Evaluation of neutron energy spectrum from accelerator neutron source using directional proportional counter and digital pulse processing
Project/Area Number |
23560055
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Applied physics, general
|
Research Institution | Osaka Prefecture University |
Principal Investigator |
MIYAMARU HIROYUKI 大阪府立大学, 工学(系)研究科(研究院), 准教授 (80243187)
|
Project Period (FY) |
2011-04-28 – 2015-03-31
|
Project Status |
Completed (Fiscal Year 2014)
|
Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
|
Keywords | 放射線計測 / 中性子 / 比例計数管 / エネルギースペクトル / デジタル処理 |
Outline of Final Research Achievements |
A special cylindrical proportional neutron counter has been designed and developed to measure neutrons with wide energy range from a few eV to 1 MeV. A lot of thin plastic disks containing boron nitride powder were placed at 1 cm interval inside a counter to make an individual detection volume. Monte Carlo calculations repeated in a design cycle of the detector clarified that a neutron energy spectrum could be estimated by measuring the difference of neutron detection yield at each detection position. Bayesian estimation was employed to evaluate a neutron energy spectrum from the counting rate at each position. Manipulation of a density gradient of boron for each disc changed the instrumental function and reproduced the energy distribution of neutrons around 1 MeV. Combining with Bayesian estimation and the newly developed detector was found to be effective to evaluate neutrons in a wide energy area.
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Report
(5 results)
Research Products
(3 results)