Specifically, RF causes excitation of the noble gas which increases the general polarization profile of the atoms of the noble gas. Polarization causes the dimmers to form as the noble gas atoms tend to stick together in response to increasing dipole-dipole interaction.
In addition, increased levels of electromagnetically induced collisions among the various co-resident extra species gas atoms will transfer kinetic energy to these third party atoms which in turn cools the newly formed dimmers. The subsequent application of a spark will ionize the dimmers. This will start the formation of clusters which form around positively charged ions. These clusters are positively charged. Cluster formation will tend to favor magic numbers in their formation which are responsive to energetically favorable structures of the (charged) clusters. The positive charge polarization of these clusters can become very deep when driven by large spark voltages. See: http://web.physik.uni-rostock.de/cluster/students/fp3/HNT_E.pdf Aspects of the ionization of Van der Waals clusters Cheers: Axil On Fri, Aug 17, 2012 at 11:07 AM, James Bowery <[email protected]> wrote: > OK, so if I understand you correctly, since (as your cite states) this > supersonic cooling occurs in all gasses (not just xenon), the "magic" of > xenon really boils down to two things: > > 1) The way it ionizes. > 2) Its tendency to form van der Waals molecules. > > Is that correct? > > Another question: > > You discuss radio frequency effects to create coherent motion, as an > alternative to nozzles, but I didn't see that discussed in your cite. Did > I miss something? > > > On Fri, Aug 17, 2012 at 9:26 AM, Axil Axil <[email protected]> wrote: > >> http://www.ias.ac.in/resonance/December2009/p1210-1222.pdf >> >> Molecule Matters van derWaalsMolecules >> >> See: page 1214 >> 4.1 Supersonic Molecular Beams >> >> Cheers: Axil >> >> On Fri, Aug 17, 2012 at 10:07 AM, James Bowery <[email protected]>wrote: >> >>> On Tue, Aug 14, 2012 at 6:15 PM, Axil Axil <[email protected]> wrote: >>> >>>> On the left is a reservoir at ambient temperature and pressure which is >>>> connected to a vacuum chamber on the right through a nozzle hole. The gases >>>> expand into the chamber through this hole and during this expansion all the >>>> random kinetic energy (translational, rotational and vibrational) gets >>>> converted >>>> >>>> >>>> Cite? >>> >> >> >
