Energy dependence of gamma detection efficiency for SED R-12

Sarkar, Rupa; Chatterjee, B.; Roy, S.C.

doi:10.1016/j.nima.2009.11.030

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“…When the droplet is in the normal metastable state (N), it has much longer lifetime than when it is in the second metastable state (S). These two states were observed for various superheated liquids when irradiated with neutrons and gamma rays [8,14,15].…”

Section: Theorymentioning

confidence: 84%

Study of gamma ray response of R404A superheated droplet detector using a two-state model

Mondal¹,

Chatterjee²

2013

Applied Radiation and Isotopes

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The superheated droplet detector (SDD) is known to be gamma ray insensitive below a threshold temperature which made them excellent candidates for neutron detection in the presence of gamma rays. Above the threshold temperature, the gamma ray detection efficiency increases with increase in temperature. In this work the gamma ray threshold temperature has been studied for SDD using R404A as the active liquid and is compared to the theoretical prediction. The temperature variation of gamma ray detection efficiency and interstate transition kinetics has also been studied using a two-state model. The experiments are performed at the ambient pressure of 1 atm and in the temperature range of 17-32 °C using a 662 keV (1)(37)Cs gamma ray source.

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Section: Theorymentioning

confidence: 84%