Radiative emissions from charge exchange processes in collisions of 0.7–10.0 keV He+ with N2 and O2 molecules

IF 1.4 4区 物理与天体物理 Q4 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL
M. Gochitashvili , R. Lomsadze , R.Ya. Kezerashvili , I. Noselidze , M. Schulz
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引用次数: 0

Abstract

We present an experimental study of the dissociative excitation in the collision of helium ions with nitrogen and oxygen molecules for collision energy of 0.710.0 keV. Absolute emission cross sections are measured and reported for the most pronounced nitrogen and oxygen atomic and ionic lines in vacuum ultraviolet (80130nm) and visible (380670nm) spectral regions. Remarkable similarities of the processes realized in He++N2 and He++O2 collision systems are observed. We present polarization measurements for He++N2 collision system.

The emission of excited dissociative products was detected using an improved high-resolution optical spectroscopy method. This method incorporates the retarding potential method and a high resolution electrostatic energy analyzer to precisely measure the energy of incident particles and the energy of dispersion. The improvement in the optical sensitivity allows us to measure the cross section on the order of 10−19 cm2 or lower.

Abstract Image

0.7-10.0 keV He+与 N2 和 O2 分子碰撞中电荷交换过程的辐射发射
我们对氦离子与氮分子和氧分子碰撞时的离解激发进行了实验研究,碰撞能量为 0.7-10.0 千伏。测量并报告了真空紫外线(80-130 纳米)和可见光(380-670 纳米)光谱区最明显的氮和氧原子和离子线的绝对发射截面。我们观察到在 He++N2 和 He++O2 碰撞系统中实现的过程具有显著的相似性。我们介绍了 He++N2 对撞系统的偏振测量结果。该方法结合了滞后电位法和高分辨率静电能量分析仪,可精确测量入射粒子的能量和色散能量。光学灵敏度的提高使我们能够测量 10-19 平方厘米或更小数量级的横截面。
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来源期刊
CiteScore
2.70
自引率
21.40%
发文量
94
审稿时长
29 days
期刊介绍: The Journal of Molecular Spectroscopy presents experimental and theoretical articles on all subjects relevant to molecular spectroscopy and its modern applications. An international medium for the publication of some of the most significant research in the field, the Journal of Molecular Spectroscopy is an invaluable resource for astrophysicists, chemists, physicists, engineers, and others involved in molecular spectroscopy research and practice.
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