GROWTH OF LEAD CARBONATE SCINTILLATOR CRYSTALS

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$49,868.00
Award Year:
1991
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
17035
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Crystal Research
1441 Sunnyside Terr, San Pedro, CA, 90732
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
THIS PROJECT RESPONDS TO A NEED FOR LARGE-VOLUME, HIGH-DENSITY, HIGH-Z SCINTILLATOR CRYSTALS FOR ANTI-COINCIDENCE SHIELDING OF GAMMA-RAY ASTRONOMY DETECTORS. THE COMBINED REQUIREMENTS OF HIGH CAPTURE PROBABILITY AND ULTRASHORT COINCIDENCE WINDOWS (DECAY TIMES) CLOSELY RESEMBLE THE REQUIREMENTS FOR POSITRON EMISSION TOMOGRAPHY (PET) SCINTILLATORS. A RECENT EXTENSIVESURVEY AT THE LAWRENCE BERKELEY LABORATORY INDICATES THAT CERUSSITE (NATURALLY OCCURRING PBCO3) IS THE BEST MATERIAL FOUND TO DATE FOR BOTH APPLICATIONS. AT PRESENT, NO TECHNIQUE FOR THE GROWTH OF LARGE, PURE PBCO3 CRYSTALS HAS BEEN DEVELOPED. THE PROJECT WILL EXPLORE THREE NOVEL TECHNIQUES AND DEVELOP ONE FOR THE COMMERCIAL PRODUCTION OF LARGE, PURE, OPTICALLY PERFECT LEAD CARBONATE SCINTILLATOR CRYSTALS. THIS PROJECT RESPONDS TO A NEED FOR LARGE-VOLUME, HIGH-DENSITY, HIGH-Z SCINTILLATOR CRYSTALS FOR ANTI-COINCIDENCE SHIELDING OF GAMMA-RAY ASTRONOMY DETECTORS. THE COMBINED REQUIREMENTS OF HIGH CAPTURE PROBABILITY AND ULTRASHORT COINCIDENCE WINDOWS (DECAY TIMES) CLOSELY RESEMBLE THE REQUIREMENTS FOR POSITRON EMISSION TOMOGRAPHY (PET) SCINTILLATORS. A RECENT EXTENSIVESURVEY AT THE LAWRENCE BERKELEY LABORATORY INDICATES THAT CERUSSITE (NATURALLY OCCURRING PBCO3) IS THE BEST MATERIAL FOUND TO DATE FOR BOTH APPLICATIONS. AT PRESENT, NO TECHNIQUE FOR THE GROWTH OF LARGE, PURE PBCO3 CRYSTALS HAS BEEN DEVELOPED. THE PROJECT WILL EXPLORE THREE NOVEL TECHNIQUES AND DEVELOP ONE FOR THE COMMERCIAL PRODUCTION OF LARGE, PURE, OPTICALLY PERFECT LEAD CARBONATE SCINTILLATOR CRYSTALS.

* information listed above is at the time of submission.

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