Ammonia line lists from 1650 to 4000 cm−1

Abstract

We present further line lists of ammonia (NH3) at high temperatures obtained by recording Fourier transform infrared emission spectra. Calibrated line lists are presented for 12 temperatures (300–1400°C in 100°C intervals) and each line list covers the 1650–4000cm−1 range, which includes the ν1 and ν3 fundamental modes (3μm) plus a number of combination, overtone and hot bands. Using our NH3 spectra, we have estimated empirical lower state energies (ELow in cm−1) and our values have been incorporated into the line lists along with line positions (ν˜ in cm−1) and calibrated line intensities (S′ in cm/molecule). We expect our hot NH3 line lists to find direct application in the modeling of planetary atmospheres and brown dwarfs.