کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8181686 | 1526446 | 2012 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The response of lead-tungstate scintillators (PWO) to photons with energies in the range 13Â MeV-64Â MeV
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The response of a matrix of 25 lead tungstate (PWO) scintillator detectors, operated at â25 °C, to photons in the range 13 MeV-64 MeV has been measured at the tagged-photon facility at MAX-lab, Lund. The tapered PWO crystals, each with a length of 200 mm and a cross-section of 24.4Ã24.4 mm2 in the front end, read out by 19 mm photomultiplier tubes, were arranged in a 5Ã5 matrix. The response was measured for photons directed towards the centre of the central crystal as well as for photons directed towards the corner of the central crystal, where four crystals meet. The obtained energy resolution surpasses what has been published so far and is close to the limit given by Poisson statistics and escaped energy. For photons directed towards the centre(corner) of the central crystal the relative energy resolution, defined as (FWHM/2.35)/Eγ, decreases from 7.3%(11.0%) at Eγ=13MeV to 3.3%(3.6%) at Eγ=64MeV. The reconstructed point of impact of a photon in this energy range is determined with an uncertainty (one standard deviation) of 7.3±0.1 mm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 679, 1 July 2012, Pages 36-43
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 679, 1 July 2012, Pages 36-43
نویسندگان
K. Marcks von Würtemberg, L. Gerén, O. Lundberg, P.-E. Tegnér, K. Fransson, S. Grape, T. Johansson, E. Thomé, M. Wolke, J. Brudvik, K. Fissum, K. Hansen, L. Isaksson, M. Lundin, B. Schröder,