Influence of the Nature of Ionizing Particles on the Specific Luminescence of Organic Scintillators

Abstract

The relationship between the specific luminescence dS/dx of organic scintillators and characteristic quantities of the ionizing particle is investigated. Considering the existence of the two scintillation components and the effect of δ rays, it is shown that dS/dx depends on the specific energy loss dE/dx and on the charge number z of the incident particle: For a given differential energy loss, the ion having the greatest charge number gives rise to the highest light output; for a given particle with increasing dE/dx, the specific luminescence goes through a maximum. The theoretical conclusions are in agreement with experimental results obtained using α particles of 1 to 8 MeV, 3He ions in the energy range 1–3 MeV and protons from 0.3 to 3 MeV. An experimental device is described, which allows a direct measurement of the energy loss ΔE of particles passing through a thin organic scintillator, and of a quantity proportional to the number ΔS of emitted photons.

Light output of Double Chooz scintillators for low energy electrons

“…A first simplification can be made if the contribution of triplet states is negligible. Furthermore, Voltz et al argue that incident electrons do not create secondary electrons with energies high enough to escape the ionization column [18]. In this case F would become zero and (4.5) reduces to…”

Abundances of Ultra-Heavy Galactic Cosmic Rays from the SuperTIGER Instrument

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Polyvinyltoluene scintillators for relative ion dosimetry: An investigation with Helium, Carbon and Neon beams

“…Even if this model is useful to describe the scintillation induced by one kind of ion it is known that the quenching parameter is in fact ion dependant. Indeed, if we attempt to describe the experimental scintillation per ion, using the data obtained with 20 µm scintillator, we find for k B the values given in In order to describe the ion induced scintillation with parameters independent of the ion charge, the BVT model, introduced by Tarlé [14] and Ahlen [15], following the work of Voltz et al [16], suggests introducing the quenching of ionisation energy in the core of the ion track; the specific scintillation is then:…”