束流漂移对硅条探测器阵列测量的影响

为研究束流漂移对结构紧凑、覆盖立体角较大的硅条探测器阵列测量的影响，利用蒙特卡罗方法，模拟了不同方向、不同大小的束流漂移对熔合蒸发残余核α衰变和卢瑟福散射角分布的影响，表明束流漂移距离小于3.0 mm时，探测器阵列的对称性能将计数误差控制在10%以下。开展了25 MeV和40 MeV ⁶Li+²⁰⁹Bi体系的实验测量，利用监视器数据研究了束流漂移的情况，结果表明，所有轮次的束流漂移均未超过3.0 mm。对束流漂移进行修正后，用3种不同的立体角刻度方法得到了弹性散射角分布，感兴趣的40 MeV数据与文献数据基本一致。

Influence of Beam Drift on Measurement with Silicon Strip Detector Array

The influence of beam drifts on the measurement with silicon strip detector array was discussed, which was characterized by compact structure and large solid angle coverage. Monte Carlo method was used to simulate the effects of beam drifts in different directions and distances on the angular distribution of the decayed α from the fusion-evaporation residual nuclei and the Rutherford scattering. The results indicate that when the beam drift distance is less than 3.0 mm, the symmetry of the detector array can constrain the count error within 10%. The experimental measurements of ⁶Li+²⁰⁹Bi system at energy of 25 MeV and 40 MeV were performed, and the beam drift was studied using data recorded by the monitor detectors. The results show that the beam drift distances of all runs are less than 3.0 mm. After correcting the beam drifts, the elastic scattering angular distribution at 40 MeV was obtained by three different solid-angle calibration methods, and the result is consistent with the existing data.