Publication at Faculty of Mathematics and Physics |
2010
Abstract
We focused on the determination of the relation between charging conditions and the field-emission mechanism because this emission limits positive charges that dust grains can acquire due to photoemission, secondary emission, or ion attachment. We have found that the sources of these atoms are either the surrounding gas or the ions implanted into the grain and leaving it due to diffusion.
The diffusion can be described by two time constants differing by an order of magnitude.