Pure rotational and vibration–rotational Raman spectra of tritium,3H2

Abstract

The pure rotational and vibration–rotational Raman spectra of tritium, 3H2, have been recorded and analysed. The following rotational constants, vibration–rotational constants and bond lengths were obtained : B0= 20.03586 ± 0.0005 cm–1; 102D0= 0.499 ± 0.004 cm–1; 106H0= 1.2 ± 0.8 cm–1; α= 0.5856 ± 0.0002 cm–1; 103β=–0.294 ± 0.007 cm–1; Be= 20.3314 ± 0.0006 cm–1; 102De= 0.514 ± 0.004 cm–1; r0= 74.691 ± 0.002 pm; r1= 75.806 ± 0.003 pm; re= 74.151 ± 0.002 pm. The re values for 3H2 are compared with those of 1H2, 1H2H and 2H2.