Nuclear recoil correction to the hyperfine splitting in atomic systems

Abstract

A general quantum electrodynamic method for derivation of nuclear recoil corrections in hydrogenic systems, which are exact in the nuclear charge parameter Z α, is introduced. The exemplary derivation is presented for the O(m/M ) nuclear pure recoil correction to the hyperfine splitting. The obtained result is verified by comparison to the known (Z α) 5 contribution.

Nuclear polarizability effects in $^3$He$^+$ hyperfine splitting

“…Zemach radius obtained in Ref. [10] from the electronscattering data yields r Z − r Z = 0.072 (18) fm. We interpret this difference as the effect of the nuclear polarizability.…”