Isotope shift studies in UV lines of Sm I on FTS: level isotope shifts and configuration assignments of the energy levels of neutral samarium atom
Spectroscopy Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
2 Synchrotron Radiation Section, BARC, Trombay, Mumbai-85, India
Revised: 16 December 2004
Published online: 7 September 2004
Isotope shifts in 200 spectral lines of neutral samarium atom (Sm I) in the region of nm ( cm have been measured using a Fourier Transform Spectrometer. Isotope shift data in 187 spectral lines of Sm I are being reported for the first time. Level isotope shifts, of 119 high odd- and 7 low even-parity energy levels have been evaluated using present isotope shift data combined with the earlier available data. These values have enabled us to check the assignments to and configurations of the odd-parity levels made earlier on the basis of parametric calculations. For several levels, the reported compositions of the mixed configuration of type [ H0, 6F F) P] have been interpreted with the help of our values. 20 unassigned energy levels have been uniquely assigned to configuration. The present study provides values of the levels, which were tentatively assigned to and configurations. We could also identify configuration for 12 unassigned levels.
PACS: 31.30.Gs – Hyperfine interactions and isotope effects, Jahn-Teller effect
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004