Yi. Zakharov et Vv. Petukhov, BACKGROUND DISCRIMINATION IN PROPORTIONAL-COUNTERS DOPED WITH ACETONEVAPOR, Instruments and experimental techniques, 37(2), 1994, pp. 138-141
Measurements of the discrimination coefficient K(d) of background puls
es by the pulse shape in proportional counters filled with Xe+GeH4 mix
ture (the technique used to detect Ge-71 decays) and with the gas dope
d with acetone are presented. The discrimination coefficient can be in
creased several times by increasing the GeH4 concentration to congruen
t-to 70% or adding about 10 torr of acetone vapor at a GeH4 concentrat
ion of 10-20%. The optimal shaping time is determined.