The 3p43PJ-3p34p3PJ transition in the sulphur atom is investigated in a precision two-photon excitation scheme under Doppler-free and collision-free circumstances yielding an absolute accuracy of 0.0009 cm-1, using a narrowband pulsed laser. This verifies and improves the level separations between amply studied odd parity levels with even parity levels in S I. An improved value for the 3P2-3P1 ground state fine structure splitting is determined at 396.0564 (7) cm-1. A 34S-32S atomic isotope shift was measured from combining time-of-flight mass spectrometry with laser spectroscopy.
|Number of pages||5|
|Journal||Journal of Physics B: Atomic, Molecular and Optical Physics|
|Early online date||8 Jul 2020|
|Publication status||Published - 14 Sep 2020|
- isotope shift
- laser spectroscopy
- sulphur atom