Abstract
Scintillation materials for the spectroscopic detection of gamma photons have been made of inorganic crystals, organic liquid and plastic scintillators. These scintillators are either expensive for large-Area detection or incapable of gamma spectroscopy. We have reported the syntheses of transparent liquids and plastic nanocomposites comprising high loading of high-Z nanoparticles for gamma photoelectric generation and conjugated organic luminescent systems for visible photon generation. Hafnium oxide nanoparticles and cadmium zinc sulfide quantum dots were loaded into the organics up to 60 wt% via methacrylate-Terminated surface functionalization. The liquid scintillator loaded with 40 wt% hafnium oxide nanoparticles demonstrated a light yield of 11699 photons/MeV with an energy resolution of 14.8% for 662 keV gamma. The 60 wt% CZS QD loaded plastic nanocomposite exhibited an optimized light yield of 9275 photons/MeV and produced a gamma photopeak. A radiation hardness study indicates that the loaded liquids and nanocomposites exhibits comparable hardness to the unloaded scintillators.
| Original language | English |
|---|---|
| Title of host publication | Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII |
| Editors | Nerine J. Cherepy, Michael Fiederle, Ralph B. James |
| Publisher | SPIE |
| ISBN (Electronic) | 9781510645141 |
| DOIs | |
| State | Published - 2021 |
| Event | Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII 2021 - San Diego, United States Duration: Aug 1 2021 → Aug 5 2021 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 11838 |
| ISSN (Print) | 0277-786X |
| ISSN (Electronic) | 1996-756X |
Conference
| Conference | Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII 2021 |
|---|---|
| Country/Territory | United States |
| City | San Diego |
| Period | 08/1/21 → 08/5/21 |
Funding
The work reported herein was performed with the financial support of the Defense Threat Reduction Agency DTRA under award number HDTRA 1-18-1-005. This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
Keywords
- Energy resolution
- Nanocomposite
- Nanoparticle
- Quantum dot
- Radiation hardness
- Scintillator