Refine your search�ソスF     
Report No.
 - 

Chemical bond formation in adsorbed and condensed methane by He+ ion irradiation

Narita, Ayumi; Baba, Yuji  ; Sekiguchi, Tetsuhiro  ; Shimoyama, Iwao   ; Honda, Mitsunori   ; Hirao, Norie; Yaita, Tsuyoshi

Photon or electron irradiation breaks chemical bond and induces desorption of fragment. However, formation of chemical bond from adsorbed light molecules, such as methane, by high energy radiation has scarcely been reported. This process is important in space, because organic molecules can be formed through these reactions. In this report, we have investigated formation of molecular ions and neutral molecules with covalent bond from frozen methane by He+ ion irradiation. It was found that acetylene ion(C2H2+), and ethylene ion(C2H4+) with covalent bond were formed by He+ ion irradiation. These results were compared with Monte-Carlo simulation for energy-loss processes of He+ ions in solid methane. As a result, it was elucidated that molecular ions are formed inside of frozen methane by high-density excitation due to nuclear collision. On the other hand, neutral molecules are formed by rapid evaporation due to temperature increase along the nuclear track.

Accesses

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.