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Table 1
Comparison of peak positions, assignments, and characterizations of CH4 daughter molecules at 220 MeV 16O+7, a fluence of 4.29 × 1019 ions/cm2.
| Position (cm-1) | Assignment | Molecules | Characterization | Reference |
| this work | ||||
|
|
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| 4165 | – | – | – | – |
| 4070 | – | – | – | – |
| 3267 | ν3 | C2H2 | CH stretch | 2, 3, 4 |
| 3248 | ν | H-C ≡ C-R | (C-H) | 1 |
| 3150 | ν3 | CH3 | CH stretching | 4 |
| 3095 | ν9 | C2H4 | CH2 asym. str. | 3, 4 |
| 2975 | ν10 | C2H6 | CH3 deg. str. | 1, 3, 4 |
| 2962 | ν1 | C2H6 | CH3 sym. str. | 4 |
| ν11 | C2H4 | – | 2 | |
| νas | R-CH3 | (C-H) | 1 | |
| 2941 | ν8 + ν11 | C2H6 | Combination | 4 |
| 2935 | νas | R-C2-R | (CH) | 1 |
| 2915 | ν8 + ν11 | C2H6 | Combination | 4 |
| – | C3H8 | – | 1 | |
| 2884 | ν5 | C2H6 | CH3 sym. str. | 1, 3, 4 |
| 2874 | νs | R-CH3 | (CH) | 1, 2 |
| 2850 | ν8 | R-CH2-R | (C-H) | 1 |
| 2744 | – | – | – | – |
| 2651 | – | – | – | – |
| 2611 | – | – | – | – |
| 2593 | – | – | – | – |
| 1645 | – | – | – | – |
| 1463 | ν11 | C2H6 | CH3 d-deform | 1, 3, 4 |
| 1436 | ν12 | C2H4 | CH2 scissor | 2, 3, 4 |
| 1387 | ν4 + ν5 | C2H2 | – | 2 |
| 1375 | ν6 | C2H6 | CH3 sym. def. | 1, 3, 4 |
| δ8 | C3H8 | R-CH3 | 1 | |
| 952 | ν7 | C2H4 | CH2 wag | 2, 4 |
| 911 | – | R2C = CH2 | δ (CH) out-of-plane | 1 |
| 821 | ν12 | C2H6 | CH3 rock | 1, 3, 4 |
| ν9 | C2H6 | – | 2 | |
| 750 | – | C3H8 | – | 1 |
| 736 | ν5 | C2H2 | CH bend | 2, 4 |
| 608 | ν2 | CH3 | Out of plane | 1, 2, 3, 4 |
References. (1) Gerakines et al. (1996), (2) Kaiser et al. (1998), (3) Moore et al. (2003), and (4) Bennett et al. (2006).
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