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EFFECTIVE COLLISION STRENGTHS FOR ELECTRON-IMPACT EXCITATION OF S X

โœ Scribed by K.L. BELL; C.A. RAMSBOTTOM

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
130 KB
Volume
76
Category
Article
ISSN
0092-640X

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โœฆ Synopsis

Effective collision strengths computed by the R-matrix method are presented for the electron-impact excitation of nitrogen-like S X. The total wave function used in the expansion includes the lowest 11 eigenstates of S X which arise from the 2s 2 2 p 3 , 2s2p 4 , 2p 5 and 2s 2 2 p 2 3s configurations. These 11 L S target states correspond to 22 fine-structure levels, giving 231 possible transitions. All the effective collision strengths for these transitions are tabulated in the range log T (K) = 4.6 to log T (K) = 6.7. The energy level values and oscillator strengths for allowed transitions are also tabulated. The effective collision strengths were calculated by averaging the electron collision strengths over a Maxwellian distribution of velocities. The present effective collision strengths are the only results currently available for these fine-structure transition rates.

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