G. Buffa et al., COLLISIONAL SHIFT OF (NH3)-N-15 AMMONIA INVERSION SPECTRUM, Journal of quantitative spectroscopy & radiative transfer, 52(5), 1994, pp. 673-675
The pressure-induced shifts of five 15NH3 inversion transitions in the
18-26 GHz frequency range are measured with a travelling-wave spectro
meter. The shifts are compared with those of 14NH3 and with theoretica
l calculations.