isotopes of calcium造句

• DePaolo s recent research provides a framework for understanding the partitioning of stable isotopes during mineral growth, with a focus on isotopes of calcium [ 11 ].
• For example, some presolar grains ( supernova grains ) have very large excesses of calcium-44, a stable isotope of calcium which normally composes only 2 % of the calcium abundance.
• It appears, they said, that during a four-month bombardment from a big Russian cyclotron of a rare isotope, or form, of plutonium by atoms of a rare isotope of calcium, a single atom of the new element was created.
• The JINR team sought to use berkelium because calcium-48, the isotope of calcium used in the beam, has 20 protons and 28 neutrons, making a neutron proton ratio of 1.4; and it is the lightest stable or near-stable nucleus with such a large neutron excess.
• For instance, two [ [ isotopes of calcium | ] ] atoms can fuse to form [ [ isotopes of krypton | ] ] plus 4 electrons, liberating 77 keV per nucleon, but reactions leading to the iron / nickel region are more probable as they release more energy per baryon.