| Title: |
CONFOCAL FLUORESCENT IMAGING OF TRACKS FROM HEAVY CHARGED PARTICLES UTILISING NEW Al2O3:C,Mg CRYSTALS |
| Authors: |
Akselrod, Mark S.; Yoder, R. Craig; Akselrod, Gleb M. |
| Publisher Information: |
Oxford University Press |
| Publication Year: |
2006 |
| Collection: |
HighWire Press (Stanford University) |
| Subject Terms: |
SSD 2004 Special Issue Articles |
| Description: |
A completely optical, non-destructive imaging of tracks in a fluorescent crystal provides a new way to detect and to assess doses from heavy charged particles and neutrons. The technique combines confocal fluorescent microscopy with a new radiation-sensitive, luminescent material based on aluminium oxide single crystals doped with carbon, magnesium and having aggregate oxygen vacancy defects (Al 2 O 3 :C,Mg). Radiation-induced colour centres in the new material have an absorption band at 620 nm and produce fluorescence at 750 nm with a high quantum yield and a short, 75 ± 5 ns, fluorescence lifetime. Three-dimensional spatial distribution of fluorescent intensity allows one to obtain depth-dose distributions and to discriminate between high- and low-linear energy transfer radiations. Images of single tracks produced by different types of radiation have been obtained. Irradiations with a calibrated 241Am alpha source showed high efficiency for track detection. Thermal neutrons were detected using a nuclear reaction with a 6LiF radiator and production of alpha particles and tritium ions. Fast neutrons were detected using recoil protons produced in a polyethylene radiator installed in front of the crystalline detector. Three-dimensional reconstruction of a recoil proton propagating through the crystal was demonstrated. |
| Document Type: |
text |
| File Description: |
text/html |
| Language: |
English |
| Relation: |
http://rpd.oxfordjournals.org/cgi/content/short/nci664v1; http://dx.doi.org/10.1093/rpd/nci664 |
| DOI: |
10.1093/rpd/nci664 |
| Availability: |
http://rpd.oxfordjournals.org/cgi/content/short/nci664v1; https://doi.org/10.1093/rpd/nci664 |
| Rights: |
Copyright (C) 2006, Nuclear Technology Publishing |
| Accession Number: |
edsbas.404ADF8D |
| Database: |
BASE |