Effects of autoionizing resonances on electron-impact excitation rates for transitions among n =3 levels in neonlike selenium

Journal Article · Tue May 01 00:00:00 EDT 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.41.4759· OSTI ID:6941427

Chen, M H; Reed, K J ^[1]

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1. High Temperature Physics Division, Lawrence Livermore National Laboratory, Livermore, California 94550 (USA)

Direct and resonance excitation rate coefficients have been calculated for transitions between states with principal quantum number {ital n}=3 in Ne-like selenium. A relativistic distorted-wave method was used to compute the direct excitation rate coefficients and the resonance excitation rate coefficients were obtained using a multiconfiguration Dirac-Fock method. The effect of autoionizing resonances has been found to be significant for most transitions, especially at low temperatures. The resonances enhance the rate coefficients for some electric-dipole-allowed transitions by as much as a factor of 2. For strongly forbidden transitions, resonances can increase the rate coefficients by more than an order of magnitude.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6941427
• Journal Information: Physical Review, A (General Physics); (USA), Vol. 41:9; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
SELENIUM IONS
AUTOIONIZATION
ELECTRON-ION COLLISIONS
DISTORTED WAVE THEORY
E1-TRANSITIONS
EXCITATION
FORBIDDEN TRANSITIONS
RESONANCE
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ENERGY-LEVEL TRANSITIONS
ION COLLISIONS
IONIZATION
IONS
MULTIPOLE TRANSITIONS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena