Back to Search
Start Over
The effect of charge collection recovery in silicon p–n junction detectors irradiated by different particles
- Source :
-
Nuclear Instruments & Methods in Physics Research Section A . Nov2003, Vol. 514 Issue 1-3, p47. 15p. - Publication Year :
- 2003
-
Abstract
- The recovery of the charge collection efficiency (CCE) at low temperatures, the so-called ”Lazarus effect”, was studied in Si detectors irradiated by fast reactor neutrons, by protons of medium and high energy, by pions and by gamma-rays. The experimental results show that the Lazarus effect is observed: (a) after all types of irradiation; (b) before and after space charge sign inversion; (c) only in detectors that are biased at voltages resulting in partial depletion at room temperature. The experimental temperature dependence of the CCE for proton-irradiated detectors shows non-monotonic behaviour with a maximum at a temperature defined as the CCE recovery temperature. The model of the effect for proton-irradiated detectors agrees well with that developed earlier for detectors irradiated by neutrons. The same midgap acceptor-type and donor-type levels are responsible for the Lazarus effect in detectors irradiated by neutrons and by protons. A new, abnormal “zigzag”-shaped temperature dependence of the CCE was observed for detectors irradiated by all particles (neutrons, protons and pions) and by an ultra-high dose of <f>γ</f>-rays, when operating at low bias voltages. This effect is explained in the framework of the double-peak electric field distribution model for heavily irradiated detectors. The redistribution of the space charge region depth between the depleted regions adjacent to <f>p+</f> and <f>n+</f> contacts is responsible for the “zigzag”- shaped curves. It is shown that the CCE recovery temperature increases with reverse bias in all detectors, regardless of the type of radiation. [Copyright &y& Elsevier]
- Subjects :
- *ELECTRIC fields
*IRRADIATION
*NEUTRONS
*PIONS
Subjects
Details
- Language :
- English
- ISSN :
- 01689002
- Volume :
- 514
- Issue :
- 1-3
- Database :
- Academic Search Index
- Journal :
- Nuclear Instruments & Methods in Physics Research Section A
- Publication Type :
- Academic Journal
- Accession number :
- 11425680
- Full Text :
- https://doi.org/10.1016/j.nima.2003.08.083