کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398740 | 1505894 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low temperature luminescence and charge carrier trapping in a cryogenic scintillator Li2MoO4
ترجمه فارسی عنوان
دامنه ی لومینسانس دمای پایین و شارژر شارژ در یک لیتیوم یو اس 4
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
The luminescence and optical properties of promising cryogenic scintillator Li2MoO4 were studied in the temperature region of 2-300Â K. The data on luminescence spectra and decay characteristics, excitation spectra, thermostimulated luminescence curves and spectra as well as transmission and reflectivity spectra are presented for the single crystals grown by two different procedures, the conventional Czochralski method and the low-temperature gradient Czochralski technique. The bandgap of Li2MoO4 is estimated from the analysis of transmission, luminescence excitation and reflectivity spectra. Up to three luminescence bands with the maxima at 1.98, 2.08 and 2.25Â eV are detected in the emission spectra of crystals and their origin is discussed. In the thermoluminescence curves of both studied crystals, two high-intensity peaks were observed at 22 and 42Â K, which are ascribed to the thermal release of self-trapped charge carriers. The coexistence of self-trapped electrons and holes allows one to explain the poor scintillation light yield of Li2MoO4 at low temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 166, October 2015, Pages 195-202
Journal: Journal of Luminescence - Volume 166, October 2015, Pages 195-202
نویسندگان
D.A. Spassky, V. Nagirnyi, A.E. Savon, I.A. Kamenskikh, O.P. Barinova, S.V. Kirsanova, V.D. Grigorieva, N.V. Ivannikova, V.N. Shlegel, E. Aleksanyan, A.P. Yelisseyev, A. Belsky,