Measurements of excitation rate coefficients for Al-like ions: Fe XIV, Ni XVI, and Cu XVII

Journal Article · Tue Dec 01 04:00:00 EST 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.36.5448· OSTI ID:5611803

Datla, R U; Roberts, J R; Durst, R D; Hodge, W L; Klepper, C C; Rowan, W L; Mann, J B

Absolute excitation rate coefficients for Fe XVI and Ni xvi ions ions are measured spectroscopically in the Texas Experimental Tokamak. Previous measurements for the 3d-3p transition array of Cu XVII are verified and the measurements are extended to the 3s3p/sup 2/..-->..3s/sup 2/3p transition array of this ion. The experimental rate coefficient for the 3d-3p transition array of Fe XIV is 6.2 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 160 eV and for Ni XVI and Cu XVII, the values are 4.2 x 10/sup -9/ and 3.8 x 10/sup -9/ cm/sup 3/ s/sup -1/, respectively, at an electron temperature near 240 eV. For the 3s3p/sup 2/ /sup 2/P/sub 3/2/..-->..3s/sup 2/3p /sup 2/P/sub 3/2/ transition array, the experimental excitation rate coefficient for Fe XIV is 8.2 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 160eV and for Ni XVI and Cu XVII the value is 5.5 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 240 eV. The uncertainty in these results is estimated to be +- 50% (one standard deviation). Computed values of absolute excitation rates in a distorted-wave approximation and Mewe's semiempirical formula are found to be in good agreement with the experimental values.

• Research Organization: Atomic and Plasma Radiation Division, Center for Radiation Research, National Bureau of Standards, Gaithersburg, Maryland 20899
• OSTI ID: 5611803
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 36:11; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
CHARGED PARTICLES
CLOSED PLASMA DEVICES
COLLISIONS
COPPER IONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON TEMPERATURE
ELECTRON-ION COLLISIONS
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
ION COLLISIONS
IONS
IRON IONS
MULTICHARGED IONS
NICKEL IONS
PLASMA
PLASMA DIAGNOSTICS
SPECTRA
TEXT DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES