Fine structure and spectral broadening of Balmer lines in laser-produced plasmas

Journal Article · Sat Dec 01 04:00:00 EST 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.20.2574· OSTI ID:5851268

Nicolosi, P; Tondello, G; Jannitti, E

The profiles of the Balmer lines emitted in a laser-produced plasma by the ions B/sup +4/ to F/sup +8/ have been observed. For the Balmer-..cap alpha.. line the fine-structure components are broadened and partially merged by the Stark effect, the thermal Doppler broadening, and the motional Doppler shift. To these lines a simplified model for a expanding plasma, used previously for the analysis of the Lyman lines of the same ions, has been applied. The results are in very good agreement with the observations, showing the overall validity of the interpretation. The various broadening mechanisms have been unfolded and, in particular, for the range of electron densities considered here, a transition between the weak- and strong-field approximations for the Stark broadening is evident.

• Research Organization: Centro Gas Ionizzati, Consiglio Nazionale delle Ricerche, Universita di Padova, Italy
• OSTI ID: 5851268
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 20:6; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ATOMIC IONS
BALMER LINES
BORON IONS
CHARGED PARTICLES
FINE STRUCTURE
FLUORINE IONS
IONS
LASER-PRODUCED PLASMA
LINE BROADENING
MULTICHARGED IONS
PLASMA
PLASMA DIAGNOSTICS
STARK EFFECT