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New aspects of the contribution of primary defects of silicon to long-time degradation of detectors operating in high fields of radiation

S. LAZANU1,* , I. LAZANU2

Affiliation

  1. National Institute for Material Physics, POBox MG-7, Bucharest-Măgurele, Romania
  2. University of Bucharest, Faculty of Physics, POBox MG-11, Bucharest-Măgurele, Romania

Abstract

Silicon detectors will be used in the next generation of experiments in high energy physics and bulk damage is the main limitation in their utilisation. Although silicon is the most studied semiconductor, and the studies of defects in silicon have a long history, until now it is not completely established what are all primary defects in silicon, and what are their properties. In this contribution we investigate the new perspective in understanding fundamental phenomena in silicon and implications for the damage of detector characteristics due to the existence of the new primary fourfold coordinated defect, with a lower value of the formation energy in respect to the “classically” known vacancies and interstitials. The effects of its existence at device level are investigated, and possible consequences for the detectors in the next generation of experiments are discussed..

Keywords

Silicon detectors, Radiation damage, Primary defects, New experiments in HEP.

Submitted at: Nov. 14, 2006
Accepted at: June 15, 2007

Citation

S. LAZANU, I. LAZANU, New aspects of the contribution of primary defects of silicon to long-time degradation of detectors operating in high fields of radiation, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 6, pp. 1839-1842 (2007)