294MeV^(20)Ne+^(159)Tb反应中出射α粒子的研究

Investigation of the α particles in the Reaction of 294 MeV ^(20)Ne+^(159)Tb

在294MeV Ne束轰击Tb靶的反应中,用△E-E望远镜测量了10°—150°发射的α粒子能谱,并用运动源模型拟合了所得的实验能谱,得到与前角度源、中等速度源、熔合蒸发源的有关参数。计算谱很好地复现了实验能谱的形状、峰位及数值,角分布也得到极好的模拟。实验所得的发射α粒子截面为3300mb,运动源模型计算值为3700mb。

294 MeV Ne Beam has bombarded Tb target. The energy spectra of emitted α particles have been measured at the angles of 10°-150° us ng △E-E telescopes and analyzed by means of three moving source models. The parameters associated with fast source, intermediate source and fusion evaporation source have been obtained. The shape, the peak value and the magnitude of the experimental spectrum have been reproduced by theoretical calculations. Moreover, the angular distribution of α particle has been also fitted very well. The experimental cross section of emitted a particles is 3300 mb and the correspondent theoretical value by moving source model is 3700 mb.