Growth of Large Diameter High-Purity Germanium Crystals for Nuclear Physics Research

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-10ER85953
Agency Tracking Number: 95018
Amount: $1,000,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2011
Solitcitation Year: 2011
Solitcitation Topic Code: 46 b
Solitcitation Number: DE-FOA-0000508
Small Business Information
Phds Co.
777 Emory Valley Road, Suite B, Oak Ridge, TN, 37830-7048
Duns: 141612684
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Richard Pehl
 (865) 414-5434
Business Contact
 Ethan Hull
Title: Dr.
Phone: (865) 481-3725
Research Institution
DOE Nuclear Physics user facilities require larger high-resolution gamma-ray detector systems to provide higher sensitivity measurements. Large diameter germanium crystals are being grown, evaluated, and iteratively improved in the laboratory. Large-diameter crystals will be made into large segmented planar detectors to demonstrate the viability of the crystals and the advanced detection capabilities for DOE Nuclear Physics measurements. Numerous large germanium crystals were grown under varied thermal conditions to eliminate a severe crystallography problem previously observed in the crystals. Excellent gamma-ray energy spectroscopy and uniform impurity concentration were established. Numerous extremely large diameter germanium crystals will be grown using the thermal conditions developed during Phase I. The crystal properties will be fine-tuned to allow fabrication of 150-mm through 200mm diameter germanium detectors. Fully operational large-diameter segmented planar detector systems will be fabricated and evaluated as a demonstration of the technology. Commercial Applications and Other Benefits: In addition to immediate impact at DOE user facilities performing Nuclear Physics and rare-particle detection measurements, the detectors from these larger diameter germanium crystals will impact nuclear security, nuclear cleanup, and nuclear medicine. Molecular imaging in nuclear medicine represents the most significant commercial application. From growing the germanium crystal to constructing a final detector system, the manufacturing process will always require good scientists, engineers, technicians, and association with research scientists at DOE laboratories.

* information listed above is at the time of submission.

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