The effect of charge collection recovery in silicon p-n junction detectors irradiated by different particles

Verbitskaya, E. et al. (2003) The effect of charge collection recovery in silicon p-n junction detectors irradiated by different particles. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 514(1-3), 47 -61. (doi: 10.1016/j.nima.2003.08.083)

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 gamma-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 p(+) and n(+) 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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: O'Shea, Professor Val and Smith, Professor Kenway and Li, Dr ZhongQiang
• Authors: Verbitskaya, E., Abreu, M., Anbinderis, P., Anbinderis, T., D'Ambrosio, N., De Boer, W., Borchi, E., Borer, K., Bruzzi, M., Buontempo, S., Casagrande, L., Chen, W., Cindro, V., Dezillie, B., Dierlamm, A., Eremin, V., Gaubas, E., Gorbatenko, V., Granata, V., Grigoriev, E., Grohmann, S., Hauler, F., Heijne, E., Heising, S., Hempel, O., Herzog, R., Harkonen, J., Ilyashenko, I., Janos, S., Jungermann, L., Kalesinskas, V., Kapturauskas, J., Laiho, R., Li, Z., Mandic, I., De Masi, R., Menichelli, D., Mikuz, M., Militaru, O., Niinikoski, T.O., O'Shea, V., Pagano, S., Palmieri, V.G., Paul, S., Solano, B.P., Piotrzkowski, K., Pirollo, S., Pretzl, K., Mendes, P.R., Ruggiero, G., Smith, K., Sonderegger, P., Sousa, P., Tuominen, E., Vaitkus, J., Da Via, C., Wobst, E., and Zavrtanik, M.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
• ISSN: 0168-9002
• ISSN (Online): 1872-9576