Inversion ratio in trivalent-iron doped andalusite in the Q and V-bandsReport as inadecuate




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Abstract : Measured values of the inversion ratio I in andalusite Al 2SiO5 : Fe3+ at θ = 90° within the frequency range 35-55 GHz are in the range 1.6-0.6. The frequency dependence of I indicates that the harmonic cross-relaxation markedly reduces the maser properties of andalusite near the frequency 36 GHz. This effect leads to a decrease of I such that maser operation is impossible for range 47-53 GHz at this orientation.

Keywords : aluminium compounds iron masers population inversion andalusite V band inversion ratio Al sub 2 SiO sub 5 :Fe sup 3+ frequency dependence harmonic cross relaxation maser properties maser operation Q band 33 to 55 GHz





Author: V.V. Mishenko N.T. Cherpak

Source: https://hal.archives-ouvertes.fr/



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