NH₃ Ice at 40 K

Amorphous ammonia (NH₃) ice deposited at 40 K onto a cesium iodide (CsI) substrate, and held at 40 K during spectroscopic measurements.

The real (n) and imaginary (k) parts of the complex index of refraction were determined using optical measurements done at a temperature of 40 K, by normal-incidence transmission spectroscopy from 7000 to 440 cm⁻¹ with a resolution of 1 cm⁻¹ in the wavenumber range 7000-4000 cm⁻¹ and 0.5 cm⁻¹ in the wavenumber range 4000-440 cm⁻¹.

The accuracy of the n indices is estimated at ± 2.6%. The accuracy of the k indices is estimated at ± 7% in the mid-infrared region and ± 3% in the near-infrared region.

Data is licensed and made available under the terms of the Creative Commons Attribution 4.0 licence (https://creativecommons.org/licenses/by/4.0/).

More information can be found in the publication and on the OCdb contributor's page.

n,k,All

Any use of this data should recognize the parent publication(s):

Roser, J. E., Ricca, A., Cartwright, R. J., Dalle Ore, C. and Cruikshank, D. P. (2021) 'The Infrared Complex Refractive Index of Amorphous Ammonia Ice at 40 K (1.43-22.73 µm) and Its Relevance to Outer Solar System Bodies', The Planetary Science Journal, 2:240, 11 pp.

https://doi.org/10.3847/PSJ/ac3336