Effects of Neutron Irradiation and Thermal Annealing on Model Alloys Using Positron Annihilation Techniques

2008 ◽  
pp. 247-247-15
Author(s):  
ES Cumblidge ◽  
GL Catchen ◽  
AT Motta ◽  
G Brauer ◽  
J Böhmert
Keyword(s):  
Positron Annihilation ◽  
Thermal Annealing ◽  
Neutron Irradiation

Rapid Thermal Annealing of Neutron Transmutation Toped Czochralski Silicon

1992 ◽  
Vol 262 ◽  
Author(s):  
G. M. Berezina ◽  
F. P. Kdrshunov ◽  
N. A. Sobolev ◽  
A. V. Voevodova ◽  
A. A. Stuk
Keyword(s):  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Neutron Irradiation ◽  
Irradiation Temperature ◽  
Electrical Parameters ◽  
Furnace Annealing ◽  
Annealing Behaviour ◽  
Czochralski Silicon ◽  
Neutron Transmutation

ABSTRACTThe influence of the rapid thermal annealing (RTA) in comparison with that of the standard furnace annealing (FA) on the electrical parameters and photoluminescence (PL) of Czochralski silicon (Cz Si) subjected to neutron irradiation at various temperatures has been studied. The role of the irradiation temperature on the annealing behaviour of electrical parameters in Cz Si has been established. The possibility of getting neutron transmutation doped (NTD) Cz Si having the calculated resistivity by means of the RTA is shown.

scholarly journals Thermal Annealing of Recoil Atoms in Neutron Irradiation of Inorganic Phosphorus Compounds

1961 ◽  
Vol 34 (4) ◽  
pp. 590-591 ◽  
Author(s):  
Hiroshi Baba ◽  
Kenji Yoshihara ◽  
Hiroshi Amano ◽  
Kichizo Tanaka ◽  
Nagao Shibata
Keyword(s):  
Thermal Annealing ◽  
Neutron Irradiation ◽  
Inorganic Phosphorus ◽  
Phosphorus Compounds ◽  
Recoil Atoms

Changes in positron annihilation characteristics in molybdenum induced by neutron irradiation

1975 ◽  
Vol 32 (2) ◽  
pp. 417-426 ◽  
Author(s):  
Kurt Petersen ◽  
Mads Knudsen ◽  
R. M. J. Cotterill
Keyword(s):  
Positron Annihilation ◽  
Neutron Irradiation

Recent Progress on the Positron Annihilation Experiments on Irradiated Ferritic/Martensitic Steels Containing Helium

2021 ◽  
Vol 1024 ◽  
pp. 1-12
Author(s):  
Vladimir Krsjak
Keyword(s):  
Radiation Damage ◽  
Positron Annihilation ◽  
Neutron Irradiation ◽  
Early Stage ◽  
High Sensitivity ◽  
Positron Annihilation Spectroscopy ◽  
Martensitic Steels ◽  
Positron Annihilation Lifetime ◽  
Induced Defects

The well-known and often acceptable radiation tolerance of ferritic/martensitic (f/m) steels can be severely diminished when neutron irradiation is accompanied by the production of helium. The presence of helium in the irradiated materials changes the kinetics of the nucleation, recombination, and clustering of the radiation-induced defects. High production rates of helium may lead to a non-negligible volumetric bubble swelling at relatively low temperatures. Extrapolation of the knowledge gained from neutron irradiation experiments to fusion or spallation environments is additionally complicated due to the unknown and comprehensive effects of dpa rate, temperature, the presence of sinks in the crystal lattice and others. To improve the understanding of the microstructure and irradiation parameters effects, close attention must be paid to the early stages of the radiation damage. It is expected that the pre-existing vacancy-type defects, attributed to lattice distortion at the grain/subgrain boundaries and oxide-matrix interfaces, are effective sinks for primary defects and helium, i.e. they control the formation and growth of helium-vacancy agglomerations. This early-stage radiation damage, however, cannot be captured by conventional transmission electron microscopy, and thus other experimental techniques are called for. One of the most perspective experimental approaches to investigate small vacancy-type defects, with a high sensitivity to confined helium, is to utilize positron annihilation spectroscopy (PAS). In particular, two spectroscopy techniques, positron annihilation lifetime spectroscopy (PALS) and Doppler broadening spectroscopy (DBS) of the annihilation line, can be beneficially used for the characterization of helium-vacancy clusters. This paper reviews the recent positron annihilation spectroscopy characterization of various irradiation experiments involving helium. Mainly two types of irradiation experiments are addressed, helium implantation and spallation neutron source irradiation experiments. Discussion is aimed at the potential of PAS in the early-stage formation of helium bubbles and the investigation of the effects of irradiation parameters in defect production and accumulation.

Sign in / Sign up

Export Citation Format

Share Document