کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10716056 | 1027430 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The detection of delayed γ-rays between intense bremsstrahlung pulses for discriminating fissionable from non-fissionable materials
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The detection and identification of delayed fission γ-rays emitted between intense bremsstrahlung pulses was investigated as a method to discriminate between fissionable and non-fissionable materials. Photofission and other photonuclear reactions were induced in U238, Pb, Fe and Be targets using a pulsed bremsstrahlung beam for several endpoint energies between 8 and 20MeV. In the 33ms between irradiating pulses, correlated photon energy and time spectra were collected using a high-purity germanium detector. When non-fissionable materials were irradiated, the high-energy γ-ray yield decreased a couple orders of magnitude within the first â¼12ms after the pulse. In contrast, the high-energy γ-rays emitted from the decay of fission fragments were nearly constant throughout the period between bremsstrahlung pulses. Hence, a basic energy and time discrimination provides a unique high-energy delayed γ-ray signature for fissionable material detection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 606, Issue 3, 21 July 2009, Pages 811-815
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 606, Issue 3, 21 July 2009, Pages 811-815
نویسندگان
E.T.E. Reedy, S.J. Thompson, A.W. Hunt,