On radiative nuclear gamma transitions in a Bose—Einstein condensate

The unique properties of radiative nuclear gamma transitions in atoms of a Bose–Einstein condensate, in particular, the efficient suppression of the inhomogeneous broadening of gamma lines related to the translation degrees of freedom of the atoms are theoretically estimated. The effective temperature characterising this broadening proves to be many orders of magnitude lower than the real temperature of the atomic ensemble. The phenomena considered in the paper open up new approaches to the problems of quantum nucleonics, for example, the observation of stimulated gamma radiation of long-lived isomeric nuclei.