CH₄ Ice at 33 K

Crystalline methane (CH₄) ice deposited at 10 K onto a thallium bromoiodide (KRS-5) substrate, then annealed at 33 K, and held at 33 K during spectroscopic measurements.

The imaginary part (k) of the complex index of refraction was determined using optical measurements done at a temperature of 33 K, by transmission spectroscopy from 1.133 to 2.608 µm with resolutions of ~6 cm⁻¹ from 0.35 to 2.5 µm and ~1 cm⁻¹ from 2.0 to 2.6 µm.

The accuracy of k is estimated at ± 5%.

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

k

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

Khare, B. N., Thompson, W. R., Sagan, C., Arakawa, E. T., Bruel, C., Judish, J. P., Khanna, R. K. and Pollack, J. B. (1990) 'Optical Constants of Solid Methane', pp. 327-339 in NASA Conference Publication 3077, First International Conference on Laboratory Research for Planetary Atmospheres, Proceedings of a conference held at Bowie State University, Bowie, Maryland, October 25-27, 1989.