کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1822327 | 1526353 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Systematic measurement of fast neutron background fluctuations in an urban area using a mobile detection system
ترجمه فارسی عنوان
اندازه گیری سیستماتیک نوسانات سریع نوترون سریع در یک منطقه شهری با استفاده از یک سیستم تشخیص تلفن همراه
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کلمات کلیدی
سریع نوترون تابش پس زمینه، تشخیص منفعل، آشکارسازهای ماتریکس مایع، تشخیص دائمی،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
چکیده انگلیسی
Neutron background measurements using a mobile trailer-based system were conducted in Knoxville, Tennessee, USA. The 0.5Â m2 system, consisting of eight EJ-301 liquid scintillation detectors, was used to collect neutron background measurements in order to better understand the systematic variations in background that depend solely on the street-level measurement position in a downtown area. Data was collected along 5 different streets, and the measurements were found to be repeatable. Using 10-min measurements, the fractional uncertainty in each measured data point was <2%. Compared with fast neutron background count rates measured away from downtown Knoxville, a reduction in background count rates ranging from 10% to 50% was observed in the downtown area, sometimes varying substantially over distances of tens of meters. These reductions are attributed to the net shielding of the cosmic ray neutron flux by adjacent buildings. For reference, the building structure as observed at street level is quantified in part here by a measured angle-of-open-sky metric.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 773, 11 February 2015, Pages 27-32
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 773, 11 February 2015, Pages 27-32
نویسندگان
A. Iyengar, M. Beach, R.J. Newby, L. Fabris, L.H. Heilbronn, J.P. Hayward,