Accession Number : ADA267959


Title :   Energy Deposition Fluctuations Induced by Ions in Microvolumes and Nanovolumes - An Analytic Approach. 1. Theory


Descriptive Note : Final rept.,


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Xapsos, Michael A ; Burke, Edward A ; Summers, Geoffrey P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267959.pdf


Report Date : 22 Jul 1993


Pagination or Media Count : 66


Abstract : A new analytic method is developed for calculating fluctuations in energy deposition induced by ions in sites having dimensions as small as one nanometer. The method considers two contributions to the fluctuation phenomena. The first is due to direct ion interactions with the site. The second is due to secondary electrons that strike the site but which are produced by ion interactions in the surrounding medium. Particular attention is given to the way the two contributions are combined to describe the complete stochastic process. This analytic combination of the two contributions has not previously been developed in the context of microdosimetry where Monte Carlo simulations are often used to describe the combined processes. The new analytic approach is much more versatile than Monte Carlo methods and can easily be applied to different incident radiations, target materials and target geometries. In addition to its versatility and convenience, the physical factors which contribute to the fluctuations in energy deposition are brought clearly into focus. ... Energy deposition fluctuations, Nanovolumes, Microdosimetry, Microvolumes


Descriptors :   *RADIATION , *STATISTICAL ANALYSIS , *DOSIMETRY , SIMULATION , STOCHASTIC PROCESSES , DISTRIBUTION , MATERIALS , ENERGY , DEPOSITION , MATHEMATICAL ANALYSIS , IONIZATION , EQUATIONS , MICROELECTRONICS , ELECTRONS , MONTE CARLO METHOD , THEORY , QUANTITY , MODELS , IONS


Subject Categories : Radiation and Nuclear Chemistry
      Radioactiv, Radioactive Wastes & Fission Prod


Distribution Statement : APPROVED FOR PUBLIC RELEASE