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IMAGING NEUTRON ACTIVATION ANALYSIS

Award Information

Agency:
National Science Foundation
Branch:
N/A
Award ID:
11755
Program Year/Program:
1990 / SBIR
Agency Tracking Number:
11755
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Charles Evans & Associates
301 Chesapeake Drive Redwood City, CA 94063
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1990
Title: IMAGING NEUTRON ACTIVATION ANALYSIS
Agency: NSF
Contract: N/A
Award Amount: $49,780.00
 

Abstract:

WE PROPOSE TO CONSTRUCT AND TEST AN IMAGING NEUTRON ACTIVATION ANALYSIS DETECTOR CAPABLE OF DISCERNING ELEMENT CONCENTRATIONS ON A POINT-BY-POINT BASIS. NEUTRON ACTIVATION ANALYSIS IS AN EXTREMELY POWERFUL METHOD FOR MEASURING MAJOR, MINOR, AND TRACE ELEMENT CONCENTRATIONS IN A WIDE VARIETY OF SAMPLES. IN THIS METHOD, ANALYTE ELEMENTSABSORB A NEUTRON TO FORM A RADIONUCLIDE WHICH USUALLY DECAYS BY EMITTING A BETA-PARTICLE AND A GAMMA-RAY. THE GAMMA-RAY ENERGIES ARE CHARACTERISTIC OF THE ANALYTE ELEMENTAND THEY ARE NORMALLY MEASURED WITH A GERMANIUM DETECTOR. SECONDARY ELECTRONS PRODUCED AT A SAMPLE SURFACE AS A BETA-PARTICLE PASSES OUT OF A THIN SAMPLE CAN BE ACCELERATEDAND IMAGED. WHEN GAMMA-RAYS AND BETA-PARTICLES ARE DETECTEDIN COINCIDENCE, THE GAMMA-RAY ENERGY ANSWERS THE QUESTION "WHAT" AND THE SECONDARY ELECTRON POSITION ANSWERS THE QUESTION "WHERE" FOR AN INDIVIDUAL RADIONUCLIDE DISINTEGRATION. THIS INFORMATION WILL BE ORGANIZED INTO ELEMENT MAPS AND LOCAL AREA GAMMA-RAY SPECTRA. IMAGING NEUTRON ACTIVATION ANALYSIS WILL BE USEFUL FOR ANALYSIS OF HETEROGENEOUS SOLIDS. WE ANTICIPATE WIDESPREAD APPLICATIONSIN FIELDS SUCH AS GEOLOGY, BIOLOGY, MATERIALS SCIENCE, AND PARTICLE ANALYSIS.

Principal Investigator:

Ronald H Fleming
Senior Scientist
0

Business Contact:

Small Business Information at Submission:

Evans C & Associates
301 Chesapeake Drive Redwood City, CA 94063

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No