CAJ | 학술논문

在弹性散射实验中，探测器的位置校准是非常重要的。结合兰州放射性束流线(RIBLL)的实际情况，以低能轻炮弹在重靶上的弹性散射截面在前角区为卢瑟福散射的事实为依据，发展了一种简单而有效的位置校准方法。通过蒙特卡洛模拟来检测弹性散射角分布与不同方向上位置未校准时的依赖关系。该方法成功地应用在7 Be与重靶的弹性散射实验中，得到了正确的微分截面角分布。
재탄성산사실험중，탐측기적위치교준시비상중요적。결합란주방사성속류선(RIBLL)적실제정황，이저능경포탄재중파상적탄성산사절면재전각구위로슬복산사적사실위의거，발전료일충간단이유효적위치교준방법。통과몽특잡락모의래검측탄성산사각분포여불동방향상위치미교준시적의뢰관계。해방법성공지응용재7 Be여중파적탄성산사실험중，득도료정학적미분절면각분포。
In a typical nuclear elastic scattering experiment, differential cross section is very sensitive to the scattered angle and therefore the main source of systematic errors come from a millimetric uncertainties in the position measurement of detectors. A method for detector misalignment correction has been successfully applied to the elastic scattering of 7Be on Pb target at Elab=17.9 MeV/u at Radioactive Ion Beam Line in Lanzhou (RIBLL) at Heavy Ion Research Facility in Lanzhou (HIRFL). The correction method is based on the fact that the ratio of elastic scattering and Rutherford cross sections should be independent of scattering angleθ, and equal to unity for very forward angles. A Monte Carlo simulation was performed to examine the angular distribution of cross sections for a given shift of detector position.