On the empirical dipole polarizability of He from spectroscopy of HeH⁺

2014/10/18 by Dattani, Nikesh S., Puchalski, Mariusz
#80A05 #81-08 #81V10 #81V45 #81V55 #85A99 #Atomic Physics (physics.atom-ph) #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #J.2 #Solar and Stellar Astrophysics (astro-ph.SR)

paper · doi:10.48550/arxiv.1410.4895

Abstract

Using a long-range polarization potential for HeH⁺, we can obtain an empirical value for the Boltzmann constant k_B with an order of magnitude greater precision than the previous best experimental value based on the dipole polarizability of ⁴He. We find that relativistic and QED effects of order α_{\rm FS}³ in the fine structure constant are crucial in the quadrupole polarizability in order to fit the dipole polarizbility with this precision using the polarization potential. By calculating finite-mass corrections for ³He, we also present theoretical values for the dipole and quadrupole polarizabilities of ³He with 9 and 7 digits of precision respectively.

Related

• QED calculation of the dipole polarizability of helium atom
• Measurement of ³He⁺⁺ Polarization at 5.3 MeV via Scattering with an Unpolarized ⁴He Target
• Dipolar corrections to the static magnetic susceptibility of condensed ³He
• Dipole polarizability of the hydrogen molecular ion
• Frequency shifts in the EPR spectrum of ³⁹K due to spin-exchange collisions with polarized ³He and precise ³He polarimetry