natural radioactivity การใช้

• Ledermann said the plant's discharge was " 1 percent of natural radioactivity ."
• In 1904, " Nature " published a study on the natural radioactivity of different mineral waters.
• Boron occurs sparsely, probably because bombardment by the subatomic particles produced from natural radioactivity disrupts its nuclei.
• Gamma ray logging apparently takes advantage of potassium's natural radioactivity, while potassium-argon dating is useful for dating deposits.
• Curie began her research with her parents Marie Curie and Pierre Curie studying natural radioactivity found in radioactive isotopes.
• The annual doses people receive from emissions of technetium-99 are " tiny " compared to those from natural radioactivity, the company maintains.
• A measuring station for the permanent monitoring of the artificial and natural radioactivity in the atmosphere has existed on the Schauinsland since 1957.
• The scintillator is to be used in a neutrino detection project in Japan that requires material as free from natural radioactivity as possible.
• In 1911 he had used natural radioactivity, in the form of alpha particles, in the first man-made nuclear transmutation, converting nitrogen nuclei into oxygen.
• The gamma ray log, measuring the natural radioactivity, was introduced by Well Surveys Inc . in 1939, and the WSI neutron log came in 1941.
• Substances containing natural radioactivity are known as 40 K ), typically 17 milligrams in the body at a time and 0.4 milligrams / day intake.
• India and mountains like the Alps are among the areas with the highest level of natural radioactivity due to their composition of rocks and sand.
• On the other hand, radiogenic isotope analysis involves measuring the abundances of decay-products of natural radioactivity, and is used in most long-lived radiometric dating methods.
• This natural radioactivity became a basis for a mistaken claim of the discovery for element 87 ( the next alkali metal after caesium ) in 1925.
• Stable isotope geochemistry is largely concerned with isotopic variations arising from mass-dependent isotope fractionation, whereas radiogenic isotope geochemistry is concerned with the products of natural radioactivity.
• The buffalo teeth were age-dated using two techniques, uranium decay and electron spin resonance, which measures electric charges added to tooth enamel by natural radioactivity over time.
• The BED is only an indicative concept meant to show the existence of very low levels of natural radioactivity within a natural food and is not a formally adopted dose quantity.
• At East Driefontein, Onstott planned to gather more samples to test a hypothesis that some deep bacteria extract energy from elements released as byproducts of the natural radioactivity of the rocks.
• The trick, he said, is to fire the pieces of uranium together fast enough to prevent their natural radioactivity from triggering a premature explosion or " predetonation, " much smaller than desired.
• Yes, bananas are high in potassium, but this machine also detects mangoes and papayas and pineapples and the rest of the tropical fruit spectrum, few of which are known for their natural radioactivity.