1997
DOI: 10.6028/jres.102.035
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A compendium on the NIST radionuclidic assays of the massic activity of Ni-63 and Fe-55 solutions used for an international intercomparison of liquid scintillation spectrometry techniques

Abstract: The National Institute of Standards and Technology recently participated in an international measurement intercomparison for 63Ni and 55Fe, which was conducted amongst principal national radionuclidic metrology laboratories. The intercomparison was sponsored by EUROMET, and was primarily intended to evaluate the capabilities of liquid scintillation (LS) spectrometry techniques for standardizing nuclides that decay by low-energy β-emission (like 63Ni) and by low-Z (atomic number) electron capture (like 55Fe). T… Show more

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Cited by 17 publications
(4 citation statements)
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“…Similarly, the need to understand the cocktail-composition systematics, such as the eects of the aqueous mass fraction (Colle and Zimmerman, 1996a,b) or ionic loading (as it aects cocktail stability and what has been termed cocktail tractability'), is critical (Colle , 1998). Zimmerman and Colle (1997a), Colle (1997c) and Colle and Zimmerman (1997) have also identi®ed and addressed some of the critical underlying assumptions regarding the method's applicability. They too (Colle and Zimmerman, 1996b) have developed and presented a detailed uncertainty model for the CIEMAT/NIST method's measurement process.…”
Section: On the Ls Eciency-tracing Methodologymentioning
confidence: 99%
See 1 more Smart Citation
“…Similarly, the need to understand the cocktail-composition systematics, such as the eects of the aqueous mass fraction (Colle and Zimmerman, 1996a,b) or ionic loading (as it aects cocktail stability and what has been termed cocktail tractability'), is critical (Colle , 1998). Zimmerman and Colle (1997a), Colle (1997c) and Colle and Zimmerman (1997) have also identi®ed and addressed some of the critical underlying assumptions regarding the method's applicability. They too (Colle and Zimmerman, 1996b) have developed and presented a detailed uncertainty model for the CIEMAT/NIST method's measurement process.…”
Section: On the Ls Eciency-tracing Methodologymentioning
confidence: 99%
“…A few measurements were also performed with our`system P'. The principal operating characteristics of the two spectrometers have been outlined previously (Colle and Kishore, 1997;Colle and Zimmerman, 1997). Descriptions of these operating characteristics, their respective performance and use within this laboratory for various radionuclidic calibrations are available (Colle , 1993(Colle , , 1995(Colle , , 1997bColle and Thomas, 1993;Colle et al, 1995;Zimmerman, 1996b, 1997;Colle and Kishore, 1997).…”
Section: On the Ls Cocktail Preparations Ls Spectrometers And Measurmentioning
confidence: 99%
“…The density of the HNO3 diluent was determined to be (1.031 ± 0.002) g•mL -1 at 21 °C. 1 The entire stock solution was dispensed, for subsequent use, into 18 glass ampoules, each containing about 5 mL of solution, and flame sealed. Two of these stock solution ampoules were used to prepare SRM 4328c in 2007 and SRM 4328d in 2022.…”
Section: Th Stock Materialsmentioning
confidence: 99%
“…In our laboratory, LS measurements are made with two commercial counting systems: System B-a Beckman LS7800 with two phototubes that function in a sum-coinci- dence mode, a logarithmic pulse amplifier, and an external 137 Cs source for quench monitoring-and System P-a Packard Instruments Model A2500TR, which is also a twophototube sum-coincidence system, but it operates with linear pulse amplification and has a 133 Ba external source for quench determinations. Descriptions of the operating characteristics, the instruments' respective performance, and use within this laboratory for various radionuclidic calibrations are available elsewhere (16).…”
Section: Radionuclidic Standardization Of ␤ Emittersmentioning
confidence: 99%