| Autor: |
McKellar, A. R. W., Mizoguchi, Asao, Kanamori, Hideto |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 9/28/2011, Vol. 135 Issue 12, p124511, 11p |
| Abstrakt: |
Spectra of solid para-H2 doped with CH3F at 1.8 K are studied in the ν3 region (∼1040 cm-1) using a quantum cascade laser source. As shown previously, residual ortho-H2 in the sample (∼1000 ppm) gives rise to distinct spectral features due to clusters of the form CH3F-(ortho-H2)N, with N = 0, 1, 2, 3, etc. Brief annealing at 7 K is found to give narrower spectral lines (≥0.006 cm-1) than conventional (5 K) annealing, and causes the N = 3 and 4 lines to fragment into two or more components. The N = 3 line is observed to be particularly stable and persistent. The N = 0 line (no ortho-H2 neighbors) is resolved into two closely spaced (≈0.007 cm-1) components which are assigned to the K = 0 and 1 states of CH3F rotating around its C3v symmetry axis (ortho- and para-CH3F, respectively). Similar K-structure is also evident for other lines. Weak but persistent features ('N = 1/2 lines') are observed mid way between N = 0 and 1. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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