Oscillator strengths of selected resonance transitions in neutral sulfur

Journal Article · Sat May 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:281515

Beideck, D J; Schectman, R M; Federman, S R; Ellis, D G

As part of our continuing program of measuring f-values which are of astrophysical interest, meanlives and branching ratios for the 4s {sup 3}S{sup o} level was determined using beam foil techniques with the Toledo Heavy Ion Accelerator, THIA. The value 1.875{plus_minus}0.094 ns was obtained for the meanlife from multiexponential fitting to decay curves, a procedure which is reliable when all significant cascades are from levels with much longer meanlives. Oscillator strengths for the transitions 3p{sup 4} {sup 3}P{sub 0,1,2} - 4s {sup 3}S{sup o}{sub 1} were determined from this value together with the measured branching ratios. The preliminary result for the multiplet oscillator strength, 0.088{plus_minus}0.015, is slightly below other experimental measurements but is of improved accuracy. The mean of previous experimental measurements and theoretical calculations for this multiplet are in good agreement with our result. The 3p{sup 4} {sup 3}P{sub 2}- 4s {sup 3}S{sup o}{sub 1} transition of this multiplet at 1807.34{Angstrom}, is of particular interest to the study of interstellar matter since it involves a ground state transition. An investigation of the 3p{sup 4} {sup 3}P{sub 0,1,2} - 4s{double_prime} {sup 3}P{sup o}{sub 2,1,0} transitions in neutral sulfur is in progress and its results will also be reported.

• OSTI ID: 281515
• Report Number(s): CONF-9305421--; CNN: Grant NAGW-2457
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BRANCHING RATIO
ENERGY-LEVEL TRANSITIONS
INTERSTELLAR GRAINS
OSCILLATOR STRENGTHS
SULFUR