| US 7,525,099 B2 | ||
| Nuclear radiation detection system | ||
| Narsingh Bahadur Singh, Ellicott City, Md. (US); Aaron A. Pesetski, Gamrills, Md. (US); Andre Berghmans, Owing Mills, Md. (US); Brian P. Wagner, Baltimore, Md. (US); David Kahler, Arbutus, Md. (US); David J. Knuteson, Columbia, Md. (US); and Darren Thomson, Ellicott City, Md. (US) | ||
| Assigned to Northrop Grumman Systems Corporation, Los Angeles, Calif. (US) | ||
| Filed on Jan. 30, 2007, as Appl. No. 11/699,335. | ||
| Prior Publication US 2008/0179534 A1, Jul. 31, 2008 | ||
| Int. Cl. G01J 1/42 (2006.01) | ||
| U.S. Cl. 250—372 | 19 Claims |
| 1. A nuclear radiation detection system, comprising:
an optical assembly capable of focusing on a source of radiation;
a UV filter assembly having a narrowband UV crystal filter and positioned to receive light transmitted through the optical
assembly; and
a light detector positioned to receive light transmitted through the UV filter assembly,
wherein the narrowband UV crystal filter is fabricated from crystals selected from the group consisting of nickel fluorosilicate
doped with at least one dopant, nickel fluoroborate doped with at least one dopant, and potassium nickel sulfate doped with
at least one dopant,
wherein said dopant is selected from the group consisting of salts of cobalt, calcium, barium, strontium, lead, copper, germanium,
praseodymium, neodymium, zinc, lithium, potassium, sodium, rubidium, and cesium.
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