Alpha Particle Energy Resolution in a Liquid Scintillator

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Abstract
The resolution of alpha particles of different energies with a liquid scintillator system has been studied for alpha particle energies of 4–7 MeV. In this work the best obtained value of the energy spread, the full width at half‐maximum, of the pulse height distributions was 0.058 times the energy of the exciting alpha particle. The pulse height‐energy relation for alpha particles between 4 and 7 MeV was shown to be essentially linear but not directly proportional. The quenching effects of ethyl alcohol and di(2‐ethylhexyl) phosphoric acid were measured. The linewidth and relative pulse height response of the liquid scintillator system for alpha particle excitation were studied as a function of the height and cross sectional area of the sample.