Elastic scattering of intermediate energy electrons by HCN

Journal Article · Tue Aug 15 00:00:00 EDT 1978 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.436775· OSTI ID:6714419

Srivastava, S K; Tanaka, H; Chutjian, A

Utilizing a crossed electron beam--molecular beam geometry and a relative gas flow technique, ratios sigma (HCN,theta)/sigma (He,theta) of elastic differential cross sections of HCN to those of He have been measured at electron impact energies of 3,5,11.6, 21.6, and 50 eV and at scattering angles of 20/sup 0/ to 130/sup 0/. Normalized absolute values of sigma (HCN,theta) have been obtained by multiplying these ratios by the absolute values of sigma (He,theta) reported previously. Since the rotational--vibrational structure in HCN was not resolved in the present measurements, the term elastic here includes contributions from elastic scattering, as well as from pure rotational and the 1--0, ..nu../sub 2/ vibrational excitations. The elastic differential cross sections have been compared with the predictions of the Born approximation and classical perturbation theory. For angular regions lying between 0/sup 0/ and 20/sup 0/, and 130/sup 0/ and 180/sup 0/, sigma (HCN,theta) values have been obtained by extrapolation. These values have been used to calculate the integral and momentum-transfer cross sections.

• Research Organization: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91103
• OSTI ID: 6714419
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 69:4; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
BEAMS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY RANGE
EV RANGE
EV RANGE 01-10
EV RANGE 10-100
HYDROCYANIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LEPTON BEAMS
MOLECULAR BEAMS
MOLECULE COLLISIONS
PARTICLE BEAMS
SCATTERING