Precision energies and hyperfine structures of the 5 s5 p 3 P {0,1,2/0} and 5 s6 s 3 S 1 levels in In II
Abstract
Absolute frequencies of hyperfine components of the 230.6 nm (5 s 2 1 S 0-5 s5 p 3 P {1/0}), 193.6 nm (5 s5 p 3 P {0/0}-5 s6 s 3 S 1), 197.7 nm (5 s5 p 3 P {1/0}-5 s6 s 3 S 1) and 207.9 nm (5 s5 p 3 P {2/0}-5 s6 s 3 S 1) transitions in In II emitted from a hollow-cathode source have been measured using a high-resolution, scanning échelle monochromator. The measured frequencies of these four transitions have been used to determine the energies and hyperfine interaction constants of the 5 s5 p 3 P {0/0},3 P {1/0},3 P {2/0} and 5 s6 s 3 S 1 levels in In II. The hyperfine interaction constants for the dominant isotope115In are found to be: 5 s5 p 3 P {1/0} A=0.2322(2) cm-1, B=-0.0159(9) cm-1 5 s5 p 3 P {2/0} A=0.1699(4) cm-1, B= 0.021 (6) cm-1 5 s6 s 3 S 1 A=0.4022(4) cm-1, B= 0.002 (2) cm-1. The absolute frequency of the very narrow, strongly forbidden In II 236.5 nm (5 s 2 1 S 0-5 s5 p 3 P {0/0}) transition, which has been proposed as a candidate for a new optical frequency standard, is found to be 42275.986(7) cm-1.
- Publication:
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Zeitschrift fur Physik D Atoms Molecules Clusters
- Pub Date:
- December 1993
- DOI:
- Bibcode:
- 1993ZPhyD..27..313L
- Keywords:
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- 32.30.Jc;
- 35.10.Fk