Knowledge Bank

Samples of the Freon 11-14 series $(CFnCl4-n,n1-4)$ at high dilution in argon were deposited at 15$\circ K$ during simultaneous 2.0 keV proton beam irradiation. And the products studied by infrared spectroscopy. Exceedingly large yields of the primary radicals $CCl3,CFC12,CF2Cl$ and $CF3$ were formed in the various experiments ; in addition, several other absorptions were observed and have been assigned to a number of new molecular species. It is believed that some molecular ions were trapped in electrically neutral species of the type $CFC12+Cl-$ , while others were trapped as isolated ions; the isolated ions were readily destroyed by photobleaching and neutralization with thermal electrons from an exposed bulb filament. Samples of the Freon 11-14 series at high dilution in argon were also deposited and simultaneously photolyzed by argon resonance radiation from a microwave discharge. While the trihalomethyl radicals were principal products of the proton beam irradiation, these radicals were produced in very low yield by photolysis+ADs- instead, the electrically neutral ion-paired species were predominately formed. The spectra and structure of the products formed in those experiments will be discussed.