Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203..279j&link_type=abstract
Astrophysical Journal, vol. 203, Jan. 1, 1976, pt. 1, p. 279-283.
Astronomy and Astrophysics
Astrophysics
Argon Plasma, Deuterium Plasma, Forbidden Transitions, Solar Corona, Spectrum Analysis, Theta Pinch, Electron Density (Concentration), Electron Energy, High Temperature Plasmas, Light (Visible Radiation), Population Theory, Ruby Lasers, Spectroscopic Analysis, Thomson Scattering, Transition Probabilities
Scientific paper
An attempt has been made to observe the visible forbidden argon coronal lines at 553.6 nm (Ar X), 691.7 nm (Ar XI), 847.6 nm (Ar XIII), and 441.2 nm (Ar XIV) in a deuterium-argon plasma produced in a large theta pinch. The electron temperature (250 eV) and the electron density (5 by 10 to the 16th power per cu cm) were measured by Thomson scattering of ruby laser radiation. This temperature is adequate to produce ionization stages up to Ar XIV, as was verified by photographic observation of Ar XIV lines. No line corresponding to the coronal lines was observed from the high-temperature plasma, but lines with wavelengths very nearly identical to those of two of the forbidden transitions were observed; these lines were due to allowed transitions of Ar II in a cooler portion of the plasma. Calculation of rate coefficients in the Coulomb-Born approximation shows that for laboratory experiments, electron collisions are much more important than radiative decay in depopulating the upper state of the forbidden lines.
No associations
LandOfFree
Investigation of forbidden transitions in argon ions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Investigation of forbidden transitions in argon ions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investigation of forbidden transitions in argon ions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1571678