کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1824668 1027342 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experiments on high excitation density, quenching, and radiative kinetics in CsI:Tl scintillator
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Experiments on high excitation density, quenching, and radiative kinetics in CsI:Tl scintillator
چکیده انگلیسی

Information on quenching as a function of electron–hole density through the range of 1019 to 2×1020 e–h/cm3 typically deposited towards the end of an electron track has been acquired using 0.5 ps pulses of 5.9 eV light to excite in the band-to-band or high-exciton region of CsI and CsI:Tl. A streak camera records partially quenched luminescence from self-trapped excitons (STE) and excited activators (Tl+⁎). Both the Tl+⁎ and STE luminescence exhibit decreasing light yield versus excitation density Nmax, but it is only the 302 nm STE luminescence that exhibits decay time quenching dependent on Nmax. Fitting the STE decay time data to a model of dipole–dipole quenching yields the time-dependent bimolecular rate constant for quenching of STEs (and Tl+⁎ light yield) in CsI at room temperature: k2(t)=2.4×10−15 cm3 s−1/2 (t−1/2).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 652, Issue 1, 1 October 2011, Pages 284–287
نویسندگان
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