Rotational energy levels, statistical weights, transition frequencies and Einstein A coefficients up to 632 cm-1 above ground are from CDMS, version 1 of February 2018.

Collisional rates with H2 are scaled He rates from Cabrera-González et al (2018), calculated for temperatures in the range from 10 to 300 K for energy levels up to J=27.

Last update: 2022 September 13. Send comments to moldata@strw.leidenuniv.nl