Abstract
Energy calibration of superheated droplet detector is discussed in terms of the effective recoil nucleus threshold energy and the reduced superheat. This provides a universal energy calibration curve valid for different liquids used in this type of detector. Two widely used liquids, R114 and C4F10, one for neutron detection and the other for weakly interacting massive particles (WIMPs) dark matter search experiment, have been compared. Liquid having recoil nuclei with larger values of linear energy transfer (LET) provides better neutron-γ discrimination. Gamma (γ) response of C4F10 has also been studied and the results are discussed. Behaviour of nucleation parameter with the effective recoil nucleus threshold energy and the reduced superheat have been explored.
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Acknowledgements
The authors sincerely acknowledge Prof. Viktor Zacek, University of Montreal, Canada and Prof. Pijushpani Bhattacharjee, Saha Institute of Nuclear Physics, Kolkata, India for encouragement and useful discussions. Authors are grateful to Prof. B K Chatterjee, Department of Physics, Bose Institute, Kolkata, India, for providing 137Cs gamma source.
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DAS, M., SETH, S. Searching for universal behaviour in superheated droplet detector with effective recoil nuclei. Pramana - J Phys 80, 983–994 (2013). https://doi.org/10.1007/s12043-013-0536-1
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DOI: https://doi.org/10.1007/s12043-013-0536-1