| Autor: |
Ernest L. Garner, Edward J. Catanzaro, T. J. Murphy, William R. Shields |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry. (5) |
| ISSN: |
0022-4332 |
| Popis: |
An absolute value hsas been obtained for the isotopic abundance ratio of terrestrial rubidium, using solid-sample thermal ionization mass spectrometry. Samples of known isotopic composition, prepared from nearly isotopically pure separated rubidium isotopes, were used to calibrate the mass spectrometers. The resulting absolute (85)Rb/(87)Rb ratio is 2.59265 ± 0.00170 which yields atom percents of: (85)Rb = 72.1654 ± 0.0132 and (87)Rb = 27.8346 ± 0.0132. The atomic weight calculated from this isotopic composition is 85.46776 ± 0.00026. The indicated uncertainties are overall limits of error based on 95 percent confidence limits for the mean and allowances for the effects of known sources of possible systematic error. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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