Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-11-03
Phys.Rev.Lett.106:162501,2011
Physics
Nuclear Physics
Nuclear Theory
4 pages, 2 figures
Scientific paper
10.1103/PhysRevLett.106.162501
A possibility of amplification of the 7.6 eV $\gamma$-radiation by the stimulated $\gamma$-emission of the ensemble of the $^{229m}$Th isomeric nuclei in a host dielectric crystal is proved theoretically. This amplification is a result of: 1) the excitation of a large number of the $^{229m}$Th isomers by laser radiation; 2) the creation of the inverse population of nuclear levels in a cooled sample owing to the interaction of thorium nuclei with the crystal electric field or with an external magnetic field; 3) the emissions/absorption of the optical photons by thorium nuclei in the crystal without recoil; 4) the nuclear spin relaxation through the conduction electrons of the metallic covering.
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