High Efficiency, Room Temperature Semiconductor Detectors

Award Information
Agency:
Department of Homeland Security
Branch
n/a
Amount:
$100,000.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
NBCHC050129
Agency Tracking Number:
0511094
Solicitation Year:
2005
Solicitation Topic Code:
H-SB05.1-002
Solicitation Number:
n/a
Small Business Information
Radiation Monitoring Devices, Inc.
44 Hunt Street, Watertown, MA, 02472
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
William Higgins
(617) 668-6831
BHiggins@RMDInc.com
Business Contact:
Cynthia Korhonen
(617) 668-6810
CKorhonen@RMDInc.com
Research Institution:
n/a
Abstract
Prevention of the spread of nuclear weapons has reached a state of heightened urgency since the events on September 11, 2001. Gamma ray spectrometers are important tools in homeland security to check the spread of nuclear materials and weapons. Important requirements for gamma ray spectrometers used in this application include good energy resolution, high detection efficiency, compact size, light weight, easy portability and low power consumption. None of the currently available detectors meet all of these requirements. In the proposed effort, we plan to explore a wide bandgap semiconductor material, thallium bromide (TlBr), as a room temperature detector for nuclear monitoring. TlBr has high density (7.5 g/cm3) and atomic number constituents for high gamma ray stopping power, and high resistivity (>1010 Wcm) for low noise device operation. Furthermore, the material melts congruently at a modest temperature (480 ¿ C), which allows use of melt-based crystal growth approaches to produce large volume crystals. Recent results indicate that through sufficient material purification, charge transport properties approaching those of CZT can be achieved. The goal of the proposed project is to perform rigorous investigation of purification and crystal growth of this promising material to produce high performance TlBr gamma-ray spectrometers for homeland security.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government