title: [Pressure control of a pressurized proportional counter for 4 pi beta-gamma coincidence counting--effects of pressure variation and study of a non-flow type system].
abstract: Effects of the pressure variation of counting gas on the efficiency function were examined using a 4 pi beta-gamma coincidence counting system with a pressurized proportional counter. The results showed that the pressure variation of about ten kPa could not give large effects on the efficiency function and that a non-flow type of pressurized proportional counter with a simple gas control system could work well in the case of the pressure higher than 1 MPa, an ordinary pressure for the counting.
mesh_terms: D001610:Beta Particles; D005740:Gases; D011312:Pressure; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods
chemical_list: D005740:Gases