It is shown that the results calculated using the ccdwa are agreement with one of the accurate quantum mechanics employing the same potential . quantum mechanical tunneling is important in near threshold, and classical trajectory calculation is not good for prediction of the cross sections . the reaction cross sections calculated using different potentials is different, which show that the investigation of reaction cross section can provide evidence for test of accuracy of the potential energy surface 研究發(fā)現(xiàn):勢(shì)能面相同時(shí)用ccdwa方法計(jì)算的截面和公認(rèn)精確的量子力學(xué)結(jié)果比較符合;閾能附近的量子力學(xué)隧道效應(yīng)較為顯著,準(zhǔn)經(jīng)典彈道方法不能很好的預(yù)言其截面;用不同勢(shì)能面計(jì)算的反應(yīng)截面有差別,說明反應(yīng)截面的研究能為檢驗(yàn)勢(shì)能面的準(zhǔn)確性提供依據(jù)。