Temperature Dependence of Decay Time and Intensity of Alpha Pulses in Pure and Thallium-Activated Cesium Iodide
- 1 August 1962
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 33 (8) , 819-822
- https://doi.org/10.1063/1.1717979
Abstract
The intensity and decay time of Po210 alpha particle scintillations produced in pure and thallium‐activated cesium iodide have been measured with a fast electronic system as a function of temperature down to 77°K. Three modes of decay due to alpha excitation have been observed for CsI(Tl), and two for CsI. Other than the 7‐ and 0.55‐μsec modes (at room temperature) reported in the literature for CsI(Tl), an additional temperature‐independent mode of about 1.3 μsec has been detected between 77 and 150°K. In CsI a fast temperature‐dependent mode of decay (≈100 nsec) was observed between 100–200°K in addition to the known principal mode.Keywords
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