DENSITY-DEPENDENCE OF THE CONDUCTION-BAND MINIMUM IN FLUID KRYPTON AND XENON FROM FIELD-IONIZATION OF (CH3)(2)S

The ionization potential distribution of (CH3)(2)S doped in fluid kryp ton and xenon has been determined by means of field ionization in wide density ranges. These distributions are simulated by convoluting the field spectrum of pure (CH3)(2)S With the calculated polarization ener gy distribution of the dopant ion in the media. The density dependence of the conduction-band energy of excess electrons (V-0) in the fluids is obtained from the energy shift between the experimental and simula ted spectra. The resulting V-0 values are compared with previous exper imental results and several theoretical calculations. (C) 1997 America n Institute of Physics.