Behavior of Excess Electrons in Supercriticai - Electron Attachment - BNL - 66560 Fluids
نویسندگان
چکیده
The behavior of excess electrozis in supercritical ethane was investigated by measiuing mobility and reaction rates. Nobilities were measured by means of a time-of-flight method at 306-320K as a function of pressure. Mobility values decreased at all temperatures with increasing pressure, but showed a small minimum or a shoulder at the pressure where the .. .. .. compressmmy X7has a peak. Electron attachment to COZ, NO, pyrimidine and n m . ..-. AL.--—.-—_-.-A___ —---------A.JI-A -~zre UVGI LUG XllUG LCIUpClilLUl G lilU& ‘W>LUUIGU ~ d fimction of pressure. Both attachment rate constants k. %. NC) OTIA P-E. m)rl .arn,;lihri,,rn r.nmct.n+. W=b h .“. . . v -~ “~. q> -.= .ywu...— ““u”--..\ ..~ / J.~. ) for C02 and pyrimidine increased sharply at pressures of X7 peaks. Activation volumes Va*and reaction volumes AVr are very large and negative in the critical region. The volume change is mainly due to electrostriction around ions formed. The results are compared to volume changes predicted by, a compressible continuum model.
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