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IMAGING NEUTRON ACTIVATION ANALYSIS

Award Information

Agency:
National Science Foundation
Branch:
N/A
Award ID:
17149
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
17149
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 2
Fiscal Year: 1991
Title: IMAGING NEUTRON ACTIVATION ANALYSIS
Agency: NSF
Contract: N/A
Award Amount: $224,945.00
 

Abstract:

CHARLES EVANS & ASSOCIATES WILL 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 CONCENTRATIONSIN A WIDE VARIETY OF SAMPLES. IN THIS METHOD, ANALYTE ELEMENTS ABSORB 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 ELEMENT AND 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 ACCELERATED AND IMAGED. WHEN GAMMA RAYS AND BETA-PARTICLES ARE DETECTED IN 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. WIDESPREAD APPLICATIONS IN FIELDS SUCH AS GEOLOGY, BIOLOGY, MATERIALS SCIENCE, AND PARTICLE ANALYSIS ARE ANTICIPATED.

Principal Investigator:

Ronald H. Fleming
Principal Investigator
0

Business Contact:


4153694567
Small Business Information at Submission:

Charles Evans & Associates
301 Chesapeake Dr Redwood City, CA 94063

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