Maser Amplification of 9.5-Gigahertz Elastic Waves in Sapphire Doped with Divalent Nickel Impurity Ions

Autor:	Peterson, Paul D., Jacobsen, E. H.
Zdroj:	Science, 1969 May . 164(3883), 1065-1067.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1726196