Ionization Quenching Factor Measurement of Helium 4

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dc.creatorSantos, D.
dc.creatorMayet, F.
dc.creatorGuillaudin, O.
dc.creatorLamy, Th.
dc.creatorRanchon, S.
dc.creatorTrichet, A.
dc.creatorColas, P.
dc.creatorGiomataris, I.
dc.date2008-10-07
dc.date.accessioned2026-07-07T10:08:04Z
dc.date.available2026-07-07T10:08:04Z
dc.descriptionThe ionization quenching factor (IQF) is defined as the fraction of energy released by a recoil in a medium through ionization compared with its total kinetic energy. At low energies, in the range of a few keV, the ionization produced in a medium falls rapidly and systematic measurements are needed. We report measurements carried out at such low energies as a function of the pressure in He4 at 350, 700, 1000 and 1300 mbar. In order to produce a nucleus moving with a controlled energy in the detection volume, we have developed an Electron Cyclotron Resonance Ion Source (ECRIS) coupled to an ionization chamber by a differential pumping. The quenching factor of He4 has been measured for the first time down to 1 keV recoil energies. An important deviation with respect to the phenomenological calculations has been found allowing an estimation of the scintillation produced in He4 as a function of pressure. The variation of the IQF as a function of the percentage of isobutane, used as quencher, is also presented.
dc.identifierhttps://arxiv.org/abs/0810.1137
dc.identifierhttp://arxiv.org/abs/0810.1137
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170868
dc.subjectAstrophysics
dc.titleIonization Quenching Factor Measurement of Helium 4
dc.typetext

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