Dissociative Electron Attachment in Br2 at 296°K
Abstract
Dissociative electron attachment frequencies have been determined for bromine in the presence of helium using microwave cavity techniques. Initial ionization was produced by a single light pulse from a hydrogen flash lamp. The value for the electron attachment coefficient k determined from the attachment frequency data is k=0.82×10-12 cm3 sec-1 +/-10% at 296 °K. The electron-ion ambipolar diffusion coefficient (Da+p) for Br2+ in helium was found to be 795 cm2 Torr sec-1 +/- 10% at 296 °K. The positive-ion-negative-ion ambipolar diffusion coefficient for this ion was found to be 380 cm2 Torr sec-1 +/- 10% at 296 °K under the conditions where the only significant negative ion present was Br-.
- Publication:
-
Physical Review A
- Pub Date:
- August 1971
- DOI:
- 10.1103/PhysRevA.4.613
- Bibcode:
- 1971PhRvA...4..613T