Scintillation and ionization in allene-doped liquid argon irradiated withandions of 30 MeV/u
Authors:
- 1 December 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 54 (22) , 15724-15729
Abstract
The scintillation and ionization yields produced by 33.5 MeV/u and 31.9 MeV/u ions in neat liquid argon and in liquid argon with 10 ppm allene have been measured. Application of an external electric field of about 3 kV/cm leads to an initial enhancement of the scintillation by 17% in the neat liquid and as much as 22% in allene solutions. Scintillation and ionization yields generally are strongly dependent on field strength, they are similar for both ions, and they are usually very different from that found with α particles. Ionization yields are found to increase by more than an order of magnitude with the addition of 10 ppm allene. This increase occurs mainly because of the photoionization of allene by the liquid-argon scintillation. A considerable amount of quenching is observed in these systems and even with the huge increase in ionization allene is not very efficient in converting scintillation to ionic pairs. The potential energy resolution of allene-doped liquid-argon detectors is discussed. © 1996 The American Physical Society.
Keywords
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