Neutron Spectrometer, Real-Time Dosimeter and Methodology using Three-Dimensional Optical Memory
Section: For Industry
Category(ies): Other
Reference #: MOMA430503
OTC Contact: Shoji Takahashi, M.D., Ph.D (Directory Information | Send a Message)
Description
The fraction of radiation dose from neutrons received by radiation workers is increasing as a result of growth in the nuclear power industry, the development of nuclear reactor technology and the potential use of neutrons for radiotherapy. Traditional methods of neutron dosimetry have lacked the energy response and sensitivity necessary to meet the more exacting needs of today's neutron applications. Georgetown University is seeking a partner to license a novel neutron spectrometer which solves the problems inherent in previous technology.
Applications
- Improved sensitivity at high and low neutron energy levels.
- Lower energy dependence.
- Improved characterizing of exposure energy spectrum, thereby permitting a more accurate neutron dose measurement.
Advantages
Stage of Development
The present invention takes an entirely new approach to high linear energy transfer radiation (LET) dosimetry that is characterized through the use of an optical memory device. This memory device is composed of a volume of material containing a photoactive substance wherein an energy induced three-dimensional inhomogeneity pattern may be produced and/or detected optically through the use of directed electromagnetic radiation. More specifically, the invention uses a two photon based, three-dimensional optical random access memory (3-D ORAM). The 3-D ORAM is typically a cubic transparent polymer doped with a light sensitive chemical that can be written and read using two laser beams that simultaneously strike the material to alter the optical characteristics therein. When in use, information is stored on the 3-D ORAM, then the ORAM is exposed to neutron or other high LET radiation which alters the information stored in the ORAM as a function of the radiation to which it was exposed. This information is then retrieved and analyzed.
Thus, this technology provides a measurement that is many orders of magnitude greater in sensitivity than that which is afforded by existing neutron dosimetry methods at both high and low energies.
Relevant Publications
No references or resources available.
Patent Status
US Patent 5,498,876
