Hyperfine structure and electric quadrupole transitions in the deuterium molecular ion

Abstract

Molecular hydrogen ions are of metrological relevance due to the possibility of precise theoretical evaluation of their spectrum and of external-field-induced shifts. In homonuclear molecular ions the electric dipole $E1$ transitions are strongly suppressed, and of primary laser spectroscopy interest is the electric quadrupole ($E2$) transition spectrum. In continuation of previous work on the H${}_2^{+}$ ion, we report here the results of the calculations of the hyperfine structure of the laser-induced electric quadrupole transitions between a large set of ro-vibrational states of D${}_2^{+}$; the inaccuracies of previous evaluations have been corrected. The effects of the laser polarization are studied in detail. We show that the electric quadrupole moment of the deuteron can in principle be determined with low fractional uncertainty $(\simeq 1\times 10^{-4})$ by comparing the results presented here with future data from precision spectroscopy of D${}_2^{+}$.

arXiv comment19 pages, 4 figures. Comparison with the available experimental data about the hyperfine structure of D2+ has been added in Section IIC; A new Section IIID has been added with a thorough analysis of the determination of the electric quadrupole moment of the deuteron from D2+ spectroscopy; A new Section IIIE has been added discussing further applications of the composite frequency method

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• Laser-stimulated electric quadrupole transitions in the molecular hydrogen ion H2+
• Canceling spin-dependent contributions and systematic shifts in precision spectroscopy of the molecular hydrogen ions
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• Quadrupole transitions in the bound rotational-vibrational spectrum of the deuterium molecular ion
• The hyperfine structure of the hydrogen molecular ion
• Quadrupole transitions in the bound rotational-vibrational spectrum of the hydrogen molecular ion

Cited by in corpus (3)

• Prospects for the determination of fundamental constants with beyond-state-of-the-art uncertainty using molecular hydrogen ion spectroscopy
• Quantum control of a single ${\mathrm{H}}_2^{+}$ molecular ion
• The Stark effect in molecular Rydberg states: Calculation of Rydberg-Stark manifolds of H${}_2$ and D${}_2$ including fine and hyperfine structures