PLEASE NOTE: If you find these spectra helpful in your research, please acknowledge
any use by reference to "Hudson et al." and this NASA web site.
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The Excel file at this address has mid-IR spectra of three two-component ices, H2O + OCS, H2O + H2S, and H2O + SO2, each with a 10:1 number (molar) ratio, with H2O as the more-abundant component. The temperature for each sample was 10 K. See the paper of Yarnall & Hudson (The Astrophysical Journal Letters, 2022) for more details. |
The Excel file at this address has spectra of these eight compounds: ethane, 2-propanol, propene, acetic acid, methyl formate, methanol, ethanol, 1-propanol, formaldehyde, ammonia, HNCO, and HCN. These are the eight compounds of Table 1 in the paper of Hudson & Gerakines, MNRAS, 2019 on irradiated N2 + acetone ices. Each spectrum is of an amorphous ice. See that paper for further details. |
Mid-infrared reference spectra recorded by P. Gerakines in the 1990s during his graduate studies are available at the Internet Archive. These include IR spectra near 10 K for H2O, NH3, CH4, CO, CO2, H2CO, CH3OH, N2, and O2, as well as various mixtures of these compounds. Spectra after far-UV photolysis of many of these ices also are available. |
Mid-IR (4000-400 cm-1) Spectra of Molecules Diluted in
H2O at 15 - 20 K |
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Ice Composition | Description | Available Formats | |
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Carbon Oxides | |||
H2O + CO (20:1) | Water + Carbon Monoxide (20:1) at T = 16 K | ASCII [74 kb]
SPC [20 kb] PDF [25 kb] |
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H2O + CO2 (10:1) | Water + Carbon Dioxide (10:1) at T = 17 K | ASCII [59 kb] SPC [16 kb] PDF [23 kb] |
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Alkanes | |||
H2O + CH4 (20:1) | Water + Methane (20:1) at T = 15 K | ASCII
[56 kb] SPC [16 kb] PDF [22 kb] |
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H2O + C2H6 (20:1) | Water + Ethane (20:1) at T = 15 K | ASCII
[56 kb] SPC [16 kb] PDF [22 kb] |
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H2O + C3H8 (22:1) | Water + Propane (22:1) at T = 16 K | ASCII
[58 kb] SPC [16 kb] PDF [20 kb] |
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H2O + C4H10 (20:1) | Water + Butane (20:1) at T = 16 K | ASCII
[59 kb] SPC [15 kb] PDF [22 kb] |
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Alkenes | |||
H2O + C2H4 (20:1) | Water + Ethylene (20:1) at T = 15 K | ASCII
[57 kb] SPC [15 kb] PDF [22 kb] |
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H2O + C3H6 (17:1) | Water + Propylene (17:1) at T = 17 K | ASCII
[58 kb] SPC [16 kb] PDF [22 kb] |
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Alkynes | |||
H2O + C2H2 (15:1) | Water + Acetylene (15:1) at T = 15 K | ASCII
[58 kb] SPC [16 kb] PDF [20 kb] |
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H2O + C3H4 (approx. 20:1) | Water + Methylacetylene (approx. 20:1) at T = 16 K | ASCII
[59 kb] SPC [16 kb] PDF [21 kb] |
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Dienes | |||
H2O + C3H4 (13:1) | Water + Allene (13:1) at T = 17 K | ASCII
[60 kb] SPC [16 kb] PDF [22 kb] |
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H2O + C4H6 (20:1) | Water + Butadiene (20:1) | ASCII
[56 kb] SPC [16 kb] PDF [22 kb] |
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Alcohols | |||
H2O + CH3OH (5:1) | Water + Methanol (5:1) | ASCII
[224 kb] SPC [59 kb] PDF [33 kb] |
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H2O + C2H5OH (20:1) | Water + Ethanol (20:1) at T = 15 K | ASCII
