COLLISIONAL ACTIVATION OF LARGE IONS - ENERGY-LOSSES AND AN IMPULSIVE COLLISION-THEORY OF ENERGY-TRANSFER
UNSPECIFIED. (1994) COLLISIONAL ACTIVATION OF LARGE IONS - ENERGY-LOSSES AND AN IMPULSIVE COLLISION-THEORY OF ENERGY-TRANSFER. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 90 (2). pp. 239-247. ISSN 0956-5000Full text not available from this repository.
The translational energy losses, Delta E, experienced by keV beams of singly charged ions of high masses (> 1000 u) in collisions with either an inert-gas atom or hydrogen molecule depend on the mass of the target gas employed. There is no evidence of a dependence on the ionisation energy of the target gas. Delta Es are similar with He and D-2 targets, and both are larger than those with Ar. This behaviour is found with organic ions composed of light atoms and with inorganic cluster ions composed of heavy atoms. The measured Delta Es are consistent with internal energy uptake, Q, occurring via direct momentum transfer in an impulsive collision. It is concluded that the Q taken up by an ion is dependent upon the masses of its constituent atoms. In collision with He, a light-atom ion of a given molecular mass takes up more Q than does a heavy-atom ion of similar molecular mass under the same experimental conditions, but the Delta E can be similar in the two cases.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
Q Science > QC Physics
|Journal or Publication Title:||JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS|
|Publisher:||ROYAL SOC CHEMISTRY|
|Official Date:||21 January 1994|
|Number of Pages:||9|
|Page Range:||pp. 239-247|
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