M. Gochitashvili , R. Lomsadze , R.Ya. Kezerashvili , I. Noselidze , M. Schulz
{"title":"Radiative emissions from charge exchange processes in collisions of 0.7–10.0 keV He+ with N2 and O2 molecules","authors":"M. Gochitashvili , R. Lomsadze , R.Ya. Kezerashvili , I. Noselidze , M. Schulz","doi":"10.1016/j.jms.2024.111916","DOIUrl":null,"url":null,"abstract":"<div><p>We present an experimental study of the dissociative excitation in the collision of helium ions with nitrogen and oxygen molecules for collision energy of <span><math><mrow><mn>0</mn><mo>.</mo><mn>7</mn><mtext>–</mtext><mn>10</mn><mo>.</mo><mn>0</mn></mrow></math></span> keV. Absolute emission cross sections are measured and reported for the most pronounced nitrogen and oxygen atomic and ionic lines in vacuum ultraviolet (<span><math><mrow><mn>80</mn><mtext>–</mtext><mn>130</mn><mspace></mspace><mi>nm</mi></mrow></math></span>) and visible (<span><math><mrow><mn>380</mn><mtext>–</mtext><mn>670</mn><mspace></mspace><mi>nm</mi></mrow></math></span>) spectral regions. Remarkable similarities of the processes realized in He<span><math><mrow><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup><mo>+</mo></mrow></math></span>N<sub>2</sub> and He<span><math><mrow><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup><mo>+</mo></mrow></math></span>O<sub>2</sub> collision systems are observed. We present polarization measurements for He<span><math><mrow><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup><mo>+</mo></mrow></math></span>N<sub>2</sub> collision system.</p><p>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<sup>−19</sup> cm<sup>2</sup> or lower.</p></div>","PeriodicalId":16367,"journal":{"name":"Journal of Molecular Spectroscopy","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Spectroscopy","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022285224000432","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
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 keV. Absolute emission cross sections are measured and reported for the most pronounced nitrogen and oxygen atomic and ionic lines in vacuum ultraviolet () and visible () spectral regions. Remarkable similarities of the processes realized in HeN2 and HeO2 collision systems are observed. We present polarization measurements for HeN2 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.
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.