WDR-PK-AK-018

Hollister, R

关键词: R FACILITIES;    CALIBRATION;    COLLIMATORS;    EFFICIENCY;    GEOMETRY;    GERMANIUM;    RADIOACTIVITY;    SEALED SOURCES;    SPECTRA;   

DOI  :  10.2172/973642
RP-ID  :  LLNL-TR-416262
PID  :  OSTI ID: 973642
Others  :  TRN: US1002196

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

Method - CES SOP-HW-P556 'Field and Bulk Gamma Analysis'. Detector - High-purity germanium, 40% relative efficiency. Calibration - The detector was calibrated on February 8, 2006 using a NIST-traceable sealed source, and the calibration was verified using an independent sealed source. Count Time and Geometry - The sample was counted for 20 minutes at 72 inches from the detector. A lead collimator was used to limit the field-of-view to the region of the sample. The drum was rotated 180 degrees halfway through the count time. Date and Location of Scans - June 1,2006 in Building 235 Room 1136. Spectral Analysis Spectra were analyzed with ORTEC GammaVision software. Matrix and geometry corrections were calculated using OR TEC Isotopic software. A background spectrum was measured at the counting location. No man-made radioactivity was observed in the background. Results were determined from the sample spectra without background subtraction. Minimum detectable activities were calculated by the Nureg 4.16 method. Results - Detected Pu-238, Pu-239, Am-241 and Am-243.