https://doi.org/10.1140/epjd/e2004-00114-3
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
1
Spectroscopy Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
2
Synchrotron Radiation Section, BARC, Trombay, Mumbai-85, India
Corresponding authors: a bkankush@magnum.barc.ernet.in - b mndeo@vsnl.com - c avenu@apsara.barc.ernet.in - d saahmad@vsnl.com
Received:
31
July
2003
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
