Speaker
Dr
Zheng Li
(Brookhaven National laboratory)
Description
For the development of radiation hard Si detectors for the SiD BeamCal program for International Linear Collider (ILC), n-type MCZ Si detectors were irradiated first by fast neutrons to fluences of 1.5x10^14 and 3x10^14 neq/cm2, and then by gamma. It is found that gamma radiation has suppressed reverse annealing in neutron irradiated detectors which were subject to gamma radiation during the 5.5 month room temperature annealing (RTA). The impressive effect is that in this mixed irradiation reverse annealing is totally suppressed by the same dose of gamma (500 Mrad) regardless of the neutron fluence. The following RTA of six months showed that suppression occurs only during gamma radiation that suggests some nonlinear effect, or interaction of radiation induced acceptor-type and donor-type defects.
Author
Dr
Elena Verbitskaya
(Ioffe Physical Technical Institute RAS)
Co-authors
Dr
Jaakko Härkönen
(Helsinki Institute of Physics)
Jessica Metcalfe
(University of New Mexico)
Dr
Jim Kierstead
(Brookhaven National laboratory)
Dr
Martin Hoeferkamp
(University of New Mexico)
Dr
Rubie Gul
(Brookhaven National laboratory)
Sally Seidel
(University of New Mexico)
Dr
Vladimir Eremin
(Ioffe Physical Technical Institute RAS)
Dr
Zheng Li
(Brookhaven National laboratory)
