Comparison of UV and high-energy ion irradiation of methanol:ammonia ice

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Table 1

New bands attributed to irradiation products.

Position^a (cm^-1)	Assignment	Vibration mode	UV after dep.	Zn (620 MeV)

2340	CO₂	CO str.	×	×
2160	OCN⁻	CN str.	×	×
2138	CO	CO str.	×	×
1740	C = O ester/aldehyde	CO str.	×	×
1720	H₂CO	CO str.	×	×
1694	HCONH₂ ?	CO str.	×	×
1587	COO⁻ in carb. ac. salts^b^c	COO⁻ asym. str.	×	×
1498	H₂CO	CH₂ scis.	×	×
1385	CH₃ groups	CH₃ sym. def.	×	×
1347	COO⁻ in carb. ac. salts^b,c	COO⁻ sym. str.	×	×
1303	CH₄	def.	×	×

Notes.

^(a)

Position varies sligthly because of the interaction of species within the matrix;

^(b)

Muñoz Caro & Schutte (2003);

^(c)

Nuevo et al. (2006).

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