arXiv:2010.06888·v2·physics.chem-ph

Hyperfine structure of the first rotational level in H $_{2}$ , D $_{2}$ and HD molecules and the deuteron quadrupole moment

Mariusz Puchalski · Jacek Komasa · Krzysztof Pachucki

We perform the four-body calculation of the hyperfine structure in the first rotational state $J = 1$ of the H $_{2}$ , D $_{2}$ , and HD molecules and determine the accurate value for the deuteron electric quadrupole moment $Q_{d} = 0.285 699 (15) (18)$ fm $^{2}$ in significant disagreement with former spectroscopic determinations. Our results for the hyperfine parameters agree very well with the currently most accurate molecular-beam magnetic resonance measurement performed several decades ago by N.F. Ramsey and coworkers. They also indicate the significance of previously neglected nonadiabatic effects. Moreover, a very good agreement with the recent calculation of $Q_{d}$ based on the chiral effective field theory, although much less accurate, indicates the importance of the spin dependence of nucleon interactions in the accurate description of nuclei.

Comments: 6 pages, 1 figure, improved numerics

Hyperfine structure of the first rotational level in H2​, D2​ and HD molecules and the deuteron quadrupole moment

Abstract

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Hyperfine structure of the first rotational level in H $_{2}$ , D $_{2}$ and HD molecules and the deuteron quadrupole moment

Citation historyopen in Citation History ↗