在2.52MeV质子P波窄共振能量附近^(56)FeK层电离几率的测量

THE MODIFICATION OF K-SHELL IONIZATION PROBABILITY THROUGH 2.52 MeV RESONANCE ON ^(56)Fe

本文报道为验证新的原子碰撞机制所进行的^(56)Fe共振弹性散射实验。在质子能量为2.52MeV共振处,观察到了^(56)Fe原子K_x射线发射几率随入射能量不再保持平滑连续的变化关系,而是呈现出有大于50％的相对变化。这一实验结果表明,当原子电子结合能U_K及共振宽度Г的比值U_K/Г大到5.27的条件下,入射粒子在形成复合核前的碰撞电离反复合核共振散射出射粒子碰撞电离之间仍存在着干涉效应。利用Blair-Anholt理论计算和实验结果的比较,引出了重要的原子碰撞单极报幅的虚部值参数Imb_0,并确认R_0=Imb_0/Reb_0的值为+1.8。

This paper presents the experimental result of K-shell ionization probability over 2.52 MeV p-wave narrow resonance in the reaction of ^(56)Fe(P, P0)56Fe. The 50% modification of Kx-ray emission probability on resonance relative to off resonance has been clearly observed. It indicates that with the ratio U_K/Γ as large as 5.3, the interference between the incoming and outgoing target K-shell ionization amplitudes in an atomic collision still exists. From the comparison of calculation based on theoretical formula of Blair and Anholt with the experimental result. The imaginary part of the atomic monopole amplitude Imb_0 was deduced and the R_0=Imb_0/Reb_0 was obtained as +1.8.