Optical spectroscopy of homonuclear ion-atom collisions. Ne + + Ne
Optical spectroscopy of homonuclear ion-atom collisions. Ne + + Ne
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同核离子原子碰撞的光谱。
DOI：
10.1103/physreva.13.2087
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发表时间：
1976
影响因子：
2.9
通讯作者：
L. E. Murray
中科院分区：
文献类型：
--
作者：
R. Isler;L. E. Murray
研究了Ne/Sup+/+Ne体系在30 eV~7keV的能量范围内360~7200A的谱线发射，研究了Ne/Sup+/+Ne体系的非弹性碰撞过程。对于Ne I(2p/sup 5/3s，2p/sup 5/3p)和Ne II(2p/sup 4/3s，2p/sup 4/3p)，已经确定了来自几种激发态的谱线的阈值和发射截面。Ne I线的产生主要是单电子激发的结果，最强激发组态是2p/sup 5/3s。该反应的阈值为23.5+-1 eV，与理论计算符合得很好。2p/sup 5/3s组态激发的表观优势与测量散射离子能量损失的结果不同。这种差异可能是由于直接激发和电荷交换到激发态的截面不同所致。Ne II的激发似乎发生在靶原子同时电离的双电子过程中。还观察到了Ne III的低强度谱线。(AIP)
Inelastic collisional processes of the Ne/sup +/ + Ne system have been examined by studying the emission of spectral lines in the range between 360 and 7200 A at impact energies from 30 eV to 7 keV. Thresholds and emission cross sections for lines which originate from several excited configurations have been determined for both Ne I (2p/sup 5/3s, 2p/sup 5/3p) and Ne II (2p/sup 4/3s, 2p/sup 4/3p). The production of Ne I lines is primarily the result of single-electron excitation, and the most strongly excited configuration is 2p/sup 5/3s. The threshold for this reaction, 23.5 +- 1 eV, is in excellent agreement with theoretical calculations. The apparent dominance of excitation of the 2p/sup 5/3s configuration differs from the results observed by measuring the energy loss of scattered ions. It is suggested that this difference may be due to disparities in the cross sections for direct excitation and for charge exchange into excited states. Excitation of Ne II seems to occur in two-electron processes with simultaneous ionization of the target atoms. Low-intensity lines of Ne III are also observed. (AIP)