CAJ | 학술논문

为研究单色器对中子能谱的选择规律，本文利用MCSTAS程序模拟分析了机械速度选择器与晶体单色器几个特征参数对中子能量选择影响。分析结果显示经机械速度选择器单色选择中子注量率要下降1～2个量级，而晶体单色器要下降2～3个量级。因此，对于单色化要求比较高选用晶体单色器，对于实验时间要求较高的选用机械速度选择器。
위연구단색기대중자능보적선택규률，본문이용MCSTAS정서모의분석료궤계속도선택기여정체단색기궤개특정삼수대중자능량선택영향。분석결과현시경궤계속도선택기단색선택중자주량솔요하강1～2개량급，이정체단색기요하강2～3개량급。인차，대우단색화요구비교고선용정체단색기，대우실험시간요구교고적선용궤계속도선택기。
To comprehend the selective rule of monochromator for neutron spectrum , the paper analyzes the effects of several characteristic parameters on neutron energy selection .The simulated results indicate that ve-locity selector could get high neutron flux , whose energy width -broadening becomes larger along with selected neutron peak wavelength , and crystal monochromator could get high energy resolution , whose energy width -broadening becomes narrower along with selected neutron peak wavelength .So it is suggested that crystal mono-chromator can be selected if high energy resolution is required , and mechanical velocity selector can be used if high neutron flux is required .