JETP, Vol. 45,
No. 1,
p. 106 (January 1977)
(Russian original - ZhETF,
Vol. 72,
No. 1,
p. 203,
January 1977
)
Amplification and generation of coherent phonons in ruby under conditions of spin-level population inversion
E.M. Ganapol'skii, D.N. Makovitskii
Received: April 10, 1976
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