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Neodymium isotopes are used in various scientific applications. 142 Nd has been used for the production of short-lived isotopes of thulium and ytterbium. 146 Nd has been suggested for the production of 147 Pm, which is a source of radioactive power. Several neodymium isotopes have been used for the production of other promethium isotopes.
In all, 35 radioisotopes of neodymium have been characterized up to now, with the most stable being naturally occurring isotopes 144 Nd (alpha decay, a half-life (t 1/2) of 2.29 × 10 15 years) and 150 Nd (double beta decay, t 1/2 of 9.3 × 10 18 years), and for practical purposes they can be considered to be stable as well.
These 35 radioactive naturally occurring nuclides comprise the radioactive primordial nuclides. The total number of primordial nuclides is then 251 (the stable nuclides) plus the 35 radioactive primordial nuclides, for a total of 286 primordial nuclides. This number is subject to change if new shorter-lived primordials are identified on Earth.
The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), [1] are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.
The Cabrera Services report noted the radioactivity at the Albany Bulb is consistent with other landfills that accept construction debris, which may contain naturally radioactive material, such as ...
The minerals detected included sodium carbonate compounds such as trona (sometimes referred to as “soda ash”) that the scientists said had never been observed in other extraterrestrial samples.
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
"The brines provide an environment in which elements and simple organics could have combined to form more complex prebiotic organics on the pathway to life," said geologist Tim McCoy, curator of ...