Measurement of cross sections for electronic-rotational excitation of d/sup 3/Pi/sup -//sub u/, v states of orthohydrogen by electron impact

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Opt. Spectrosc. (Engl. Transl.); (United States)

OSTI ID:6315114

Bogdanova, I P; Efremova, G V; Lavrov, B P; Ostrovskii, V N; Ustimov, V I; Yakovleva, V I

The luminescence of spectral lines of the Q branches of the first four diagonal bands in Fulcher's ..cap alpha.. system (d/sup 3/Pi/sup -//sub u/..-->.. a/sup 3/..sigma../sup +//sub g/), excited by an electron beam of adjustable energy epsilon-c = 0--100 eV, has been studied. Liquid nitrogen cooling of the electron gun made it possible to find the cross sections for electronic-rotational excitation of the d/sup 3/Pi/sup -//sub u/, v levels from the X/sup 1/..sigma../sup +//sub g/, v/sub 0/ = 0 ground state of orthohydrogen. It was noted that the relative cross sections of rotational transitions depend on the vibrational quantum number in the final state for excitation. This must be considered when determining the gas temperature from the distribution of intensity in the rotational structure of the molecular bands emitted by a low pressure plasma.

• OSTI ID: 6315114
• Journal Information: Opt. Spectrosc. (Engl. Transl.); (United States), Journal Name: Opt. Spectrosc. (Engl. Transl.); (United States) Vol. 50:1; ISSN OPSUA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
CROSS SECTIONS
DATA
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
LUMINESCENCE
MOLECULE COLLISIONS
NONMETALS
NUMERICAL DATA
ROTATIONAL STATES