Document Details


Title:
LIQUID SCINTILLATION COUNTING TECHNIQUES FOR THE HIGHER ANTINIDES
Author(s):
Subject Terms:
SCINTILLATION COUNTERS; LIQUID SCINTILLATION DETECTORS; TRANSURANIUM ELEMENTS; PHOSPHORUS; SPECTROSCOPY; ALPHA PARTICLES; URANIUM 233; AMERICIUM 241; AMERICIUM 243; CALIFORNIUM 244; BERKELIUM 249; FISSION PRODUCTS
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1971 Dec 31
Declassification Status:
Never classified
Document Pages:
0014
Accession Number:
NV0045006
Originating Research Org.:
OAK RIDGE NATIONAL LABORATORY
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
LIQUID SCINTILLATION COUNTING PROCEDURES DEVELOPED IN STUDIES OF THE A QUEOUS COMPLEXES OF THE TRIVALENT TRANSPLUTONIUM ACTINIDES AND HAVING 100 PERCENT COUNTING EFFICIENCY, HIGH ACCURACY AND VERY SIMPLE, CONVE NIENT SAMPLE PREPARATION ARE DESCRIBED. LIQUID SCINTILLATION SPECTRA A RE PRESENTED FOR U-233, AM-241, AM-243, CM-244, BK-249, CF-252 AND ES- 253 TAKEN BOTH ON A COMMERCIAL LIQUID SCINTILLATION DETECTOR ( PARKARD TRI-CARB ) AND A SINGLE-PHOTOTUBE INSTRUMENT BUILT FOR OPTIMUM ENERGY RESOLUTION. BOTH INSTRUMENTS GIVE A LINEAR RELATIONSHIP BETWEEN ALPHA ENERGY PEAK AND CHANNEL NUMBER. THE COMMERCIAL INSTRUMENT GAVE AN AVE RAGE ALPHA ENERGY RESOLUTION OF 26 PERCENT WHILE THE ORNL-BUILT DETECT OR GAVE 8.2 PERCENT. UNDER SOME FAVORABLE CONDITIONS IT WAS POSSIBLE T O COUNT ONE ACTINIDE IN THE PRESENCE OF OTHER RADIOTRACER IMPURITIES. CONDITIONS WHERE THIS WAS POSSIBLE, AND EXAMPLES, ARE GIVEN. A SIMPLE EXTRACTIVE SCINTILLATOR CONSISTING OF SCINTILLATORS PLUS A SUITABLE E XTRACTANT IN TOLUENE WAS SHOWN TO BE AN EFFECTIVE MEANS OF PLACING RAD IONUCLIDES IN THE SCINTILLATION MEDIUM. IT WAS DEMONSTRATED THAT SUBSE QUENT REMOVAL OF THE BARREN AQUEOUS PHASE FROM CONTACT WITH THE SCINTI LLATOR WAS NOT NECESSARY, THAT THE SAME COUNTING EFFICIENCY WAS OBTAIN ED WITH AND WITHOUT BULK WATER PRESENT, AND THAT LIQUID SCINTILLATION SPECTRA OBTAINED WITH BULK WATER PRESENT GAVE AS GOOD, OR BETTER, RES OLUTION THAN THOSE TAKEN FROM DRY SCINTILLATOR SOLUTIONS.


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