LET dependence of bubble detector response to heavy ions

Radiation Protection Dosimetry
H R AndrewsA R Green

Abstract

A series of experiments have been recently performed at the Heavy Ion Medical Accelerator in Chiba (HIMAC) laboratory to study the response of bubble detectors to high-mass high-energy (HZE) particles. The motivation for this study was to improve our ability to interpret measurements of neutron energy spectra in space. A recent analysis showed that emulsions of light halocarbons display common properties when they are characterised by a quantity called 'reduced superheat'. This quantity evolved from the examination of neutron and gamma responses of many types of detectors. In this study, we describe direct irradiations with N, Ar and Kr charged particles at HIMAC. It was observed that when the linear energy transfer (LET) corresponding to bubble formation was plotted vs. reduced superheat, different curves were obtained for a particular ion for detectors at different temperatures. Different curves were also obtained when data from different ions were plotted. These results confirm that bubble nucleation is not a simple function of particle LET and that an analysis based on track-structure appears warranted.

References


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Citations

Sep 6, 2011·Radiation Protection Dosimetry·B J LewisN Khoshooniy
Sep 18, 2014·Radiation Protection Dosimetry·M B SmithM R Koslowsky
Jul 27, 2006·Radiation Protection Dosimetry·Francesco d'Errico
Sep 22, 2006·Radiation Protection Dosimetry·A R GreenH Ing

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