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| Study on Discriminating 212Po α particle by Using Ordinary Aluminum Foil Absorber |
| XU Jia-ang, LI Quan-tai, CHEN Ying-min, et al |
| Institute of Radiation Medicine, Shandong Academy of Medicine Sciences, Jinan 250062 China |
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Abstract Objective An absorber material of discriminating 212Po 8.78MeV α particle was developed by using ordinary aluminum foil instead of special absorber.Methods Deposition rate detectors with different mass thickness aluminum foil were exposed in the self-made 222Rn Chamber and 220Rn Chamber with the same exposure time.The suitable mass thickness aluminum foil for discriminating 212Po 8.78MeV α particle was selected after CR-39 were etched, and was tested for discriminating 212Po 8.78MeV α particle, which compared with the absorbing composite materials made by the United States.Results Through analysis on these experimental data, the absorbing law of discriminating different energy α particle by using ordinary aluminum foil was obtained.The discriminating performance of the self-made combined aluminum foil absorber for decay products of 222Rn/220Rn is superior to that of the American-made absorbers using in Japan.Conclusion The self-made CAFA can be used for discriminating 8.78MeV α particle determination.
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Received: 24 March 2010
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