کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9845877 | 1526522 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Light yield improvement in lead tungstate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A new approach to the possibilities of increase in the light yield (LY) of scintillations in lead tungstate (PWO) is discussed. The abrupt LY decrease above 200Â K is connected with the start of rotations of WO4 tetrahedra which disturbs electrostatic separation between non-equilibrium electrons and holes, thus accelerating their non-radiative recombination. The logarithmic decrease of LY with elongation of the crystals is attributed to the capture of the emitted light by a new type of the surface light waves, created during the internal total reflection at the surfaces. Two ways of PWO LY increase are proposed: to retard WO4 tetrahedra rotations and to eliminate the creation of the surface light waves. Two experimental results are attracted to demonstrate the validity of these ways: the relative increase of the light emission at PWO surfaces and LY increase after deposition of transparent quartz coating onto PWO surface, which reduces the internal total reflection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 537, Issues 1â2, 21 January 2005, Pages 177-181
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 537, Issues 1â2, 21 January 2005, Pages 177-181
نویسندگان
Nikolay V. Klassen, Nikolay P. Kobelev, Sergey I. Rybchenko, Semion Z. Shmurak, Ivan M. Shmyt'ko, Vitaliy V. Sinitsyn, Galina K. Strukova,