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Scintillation and ionization yield for α particles and fission fragments in liquid argon

1987; American Institute of Physics; Volume: 35; Issue: 9 Linguagem: Inglês

10.1103/physreva.35.3956

0556-2791

A. Hitachi, Akira Yunoki, T. Doke, T. Takahashi,

Atomic and Subatomic Physics Research

The scintillation and ionization yields in liquid argon by \ensuremath{\alpha} particles and fission fragments have been measured as a function of the applied electric field (\ensuremath{\le}38 kV/cm). The quenching due to high excitation density does not depend on the field for \ensuremath{\gtrsim}4 kV/cm for \ensuremath{\alpha} particles. The scintillation due to \ensuremath{\alpha} particles shows a maximum at about 1.5 kV/cm. This increase (2.5\ifmmode\pm\else\textpm\fi{}0.7%) of the scintillation at low fields has not been observed heretofore and is ascribed to the presence of a quenching process at zero field.