Luminescence response of CsI:Na to electron pulse irradiation |
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| Institution: | 1. Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634034, Russian Federation;2. Institute for Scintillation Materials, 60 Lenin Avenue, Kharkov 61001, Ukraine;1. College of Resources and Environmental Science, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China;2. State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University, Chongqing 400044, PR China;1. iSMART, Qingdao University of Technology, Qingdao, 266033, PR China;2. Center for Durability & Sustainability Studies of Shandong Province, Qingdao University of Technology, Qingdao, 266033, PR China;3. State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an, 710048, Shaanxi, China;4. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, PR China;1. Division of Cardiovascular Diseases and Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota;2. Division of Cardiology, Baystate Medical Center, Springfield, Massachusetts;3. Clinical and Translational Science Institute, Tufts University School of Medicine, Boston, Massachusetts;1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, PR China;2. Department of Pharmaceutical Engineering, School of Life and Health Sciences, Huzhou College, Huzhou 313000, PR China;3. Department of Chemistry, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, PR China;4. Department of Polymer Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, PR China |
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| Abstract: | This paper investigates the influence of activator concentration and temperature on the scintillation process in CsI:Na crystal which was excited by a pulsed electron beam (Eex = 0.25 MeV, t1/2 = 15 ns, W = 0.003…0.16 J/cm2) at temperature within 77–300 K. It has been established that the transition of Na-bound two halide exciton from singlet state causes 3 eV emission of CsI:Na. The capturing of Vk by Na+ ion determines the scintillation pulse shape. Thermal liberation of Vk from VkA centers results in an inertial rise of the emission pulse in lightly activated CsI:Na and in a mono-exponential decay of the emission pulse in heavily activated CsI:Na. The value of thermal dissociation energy of VkA centers is 0.24 ± 0.01 eV, which was obtained from the temperature dependences of the emission decay time constant for CsI:2.8?10?3%Na and of the rise time constant for CsI:2.0?10?4%Na. |
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