Abstract:
The influence of beam drifts on the measurement with silicon strip detector array was discussed, which was characterized by compact structure and large solidangle 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.
下载: