Measurement of the infrared absorption spectrum by negative charges in solid helium
Golov A. I., Mezhov-Deglin L. P.
Absorption of infrared radiation by negative charges in solid helium has been observed. The pressure dependence of the line position, and also its width and absorption cross section, have been measured. Experimental confirmation of the existing bubble model of the electron in solid helium has been obtained. The values of various parameters of this model are determined and discussed.