童楚楚+張正軍

【摘 要】依據中子入射180，182，183，184，186W核反應總截面、去彈截面、彈性散射角分布實驗數據，獲得了3套0-20MeV能區(qū)的光學模型勢參數。在光學模型，扭曲波玻恩近似理論，統一的Hauser-Feshbach理論和激子模型的基礎上，對n+180，182，183，184，186W反應各反應道截面和雙微分截面進行了系統的計算和分析，所得結果與實驗數據符合很好。

【Abstract】With the experimental data of total cross section， inelastic cross section and elastic scattering angular distributions for n+180，182，183，184，186W reactions， three sets of optical potential parameters are obtained at incident neutron energy up to 20 MeV. Based on the theoretical models which include the optical model， the distorted wave Born approximation theory， the unified Hauser-Feshbach theory and the exciton model， the cross section of each reaction channel and double differential cross section are systematically calculated and analyzed for n+180，182，183，184，186W reactions. The results are in good agreement with the experimental data.

【關鍵詞】光學模型；扭曲波玻恩近似理論；彈性散射角分布；雙微分截面

【Key Words】optical model； the distorted wave Born approximation theory； elastic scattering angular distribution； doubledifferential cross section