We present triple-differential cross section results for the positron and electron induced single ionization of the Ar (3p) and Ar (3s) atoms at incident energy 1 keV. The triple-differential cross sections (TDCSs) have been calculated in the modified distorted wave formalism using the second Born approximation. The TDCSs have been calculated in coplanar asymmetric geometry for different kinematical conditions. The second Born term has been found to be significant in obtaining the TDCS for electron as well as positron impact at smaller values of momentum transfer and it produces better agreement with the recent available measurements for Ar (3p). With the increase of momentum transfer, the dominance of binary emission of electrons has been found to increase for the positron impact ionization of Ar (3s).

我们提出了正电子和电子诱导的Ar（3p）和Ar（3s）原子在入射能量1 keV处的单电离三倍截面结果。使用第二次Born近似，在修正的畸变波形式学中计算了三重差横截面（TDCS）。TDCS已针对不同的运动学条件以共面不对称几何计算。已发现第二个Born项对于在较小的动量传递值下获得电子TDCS和正电子冲击具有重要意义，并且它与Ar（3p）的最新可用测量结果更好地吻合。随着动量传递的增加，已发现电子的二元发射占主导地位的Ar（3s）的正电子碰撞电离增加。