Hyperfine structure of the first rotational level in H2, D2 and HD molecules and the deuteron quadrupole moment
Abstract
We perform the four-body calculation of the hyperfine structure in the first rotational state J=1 of the H2, D2, and HD molecules and determine the accurate value for the deuteron electric quadrupole moment Qd = 0.285\,699(15)(18) fm2 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 Qd 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.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.