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Radiation Protection Dosimetry Advance Access originally published online on June 17, 2006
Radiation Protection Dosimetry 2006 120(1-4):491-494; doi:10.1093/rpd/ncj002
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Bubble detector investigations in China

Shi-Lun Guo*

China Institute of Atomic Energy, P.O. Box 275 (96), Beijing 102413, China

* Corresponding author: guosl{at}iris.ciae.ac.cn

Investigation on bubble detectors started in China in 1989. Five types of bubble detectors have been developed, with LET thresholds ranging from 0.05 to 6.04 MeV mg–1 cm2 at 25°C. The neutron response of bubble detectors made with freon-12 has been investigated with mono-energetic neutrons from 20 keV to 19 MeV. Its effective threshold energy for neutron detection is ~100 keV at 28°C. The response above this threshold is ~1.5 x 10–4 (bubble cm–2)/(n cm–2). Bubble detectors are unique not only for neutron dosimetry but also for monitoring and identifying high-energy heavy ions such as cosmic radiation in the space. High-energy heavy ion tracks in large size bubble detectors have been investigated in cooperation with scientists in Japan. The key parameter behind the thresholds of bubble detectors for track registration is the critical rate of energy loss. Three approaches to identify high-energy heavy ions with bubble detectors are suggested.


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