Effective cross sections for electron-impact excitation of spectral transitions from the metastable 4{sup 3}P{sub 0.2} states in calcium atoms

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Optics and Spectroscopy

OSTI ID:209997

Shafran`osh, I I; Snegurskaya, T A; Margitich, N A ^[1]

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1. Uzhgorod State Univ. (Ukraine)

Using the optical method and crossed electron and atomic beam technique, the effective excitation cross sections and their energy dependences (up to 30 eV) are determined for the metastable 4{sup 3}P{sub 0.2} states of calcium atoms. The largest excitation cross sections were observed for the first members of the sharp (4{sup 3}P{sub 2}-5{sup 3}S{sub 1}) and diffuse (4{sup 3}P{sub 2}-4{sup 3}D{sub j}) series, whose respective magnitudes at 30 eV are 9 x 10{sup -16} cm{sup 2} and 2 x 10{sup -16} cm{sup 2}. The {sup 3}P{sub j} and {sup 3}D{sub j} shifted terms of the two-electron excitation p{sup 2}, dp, and d{sup 2} configurations were found to be excited rather efficiently from the metastable states. The behavior of the energy dependences of the excitation cross sections for the spectral transitions from the metastable states is explained. 8 refs., 5 figs., 1 tab.

• OSTI ID: 209997
• Journal Information: Optics and Spectroscopy, Journal Name: Optics and Spectroscopy Journal Issue: 5 Vol. 77; ISSN OPSUA3; ISSN 0030-400X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CALCIUM
CROSS SECTIONS
ELECTRON-ATOM COLLISIONS
ENERGY-LEVEL TRANSITIONS
EXCITATION
METASTABLE STATES