Nitrogen oxides and carbon chain oxides formed after ion irradiation of CO:N2 ice mixtures

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Table 3

Features detected after ion irradiation of CO and CO:N₂ icy samples and their identification in the range 4700 − 2000 cm^-1.

CO	CO:N₂ = 8:1	CO:N₂ = 1:1	CO:N₂ = 1:8	Assignment
(cm^-1)	(cm^-1)	(cm^-1)	(cm^-1)

–^a	4694	4695	4698	CO₂
–^a	4282	4283	4281	CO
4252	4253	4253	4253	CO
3707	3708	3709	3711	CO₂
3601	3603	3604	3606	CO₂
3069	3070	3070	–	C₃O₂
2398	2399	2399	–	C₃O₂
2346	2347	2348	2349	CO₂
–	–	–	2340	OC¹⁷O
2329	2331	2331	–	OC¹⁸O
–	–	2329	2327	N₂
–	–	2302	–	?
2281	2281	2282	2283	¹³CO₂
–	–	2263	2265	?
2247	2248	2249	2250	C₃O
2242	2243	2244	–	C₃O₂
–	–	2236	2236	N₂O
2231	–	–	–	C₆O + C₈O
2220	2221	–	2223	C₄O
2212	2213	2214	2213	C₅O₂
2201	2200	2200	2201	?
2193	2193	2193	2194	OCC¹³CO + HCNO
2183	2183	–	–	C₇O₂
2180	2181	2181	2182	C₇O
2162	2163	–	2165	C₅?
2139	2139	2140	2140	CO
2122	2123	2125	2125	C₄O₂
2116	2116	2117	2116	C₇O₂
2112	2113	2113	2113	C¹⁷O
2106	2108	2104	2107	C₅O
2092	2093	2093	2093	¹³CO
2088	2089	2089	2089	C¹⁸O
2077	2078	–	–	C₃O₂
2065	2066	2066	–	?
2061	2060	2060	–	C₆O, C₇O ?
2059	2062	2062	2059	C₅O₂
2049	2050	–	2051	?
–	2045	–	–	?
–	2043	2043	2044	CN
2039	2040	–	–	C₃
2027	2028	2028	–	?
2019	2020	–	–	?
2006^*	2008	–	2008	?

Notes.

^(*)

This band was present in the IR spectra only at higher doses.

^(a)

For this sample, the signal-to-noise ratio is too low in this spectral region to identify the presence of this band.

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