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Although rubidium is monoisotopic, rubidium in the Earth's crust is composed of two isotopes: the stable 85 Rb (72.2%) and the radioactive 87 Rb (27.8%). [23] Natural rubidium is radioactive, with specific activity of about 670 Bq /g, enough to significantly expose a photographic film in 110 days.
Other than 87 Rb, the longest-lived radioisotopes are 83 Rb with a half-life of 86.2 days, 84 Rb with a half-life of 33.1 days, and 86 Rb with a half-life of 18.642 days. All other radioisotopes have half-lives less than a day. 82 Rb is used in some cardiac positron emission tomography scans to assess myocardial perfusion. It has a half-life of ...
Rubidium is a chemical element with the symbol Rb and atomic number 37. Date: 2007: Source: Image:Rubidium.gif: Author: Albedo-ukr:
Rubidium-82 (82 Rb) is a radioactive isotope of rubidium. 82 Rb is widely used in myocardial perfusion imaging . This isotope undergoes rapid uptake by myocardiocytes , which makes it a valuable tool for identifying myocardial ischemia in Positron Emission Tomography (PET) imaging.
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This page uses the meta infobox {{Infobox isotopes (meta)}} for the element isotopes infobox.. This infobox contains the table of § Main isotopes, and the § Standard atomic weight.
At 200° the partial pressure of Rb 2 is only 0.4%, at 400 °C it constitutes 1.6% of the pressure, and at 677 °C the dimer has 7.4% of the vapour pressure (13.8% by mass). [4] The rubidium dimer has been formed on the surface of helium nanodroplets when two rubidium atoms combine to yield the dimer: Rb + Rb → Rb 2
Rb oscillator Schematic of a Rubidium Oscillator. A rubidium standard or rubidium atomic clock is a frequency standard in which a specified hyperfine transition of electrons in rubidium-87 atoms is used to control the output frequency. [1]