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光学模型是在核数据计算和评价中所使用的最重要的理论之一。光学模型的计算结果主要取决于它的模型势参数。于是选择和调整光学模型势参数成为核数据计算的关键步骤。APMN是自动获得300 MeV以下能区光学模型势参数的程序,它适用于非裂变的中重靶核和轻入射粒子n,p,d,t,3He和α。 在该程序中光学模型势参数是利用改进的最速下降法根据实验数据得到的,所得到的一组光学模型势参数可适用于1个核,也可适用于多个(上限为40)核。
Optical models are one of the most important theories used in the calculation and evaluation of nuclear data. The calculation of the optical model depends mainly on its model potential parameters. Therefore, selecting and adjusting the optical model potential parameters becomes the key step in nuclear data calculation. APMN is a program that automatically obtains the potential parameters of optical models below 300 MeV for non-fissile, medium-heavy targets and light-incident particles n, p, d, t, 3He and α. In this program, the optical model potential parameters are obtained by using the steepest descent method based on the experimental data. The obtained set of optical model potential parameters can be applied to one core, and also to multiple (upper limit of 40) nuclei.