Biomaterial Database

Two-body Coulomb explosion in methylacetylene in intense laser fields: double proton migration and proton/deuteron exchange. 2012

Tomoya Okino, and Anri Watanabe, and Huailiang Xu, and Kaoru Yamanouchi

Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.

Two-body decomposition processes of methylacetylene (CH(3)CCH) and its isotopomer methyl-d(3)-acetylene (CD(3)CCH) in intense laser fields (790 nm, 40 fs, 5.0 × 10(13) W cm(-2)) are investigated by the coincidence momentum imaging (CMI). In methyl-d(3)-acetylene, a total of six decomposition pathways in which one of the C-C bonds is broken and a total of six pathways in which an atomic hydrogen ion (H(+) or D(+)) or a molecular hydrogen ion (H(2)(+), HD(+), D(3)(+), or HD(2)(+)) is ejected are identified. It is revealed from the analysis of the CMI data that the migration of two deuterons as well as the exchange between a proton and a deuteron occurs prior to the two-body decomposition of a doubly charged parent molecule.

UI	MeSH Term	Description	Entries
D007834	Lasers	An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.	Masers,Continuous Wave Lasers,Pulsed Lasers,Q-Switched Lasers,Continuous Wave Laser,Laser,Laser, Continuous Wave,Laser, Pulsed,Laser, Q-Switched,Lasers, Continuous Wave,Lasers, Pulsed,Lasers, Q-Switched,Maser,Pulsed Laser,Q Switched Lasers,Q-Switched Laser
D011522	Protons	Stable elementary particles having the smallest known positive charge, found in the nuclei of all elements. The proton mass is less than that of a neutron. A proton is the nucleus of the light hydrogen atom, i.e., the hydrogen ion.	Hydrogen Ions,Hydrogen Ion,Ion, Hydrogen,Ions, Hydrogen,Proton
D003903	Deuterium	The stable isotope of hydrogen. It has one neutron and one proton in the nucleus.	Deuterons,Hydrogen-2,Hydrogen 2
D000480	Alkynes	Hydrocarbons with at least one triple bond in the linear portion, of the general formula Cn-H2n-2.	Acetylenic Compounds,Alkyne,Acetylenes
D041961	Deuterium Exchange Measurement	A research technique to measure solvent exposed regions of molecules that is used to provide insight about PROTEIN CONFORMATION.	Hydrogen-Deuterium Exchange Measurement,Deuterium Exchange Measurements,Exchange Measurement, Deuterium,Exchange Measurement, Hydrogen-Deuterium,Exchange Measurements, Deuterium,Exchange Measurements, Hydrogen-Deuterium,Hydrogen Deuterium Exchange Measurement,Hydrogen-Deuterium Exchange Measurements,Measurement, Deuterium Exchange,Measurement, Hydrogen-Deuterium Exchange,Measurements, Deuterium Exchange,Measurements, Hydrogen-Deuterium Exchange