کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1886640 1043544 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fast scintillation processes in CsCl crystals comprising semiconductor nanocrystals
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
Fast scintillation processes in CsCl crystals comprising semiconductor nanocrystals
چکیده انگلیسی

We analyzed the scintillation mechanism in CsCl single crystals comprising CsPbCl3-like semiconductor nanocrystals. A decay component with a subnanosecond lifetime was observed and ascribed to the exciton luminescence in the nanocrystals. This is the first observation of scintillation from semiconductor nanocrystals. In addition, slower components were observed and ascribed to the intraionic transition at isolated Pb2+ ions and the Auger-free luminescence in the CsCl matrix. Furthermore, it was shown that the nanocrystals absorbed and re-emitted the scintillation photons from the isolated Pb2+ ions. The results in this report clearly indicates that the semiconductor nanocrystals function as ultrafast “luminescent centers,” and complicated scintillation dynamics are observed due to the luminescence from different components in the crystal and the radiative energy transfer between them.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 78, Issue 12, December 2009, Pages 1026–1030
نویسندگان
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