کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1887386 1533547 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Behavior of charged species in supercritical heavy rare gas fluids
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
Behavior of charged species in supercritical heavy rare gas fluids
چکیده انگلیسی

Electron mobilities were measured in supercritical (SC) Xe and Kr as functions of pressure and temperature. Ion mobilities, reaction rates of electrons with C6F6, O2 and pyrazine were also measured in SC Xe. Electron mobility is strongly field-dependent and the low-field mobility μe exhibits a deep minimum at a density just below the critical density. A deformation potential model of the acoustic phonon scattering type can reproduce μe change in SC Xe and Kr quantitatively. From positive ion mobility values, a hydrodynamic compressible continuum model indicates that the cluster radius goes to a maximum, 1 nm, at 291 K at the pressure of the isothermal compressibility, χT, peak. The rate constant for the reaction C6F6+e−→C6F6– sharply increases up to nearly 1015 molal s−1 in this pressure region. Pyrazine was found to form neutral clusters in SC Xe prior to electron attachment. These and other data are compared with the observation made in SC ethane.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 76, Issues 8–9, August–September 2007, Pages 1225–1228
نویسندگان
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