JETP, Vol. 29,
No. 1,
p. 69 (July 1969)
(Russian original - ZhETF,
Vol. 56,
No. 1,
p. 122,
July 1969
)
Nonresonance Excitation Energy Transfer Between Impurity Rare-earth Ions
I.V. Vasil'ev, G.M. Zverev, G. Ya. Kolodnyi, A.M. Onishchenko
Received: July 25, 1968
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