Vintage & Estate. The gift of a Diamond Ring has, for centuries, been the consummate metaphor for love and enduring commitment. Though your options are endless, few jewelers are conscientious of quality standards. Every Margulis Diamond is of the finest cut, color, and clarity for the investment put forth. Call us today at 503.227.1153.
The decay of radioactive elements occurs at a fixed rate. The half-life of a radioisotope is the time required for one half of the amount of unstable material to degrade into a more stable material. For example, a source will have an intensity of 100% when new. At one half-life, its intensity will be cut to 50% of the original intensity.
59 Co is the only stable cobalt isotope and the only isotope to exist naturally on Earth. 22 radioisotopes have been characterized with the most stable being 60 Co with a half-life of 5.2714 years, 57 Co with a half-life of 271.8 days, 56 Co with a half-life of 77.27 days, and 58 Co with a half-life of 70.86 days.