TY - JOUR
T1 - Gamma radiation induced space charge sign inversion and re-inversion in p-type MCZ Si detectors and in proton-irradiated n-type MCZ Si detectors
AU - Li, Z.
AU - Bruzzi, M.
AU - Eremin, V.
AU - Härkönen, Jaakko
AU - Kierstead, J.
AU - Luukka, Panja
AU - Menichelli, D.
AU - Tuominen, Eija
AU - Tuovinen, Esa
AU - Verbitskaya, E.
PY - 2005
Y1 - 2005
N2 - Positive space charge build-up was observed in proton-and neutron-irradiated high-resistivity magnetic Czochralski (MCZ) n-type Si detectors after gamma radiation. Space charge sign re-inversion (SCSRI) from negative to positive was achieved at the high dose of 454 Mrad in a low-fluence proton irradiated MCZ Si detector. No SCSRI has been observed yet for low-fluence neutron-irradiated MCZ Si detectors at the highest dose in this study (662 Mrad), but positive space charge is building up, and SCSRI is expected at higher doses. Up to the highest dose in this study, the double junction or double peak electric field distribution is still preserved even after SCSRI. No SCSRI was observed in control FZ Si detectors. Space charge sign inversion was also observed in high-resistivity as-processed MCZ p-type Si detectors after gamma radiation. (c) 2005 Elsevier B.V. All rights reserved.
AB - Positive space charge build-up was observed in proton-and neutron-irradiated high-resistivity magnetic Czochralski (MCZ) n-type Si detectors after gamma radiation. Space charge sign re-inversion (SCSRI) from negative to positive was achieved at the high dose of 454 Mrad in a low-fluence proton irradiated MCZ Si detector. No SCSRI has been observed yet for low-fluence neutron-irradiated MCZ Si detectors at the highest dose in this study (662 Mrad), but positive space charge is building up, and SCSRI is expected at higher doses. Up to the highest dose in this study, the double junction or double peak electric field distribution is still preserved even after SCSRI. No SCSRI was observed in control FZ Si detectors. Space charge sign inversion was also observed in high-resistivity as-processed MCZ p-type Si detectors after gamma radiation. (c) 2005 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.nima.2005.06.003
DO - 10.1016/j.nima.2005.06.003
M3 - Article
SN - 0168-9002
VL - 552
SP - 34
EP - 42
JO - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-2
ER -