[56 kb] SPC [16 kb] PDF [23 kb] |
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H2O + C2H4(OH)2 (5:1) | Water + Ethylene Glycol (5:1) at T = 18 K. H2O features are identified with asterisks ("*") in the graphs. | ASCII
[55 kb] EPS [53 kb] |
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Aldehydes | |||
H2O + H2CO (8:1) | Water + Formaldehyde (8:1) at T = 15 K | ASCII
[55 kb] SPC [16 kb] PDF [24 kb] |
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H2O + CH3COH (20:1) | Water + Acetaldehyde (20:1) at T = 16 K | ASCII
[57 kb] SPC [16 kb] PDF [24 kb] |
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Ketones | |||
H2O + (CH3)2CO (20:1) | Water + Acetone (20:1) at T = 16 K | ASCII
[58 kb] SPC [16 kb] PDF [23 kb] |
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H2O + (CH3)(C2H5)CO (approx. 40:1) | Water + Methylethyl Ketone (MEK) (approx. 40:1) | ASCII
[57 kb] SPC [16 kb] PDF [23 kb] |
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Acids | |||
H2O + HCOOH (9:1) | Water + Formic Acid (9:1) at T = 17 K | ASCII
[58 kb] SPC [16 kb] PDF [24 kb] |
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H2O + CH3COOH (10:1) | Water + Acetic Acid (10:1) at T = 16 K | ASCII
[58 kb] SPC [16 kb] PDF [22 kb] |
|
Esters | |||
H2O + HCOOCH3 (20:1) | Water + Methylformate (20:1) at T = 16 K | ASCII
[73 kb] SPC [20 kb] PDF [24 kb] |
|
Ethers | |||
H2O + (CH3)2O (20:1) | Water + Dimethylether (20:1) | ASCII
[75 kb] SPC [20 kb] PDF [33 kb] |
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H2O + c-C2H4O (approx. 20:1) | Water + Ethylene Oxide (approx. 20:1) | ASCII
[75 kb] SPC [20 kb] PDF [25 kb] |
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Amines | |||
H2O + NH3 | Water + Ammonia | See table below | |
H2O + CH3NH2 | Water + Methylamine (unknown dilution) at T = 16 K | ASCII
[56 kb] SPC [16 kb] PDF [24 kb] |
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Assorted | |||
H2O + N2O (10:1) | Water + Nitrous Oxide (dinitrogen oxide) (10:1) at T = 18 K | ASCII
[57 kb] SPC [16 kb] PDF [21 kb] |
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H2O + HCN (3:1) | Water + Hydrogen Cyanide (3:1) | ASCII
[71 kb] SPC [20 kb] PDF [25 kb] |
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H2O + H2O2 (3%) | Water + Hydrogen Peroxide (3%) at T = 19 K | ASCII
[55 kb] SPC [16 kb] PDF [21 kb] |
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H2O + OCS (20:1) | Water + Carbonyl Sulfide (20:1) at T = 16 K | ASCII
[59 kb] SPC [16 kb] PDF [23 kb] |
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Far-Infrared Spectra
of H2O Ice (read
a detailed description here) |
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Ice History | Description | Available Formats |
---|---|---|
H2O deposited at 14 K and subsequently warmed |
deposit at 14 K | ASCII [28 kb] |
warmed to 40 K | ASCII [25 kb] | |
warmed to 80 K | ASCII [26 kb] | |
warmed to 100 K | ASCII [25 kb] | |
warmed to 120 K | ASCII [24 kb] | |
warmed to 140 K | ASCII [24 kb] | |
warmed to 160 K | ASCII [24 kb] | |
H2O deposited at 160 K and subsequently cooled |
deposit at 160 K | ASCII [24 kb] |
cooled to 140 K | ASCII [24 kb] | |
cooled to 120 K | ASCII [24 kb] | |
cooled to 100 K | ASCII [24 kb] | |
cooled to 80 K | ASCII [24 kb] | |
cooled to 40 K | ASCII [26 kb] | |
cooled to 14 K | ASCII [28 kb] | |
H2O deposited at various temperatures | deposit at 40 K | ASCII [26 kb] |
deposit at 80 K | ASCII [24 kb] | |
deposit at 100 K | ASCII [24 kb] | |
deposit at 120 K | ASCII [24 kb] | |
deposit at 140 K | ASCII [24 kb] | |