CO2q+（q=2，3）与1MeV质子碰撞的碎裂动力学

IF 1.7 Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

Atoms Pub Date : 2023-04-23 DOI:10.3390/atoms11050075

Avijit Duley, A. Kelkar

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引用次数: 0

摘要

利用配备多点时间和位置灵敏探测器的反冲离子动量谱仪，研究了在1MeV质子撞击下形成的CO2q+（q=2，3）分子离子的碎裂动力学。对CO2分子离子双电离和三电离产生的两体和三体碎裂通道进行了鉴定和分析。已经获得了各种通道的动能释放（KER）分布。在Dalitz图和牛顿图的帮助下，已将协调和顺序过程分配给观测到的碎裂通道。此外，角关联用于确定前体分子离子的分子几何结构。研究发现，对称分解为C++O++O+涉及在通过协同衰变离解之前CO23+中分子键的不对称拉伸，这意味着与1MeV质子的碰撞导致CO2的异步衰变。

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Fragmentation Dynamics of CO2q+ (q = 2, 3) in Collisions with 1 MeV Proton

The fragmentation dynamics of the CO2q+ (q = 2, 3) molecular ions formed under the impact of 1 MeV protons is studied using a recoil ion momentum spectrometer equipped with a multi-hit time- and position-sensitive detector. Both two-body and three-body fragmentation channels arising from the doubly and triply ionized molecular ions of CO2 are identified and analyzed. Kinetic energy release (KER) distributions have been obtained for various channels. With the help of Dalitz plots and Newton diagrams concerted and sequential processes have been assigned to observed fragmentation channels. In addition, angular correlations are used to determine the molecular geometry of the precursor molecular ion. It is found that the symmetric breakup into C+ + O+ + O+ involves asymmetric stretching of the molecular bonds in CO23+ prior to dissociation via concerted decay implying the fact that collisions with 1 MeV proton induces an asynchronous decay in CO2.

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来源期刊

Atoms Physics and Astronomy-Nuclear and High Energy Physics

CiteScore

2.70

自引率

22.20%

发文量

128

审稿时长

8 weeks

期刊介绍： Atoms (ISSN 2218-2004) is an international and cross-disciplinary scholarly journal of scientific studies related to all aspects of the atom. It publishes reviews, regular research papers, and communications; there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles. There are, in addition, unique features of this journal: -manuscripts regarding research proposals and research ideas will be particularly welcomed. -computed data, program listings, and files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Scopes: -experimental and theoretical atomic, molecular, and nuclear physics, chemical physics -the study of atoms, molecules, nuclei and their interactions and constituents (protons, neutrons, and electrons) -quantum theory, applications and foundations -microparticles, clusters -exotic systems (muons, quarks, anti-matter) -atomic, molecular, and nuclear spectroscopy and collisions -nuclear energy (fusion and fission), radioactive decay -nuclear magnetic resonance (NMR) and electron spin resonance (ESR), hyperfine interactions -orbitals, valence and bonding behavior -atomic and molecular properties (energy levels, radiative properties, magnetic moments, collisional data) and photon interactions