Determination of radiative lifetimes of neutral sulphur by time-resolved three-photon VUV laser spectroscopy

Radiative lifetimes of the highly exited states 3p(3)8s S-3(1)0 and 3p(3)6d D-3(1,2,3)0 of neutral sulphur have been measured using time-resolved laser-induced fluorescence. The sulphur atoms were generated in a laser-produced plasma. The investigated states were populated through a two-step process involving a two-photon excitation to the lowest excited tripler state of even parity 3p(4) P-3(0,1,2), followed by a one-photon excitation to the investigated state. We obtained tau(8s(3)S(1)(0)) = 40 +/- 5 ns and tau(6d(3)D(1,2,3)(0)) = 75 +/- 7 ns. These values are much longer than theoretically predicted ones and much shorter than those indirectely inferred from astronomical data.

Persson, AndersLund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)fysi-ape (författare)
Svanberg, SuneLund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)fysi-ssv (författare)
Garnir, H. P (författare)
Biemont, E (författare)
AtomfysikFysiska institutionen (creator_code:org_t)

Ingår i:European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics: Springer Science and Business Media LLC2:1, s. 11-141434-60601434-6079

Av författaren/redakt...: Li, Z. S; Persson, Anders; Svanberg, Sune; Garnir, H. P; Biemont, E

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