Theoretical estimates of the dimensions of charged-particle tracks are conventionally based on Monte Carlo simulation of the trajectories of the primary as well as all secondary particles. The present note expresses the lateral width of a track by an integral over the primary cross-section and thus eliminates the need for simulating the primary trajectory. Expressions are given for the second-order and the fourth-order lateral average over the deposited-energy profile. These relations are applicable to tracks generated by either ionization or collision cascades. As an illustration, an analytical estimate is presented for the width of a collisional track generated by Au ions in Au which is of interest in current experimental work on sputtering by gold clusters.
|Tidsskrift||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Status||Udgivet - apr. 2000|
|Begivenhed||ICACS-18: 18th International Conference on Atomic Collisions in Solids - Odense, Denmark|
Varighed: 3. aug. 1999 → 8. aug. 1999
|Konference||ICACS-18: 18th International Conference on Atomic Collisions in Solids|
|Periode||03/08/1999 → 08/08/1999|
|Sponsor||Carlsbergs mindelegat for Brygger J.C.Jacobson, CRAC, Danfysik A/S, Elsevier Science Publishers, et al.|