referenced continuous-wave infrared laser, and the excited molecules are detected via state-selective ionization with a pulsed ultraviolet laser. We determine an absolute transition frequency of 111 448 815 477(13) kHz. The 0.12 parts-perbillion (ppb) uncertainty is limited primarily by the residual first-order Doppler shift.

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confidence: 86%

mentioning

confidence: 99%

Sub-ppb Measurement of a Fundamental Band Rovibrational Transition in HD

Fast

Meek

2020

Phys. Rev. Lett.

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“…1 present the theoretical hyperfine spectrum for this absorption line. Diouf et al [23] measured the P 2 (1) or (0, 1) → (2, 0) absorption line and, employing the line shape analysis mentioned above, obtained the transition frequency 209 784 242 007 (20) kHz. The uncertainty of 20 kHz is more than an order of magnitude smaller than the extent of the hyperfine splitting (ca.…”

Section: R2(1) Transitionmentioning

confidence: 99%

Hyperfine structure in the HD molecule

Komasa

Puchalski²,

Pachucki

2020

Phys. Rev. A

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We investigate interactions between the proton spin, the deuteron spin, and the orbital angular momentum in the electronic ground state of the HD molecule. These interactions lead to hyperfine splittings of molecular energy levels. Our numerical results for the first rotational level agree well with the currently most accurate measurement performed by Ramsey et al. in the 1950s. Knowledge of the hyperfine structure of other levels is necessary for the accurate determination of rovibrational transition energies in spectroscopic measurements. We present theoretical predictions and share the numerical code used to perform numerical calculations. This work sets the ground for high precision spectroscopic tests of hyperfine interactions in molecular systems. In particular we determine the value of the deuteron quadrupole moment Q = 0.2856(2) fm 2 and give outlook for improving its accuracy by three orders of magnitude.

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“…Theoretical studies of the rovibrational structure of the ground electronic state in molecular hydrogen achieve remarkable accuracy in the determined dissociation energy [1][2][3][4][5] and rovibrational energy levels [6][7][8][9][10][11][12]. The progress in the theoretical investigations is enhanced by recent experiments, which aim at the sub-MHz accuracy of both the dissociation energy [13,14] and the rovibrational transition frequencies in the ground electronic state [15][16][17][18][19][20][21][22][23][24][25][26][27]. Comparison between theoretical calculations and accurate measurements can be used as a test for the quantum electrodynamics for molecules [12], determination of the proton-charge radius [1,8,13,14] or even searches for physics beyond Standard Model [28], i.e.…”

Section: Introductionmentioning

confidence: 99%

Hyperfine components of all rovibrational quadrupole transitions in the H$_{2}$ and D$_{2}$ molecules

Jóźwiak,

Cybulski,

Wcisło

2020

Preprint

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We report results of a theoretical investigation of hyperfine interactions in two homonuclear isotopologues of the hydrogen molecule: H 2 and D 2 . We present a set of hyperfine coupling constants: spin-rotation, spin-spin dipole and, in the case of the D 2 molecule, electric quadrupole coupling constants for all bound states of the two isotopologues in their ground electronic X 1 Σ + g state. We provide a list of positions and intensities of 220 997 hyperfine components of 16 079 rovibrational quadrupole transitions of the O, Q and S branches. The positions and intensities of the hyperfine components are necessary for a reliable interpretation of accurate measurements of rovibrational transition frequencies in H 2 and D 2 , which are used for tests of the quantum electrodynamics of molecules and searches for new physics beyond the Standard Model.

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Lamb-peak spectrum of the HD (2-0) P(1) line

Cited by 24 publications

References 36 publications

Sub-ppb Measurement of a Fundamental Band Rovibrational Transition in HD

Sub-ppb Measurement of a Fundamental Band Rovibrational Transition in HD

Hyperfine structure in the HD molecule

Hyperfine components of all rovibrational quadrupole transitions in the H$_{2}$ and D$_{2}$ molecules

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