Currently, six nuclides (3He, 10Be, 14C, 21Ne, 26Al, and 36Cl) are routinely measured in minerals or whole rock samples to determine the exposure age of a wide range of landforms, many of which could not otherwise be dated directly.
Concentrations of all three nuclides in mineral separates from rock sample CN309 from the Lauca ignimbrite in the Western Cordillera agree well and correspond to minimum exposure ages of 30 50 ka.
Nineteen nuclides and three nuclear isomers are known for einsteinium with atomic weights ranging from 240 to 258.
The atomic weight A for the sample crystal can be calculated, as the relative atomic masses of the three nuclides are known with great accuracy.
Hydrogen, deuterium and tritium are three nuclides of hydrogen having zero, one and two neutrons respectively.
Four nuclides are used currently in SPECT imaging: thallium 201, technetium 99m, iodine 123, and indium 111.
For all three nuclides studied the authors concluded that the dose measured by a ring dosimeter with the detector on the palmar base of the forefinger of the nondominant hand gave an acceptable estimate of the maximum skin dose, provided a correction factor of about 6 was applied.
Barium occurs naturally on Earth as a mixture of seven primordial nuclides, barium-130, 132, and 134 through 138.
As its fathers, grandfathers, and so on each decay exclusively to one nuclide, this gives only one possible way for the starting nuclide in the neptunium series (neptunium-237) to decay – via eventual production of astatine-217.
