Doped luminescent materials and particle discrimination using same
| DWPI Title: Making material for particle detection, comprises providing host material, which is configured to generate excited singlet and triplet states responsive to excitation and doping material with a quantity of heavy atoms |
| Abstract: Doped luminescent materials are provided for converting excited triplet states to radiative hybrid states. The doped materials may be used to conduct pulse shape discrimination (PSD) using luminescence generated by harvested excited triplet states. The doped materials may also be used to detect particles using spectral shape discrimination (SSD). |
| Use: The method is useful for making a material for particle detection, where the particle comprises an energetic electron, proton (both preferred) and ion (claimed). The material is useful: for converting excited triplet states to radiative hybrid states, and conducting pulse shape discrimination using luminescence generated by harvested excited triplet states; and to detect other analytes (oxygen). |
| Advantage: The luminophore: enhances luminescence harvesting from triplet states; and allows for a portion of the luminescence generated by the doped material to be independent of the host material, thus achieving independent control of wavelength and/or decay time. The material: enhances the efficacy of the pulse shape discrimination; and produces a faster decaying delayed luminescence, which increases speed of detection, as the background luminescence may not accumulate due to the faster decay. |
| Novelty: Making a material (302) for particle detection, comprises: providing a host material, where the material is configured to generate excited singlet and triplet states responsive to excitation; and doping the material with a quantity of heavy atoms, where the quantity of heavy atoms are configured to generate luminescence from at least a portion of the excited triplet states, and the quantity is sufficient to generate detectable luminescence from the excited triplet states, and the quantity is insufficient to quench substantially all luminescence from the excited singlet states. |
| Filed: 11/10/2010 |
| Application Number: US2010943708A |
| Tech ID: SD 11572.5 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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