ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Nuclear spin–lattice relaxation times (T1) have been measured for 19F in the CF4 molecule in pure CF4 gas and in Ar, Kr, Xe, N2, CO, HCl, CO2, CH4, SF6, and C2H6, from which the following relaxation cross sections for the rotational angular momentum vector in CF4 have been obtained: σJ/A(ring)2=19.2±0.7 (CF4–Ar), 29.2±0.8 (CF4–Kr), 34.3±0.8 (CF4–Xe), 12.7±0.2 (CF4–N2), 12.8±0.6 (CF4–CO), 22.0±0.1 (CF4–HCl), 29.7±0.7 (CF4–CO2), 12.2±0.2 (CF4–CH4), 39.4±0.8 (CF4–CF4), 58.0±1.2 (CF4–SF6), and 20.8±0.7 (CF4–C2H6). The temperature dependence of these cross sections in the range 210–400 K is essentially T−1 except for (CF4–Ar) and (CF4–CO, N2) for which it is T−0.5 and T−0.7, respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.455208
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