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The radioactive decay process of each type of radioisotope is unique and is measured with a time period called a half-life.Radioisotopes are an essential part of radiopharmaceuticals.
The occurrence of natural diamonds is remarkable and important to earth studies.
This article reviews current thinking of where, how, when, and why natural diamonds form.
Research into natural diamonds (figure 1) has emerged over the last two decades as one of the keys to understanding the deep earth.
Analytical advances, improved geologic knowledge, and the emergence of new diamond-producing regions (such as the Slave craton of Canada) have all contributed to this change.
Radioisotopes are widely used in medicine, industry and scientific research, and new applications for their use are constantly being developed.