Excitation functions for the reactions of Ar$sup +$ with CH$sub 4$, CD$sub 4$, and CH$sub 2$$D$$sub 2$

Journal Article · Mon Dec 01 04:00:00 EST 1975 · J. Chem. Phys., v. 63, no. 11, pp. 4582-4591

OSTI ID:4070501

Wyatt, J R; Strattan, L W; Chivalak, S; Hierl, P M

Integral reaction cross sections as a function of initial translational energy (0.4--30 eV c.m.) are reported for isotopic variants of the exoergic ion- molecule reaction Ar$sup +$+CH$sub 4$ $Yields$ ArH$sup +$+CH$sub 3$. The excitation functions, which maximize at about 5 eV and decrease at lower collision energies, appear to possess translational energy thresholds at about 0.1 eV. At the higher energies there is a large isotope effect favoring abstraction of H over D. The observed threshold behavior, unusual for exoergic reactions of positive ions, is discussed in terms of the formation of an ArCH$sub 4$$sup +$ intermediate complex at low collision energies. (AIP)

• Research Organization: Department of Chemistry, University of Kansas, Lawrence, Kansas 66045
• NSA Number: NSA-33-015660
• OSTI ID: 4070501
• Journal Information: J. Chem. Phys., v. 63, no. 11, pp. 4582-4591, Journal Name: J. Chem. Phys., v. 63, no. 11, pp. 4582-4591; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

*ARGON IONS-- ION-MOLECULE COLLISIONS
*DEUTERIUM-- ISOTOPE EFFECTS
*METHANE-- ION-MOLECULE COLLISIONS
640304* --Physics Research--Atomic
Molecular & Chemical Physics--Collision Phenomena
CHEMICAL REACTIONS
CROSS SECTIONS
EV RANGE 01-10
EV RANGE 10-100
EXCITATION
MILLI EV RANGE
N40220 --Chemistry--Inorganic
Organic
& Physical Chemistry--Isotopic Effects
N60400* --Physics (Atomic & Molecular)--Collision Phenomena