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Standardization of 63Ni by 4πβ Liquid Scintillation Spectrometry With 3H-Standard Efficiency Tracing.
| Content Provider | Europe PMC |
|---|---|
| Author | Zimmerman, B. E. Collé, R. |
| Copyright Year | 1997 |
| Abstract | The low energy (Eβmax = 66.945 keV ± 0.004 keV) β-emitter 63Ni has become increasingly important in the field of radionuclidic metrology. In addition to having a low β-endpoint energy, the relatively long half-life (101.1 a ± 1.4 a) makes it an appealing standard for such applications. This paper describes the recent preparation and calibration of a new solution Standard Reference Material of 63Ni, SRM 4226C, released by the National Institute of Standards and Technology. The massic activity CA for these standards was determined using 4πβ liquid scintillation (LS) spectrometry with 3H-standard efficiency tracing using the CIEMAT/NIST method, and is certified as 50.53 kBq ·g−1 ± 0.46 Bq · g−1 at the reference time of 1200 EST August 15, 1995. The uncertainty given is the expanded (coverage factor k = 2 and thus a 2 standard deviation estimate) uncertainty based on the evaluation of 28 different uncertainty components. These components were evaluated on the basis of an exhaustive number (976) of LS counting measurements investigating over 15 variables. Through the study of these variables it was found that LS cocktail water mass fraction and ion concentration play important roles in cocktail stability and consistency of counting results. The results of all of these experiments are discussed. |
| ISSN | 1044677X |
| Journal | Journal of Research of the National Institute of Standards and Technology |
| Volume Number | 102 |
| PubMed Central reference number | PMC4882146 |
| Issue Number | 4 |
| PubMed reference number | 27805155 |
| e-ISSN | 21657254 |
| DOI | 10.6028/jres.102.031 |
| Language | English |
| Publisher | [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology |
| Publisher Date | 1997-07-01 |
| Access Restriction | Open |
| Rights License | The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright. |
| Subject Keyword | beta-counting CIEMAT/NIST Method liquid scintillation nickel-63 radioactivity standards |
| Content Type | Text |
| Resource Type | Article |
| Subject | Engineering |
