Short wavelength laser calculations for electron pumping in Be I and B I isoelectronic sequences (18< or =Z< or =36)

Journal Article · Tue Oct 15 04:00:00 EDT 1985 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.335838· OSTI ID:5207601

Feldman, U; Doschek, G A; Seely, J F; Bhatia, A K

Level populations of the 2s3p and 2s/sup 2/3p configurations in ions of the Be I and B I isoelectronic sequences can be inverted, with respect to populations of the 2s3s and 2s/sup 2/3s configurations, by electron collisional pumping. In the case of B I ions, the process is analogous to the process for Ne-like ions, which has lately received considerable attention. In the case of Be I ions, the inversion is a consequence of the slow radiative decay of the 2s3p /sup 3/P/sub 2/ and 2s3p /sup 3/P/sub 0/ levels. Level populations are calculated for Be- and B-like ions with atomic number Z between 18 and 36. For each sequence, 20 levels are involved with principal quantum number n equal either to two or three. Using the level populations, gain coefficients are calculated for transitions of the type 2s3s-2s3p and 2s/sup 2/3s-2s/sup 2/3p. Finally, the opacity of the 2s2p-2s3s and 2s/sup 2/2p-2s/sup 2/3s transitions are discussed, for plasma parameters for which a reasonable gain can be achieved.

• Research Organization: E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, DC 20375--5000
• OSTI ID: 5207601
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 58:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
BERYLLIUM IONS
BORON IONS
CHARGED PARTICLES
DATA
ELECTRICAL PUMPING
ELECTROMAGNETIC RADIATION
ELECTRON BEAM PUMPING
ENERGY-LEVEL DENSITY
GAIN
INFORMATION
IONIZING RADIATIONS
IONS
LASER RADIATION
LASERS
NUMERICAL DATA
OPACITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLASMA
POPULATION INVERSION
PUMPING
RADIATIONS
THEORETICAL DATA
X RADIATION
X-RAY LASERS