Amplification of gamma-radiation with hidden inversion

E. A. Popov

R. N. Shakhmuratov, Gregory Kozyreff, Romain Coussement +2 more

Vasily G. Arkhipkin, Yu. I. Heller

Задерновский Анатолий Андреевич

We discuss a possibility for obtaining the self-amplified spontaneous emission of gamma radiation in an active medium with hidden population inversion of nuclear states. Hidden inversion appears in cooled nuclear ensembles due to assistance of the nuclear recoil in emission and absorption of gamma quanta. Establishing a hidden inversion allows an amplification of gamma radiation to occur in a particular frequency range without excess of the number of excited nuclei over the number of unexcited nuclei. We formulate a set of requirements to the pumping radiation and to the amplifying nuclear medium crucial to the development of gamma-ray lasing.

Willis E. Lamb

Задерновский Анатолий Андреевич

This paper reviews some features of the nuclear electromagnetic transitions accompanied by recoil from the momentum of absorbed or emitted photons. We have presented, based on rigorous quantum mechanical calculations, the cross sections for nuclear anti-Stokes and Rayleigh scattering with recoil. The impact of recoil is critical to the establishing the hidden inversion of nuclear state populations and amplification of stimulated gamma radiation.