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Use of Commercial Grade Methane in ASP Counting Instruments
The gas commonly used in the chamber of the Simpson Proportional Alpha Counter (ASP) is the high grade, 99% pure methane. The cost of the gas has often raised the question of finding an adequate substitute and a number of substitutions have been attempted. Commercial methane has been substituted successfully for 99% pure methane and its use is recommended in ASP counters. Neither commercial nor technical methane caused any significant changes in instrument operation.
Date:
October 8, 1953
Creator:
Rasmussen, M. J.
System:
The UNT Digital Library