Scintillation volume,as well as quench,is an important factor in change of counting efficiency for liquid scintillation counting(LSC).Various representative radionuclides have been determined in two liquid scintillation counters,with the discrimination between the influence of scintillation volume and that of quench.The influence of scintillation volume is very little on the counting efficiency ofαparticles or high energyβparticles.The wall effect resulting from small scintillation volume changes the shape ...