TY - JOUR
T1 - Three-body fragmentation dynamics of CH3CCH3+ investigated by 50-keV/u Ne8+ impact
T2 - Comparison with its isomer ion CH2CCH2 3+
AU - Yuan, Hang
AU - Xu, Zhongfeng
AU - Xu, Shenyue
AU - Ma, Chao
AU - Zhang, Zhen
AU - Guo, Dalong
AU - Zhu, Xiaolong
AU - Zhao, Dongmei
AU - Zhang, Shaofeng
AU - Yan, Shuncheng
AU - Gao, Yong
AU - Zhang, Ruitian
AU - Ma, Xinwen
N1 - Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/2
Y1 - 2022/2
N2 - The three-body fragmentation dynamics of propyne (CH3CCH) to H+ + CH+ + C2H2+ and H+ + CH2+ + C2H+ is investigated by 50-keV/u Ne8+ ion impact. Employing the reaction microscope, all three ionic fragments are detected in coincidence, and the momentum vector as well as kinetic energy of each fragment is obtained. By analyzing the momentum and kinetic energy correlation between different fragments, various fragmentation mechanisms are identified, and the relative ratio of each mechanism is determined. We find that the concerted fragmentation with CH and CC bonds breaking simultaneously and the sequential pathway with CH breakage prior to the CC breakage are the major contributions to both channels. In contrast, the sequential pathway with CC breakage prior to CH breakage was found to make a minor contribution only to the H+ + CH+ + C2H2+ channel. In addition, we compare the present results for CH3CCH with CH2CCH2 published in Ma et al. [C. Ma, S. Xu, D. Zhao, D. Guo, S. Yan, W. Feng, X. Zhu, and X. Ma, Phys. Rev. A 101, 052701 (2020)2469-992610.1103/PhysRevA.101.052701]. The location of the CH and CC bonds' breakage, either from distinct C atoms or from the same C atom, leads to similar dissociation mechanisms but different ionic fragments for the two isomers.
AB - The three-body fragmentation dynamics of propyne (CH3CCH) to H+ + CH+ + C2H2+ and H+ + CH2+ + C2H+ is investigated by 50-keV/u Ne8+ ion impact. Employing the reaction microscope, all three ionic fragments are detected in coincidence, and the momentum vector as well as kinetic energy of each fragment is obtained. By analyzing the momentum and kinetic energy correlation between different fragments, various fragmentation mechanisms are identified, and the relative ratio of each mechanism is determined. We find that the concerted fragmentation with CH and CC bonds breaking simultaneously and the sequential pathway with CH breakage prior to the CC breakage are the major contributions to both channels. In contrast, the sequential pathway with CC breakage prior to CH breakage was found to make a minor contribution only to the H+ + CH+ + C2H2+ channel. In addition, we compare the present results for CH3CCH with CH2CCH2 published in Ma et al. [C. Ma, S. Xu, D. Zhao, D. Guo, S. Yan, W. Feng, X. Zhu, and X. Ma, Phys. Rev. A 101, 052701 (2020)2469-992610.1103/PhysRevA.101.052701]. The location of the CH and CC bonds' breakage, either from distinct C atoms or from the same C atom, leads to similar dissociation mechanisms but different ionic fragments for the two isomers.
UR - https://www.scopus.com/pages/publications/85125875089
U2 - 10.1103/PhysRevA.105.022814
DO - 10.1103/PhysRevA.105.022814
M3 - 文章
AN - SCOPUS:85125875089
SN - 2469-9926
VL - 105
JO - Physical Review A
JF - Physical Review A
IS - 2
M1 - 022814
ER -