Nuclides with atomic number of 60 but with different mass numbers
Isotopes of neodymium (60Nd)
Main isotopes[1]
Decay
abundance
half-life (t1/2)
mode
product
142Nd
27.2%
stable
143Nd
12.2%
stable
144Nd
23.8%
2.29×1015 y
α
140Ce
145Nd
8.3%
stable
146Nd
17.2%
stable
148Nd
5.80%
stable
150Nd
5.60%
9.3×1018 y[1]
β−β−
150Sm
Standard atomic weight Ar°(Nd)
144.242±0.003[2]
144.24±0.01 (abridged)[3]
view
talk
edit
Naturally occurring neodymium (60Nd) is composed of 5 stable isotopes, 142Nd, 143Nd, 145Nd, 146Nd and 148Nd, with 142Nd being the most abundant (27.2% natural abundance), and 2 long-lived radioisotopes, 144Nd and 150Nd. In all, 33 radioisotopes of neodymium have been characterized up to now, with the most stable being naturally occurring isotopes 144Nd (alpha decay, a half-life (t1/2) of 2.29×1015 years) and 150Nd (double beta decay, t1/2 of 7×1018 years), and for practical purposes they can be considered to be stable as well. All of the remaining radioactive isotopes have half-lives that are less than 12 days, and the majority of these have half-lives that are less than 70 seconds; the most stable artificial isotope is 147Nd with a half-life of 10.98 days. This element also has 13 known meta states with the most stable being 139mNd (t1/2 5.5 hours), 135mNd (t1/2 5.5 minutes) and 133m1Nd (t1/2 ~70 seconds).
The primary decay modes before the most abundant stable isotope (also the only theoretically stable isotope), 142Nd, are electron capture and positron decay, and the primary mode after is beta decay. The primary decay products before 142Nd are praseodymium isotopes and the primary products after are promethium isotopes.
^ abKondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
^Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
and 25 Related for: Isotopes of neodymium information
Naturally occurring neodymium (60Nd) is composed of 5 stable isotopes, 142Nd, 143Nd, 145Nd, 146Nd and 148Nd, with 142Nd being the most abundant (27.2%...
Additionally, some observationally stable isotopesof samarium are predicted to decay to isotopesofneodymium. Neodymiumisotopes are used in various scientific...
heavier isotopes is beta decay. The primary decay products before 146Pm are isotopesofneodymium, and the primary products after are isotopesof samarium...
The long lived isotopes, 146Sm, 147Sm, and 148Sm, primarily decay by alpha decay to isotopesofneodymium. Lighter unstable isotopesof samarium primarily...
stabilities of neighbor element isotopes; it is also the least stable element of the first 84. The primary decay products are neodymium and samarium isotopes (promethium-146...
subtract the natural neodymium and gain access to the isotopic composition ofneodymium produced by the fission of 235 U . The two isotopes 143 Nd and 145 Nd...
capture to isotopes of cerium, while that of heavier isotopes is beta decay to isotopesofneodymium. In 1751, the Swedish mineralogist Axel Fredrik Cronstedt...
elements, they are usually termed stable isotopes. The 80 elements with one or more stable isotopes comprise a total of 251 nuclides that have not been known...
11 have 5 stable isotopes, 9 have 4 stable isotopes, 5 have 3 stable isotopes, 16 have 2 stable isotopes, and 26 have 1 stable isotope. Additionally, about...
The environmental isotopes are a subset ofisotopes, both stable and radioactive, which are the object ofisotope geochemistry. They are primarily used...
Isotope geochemistry is an aspect of geology based upon the study of natural variations in the relative abundances ofisotopesof various elements. Variations...
before 141Pr are element 58 (cerium) isotopes and the primary products after are element 60 (neodymium) isotopes. mPr – Excited nuclear isomer. ( ) –...
nuclides List of elements by stability ofisotopes Big Bang nucleosynthesis Samir Maji; et al. (2006). "Separation of samarium and neodymium: a prerequisite...
available from long-lived isotopes, short-lived isotopes that are no longer present in the rock can be used. At the beginning of the solar system, there...
Extinct isotopesof superheavy elements are isotopesof superheavy elements whose half-lives were too short to have lasted through the formation of the Solar...
was reduced, as measured by the increased proportion of radiogenic isotopes in neodymiumisotope ratios. There is controversy whether upwelling off the...
has isotopes that are not radioactive, these are termed "stable" isotopes. All of the known stable isotopes occur naturally (see primordial isotope). The...
expected to fall within the range of the island of stability, potentially conferring additional stability on some isotopes, especially 306Ubb which is expected...
Should the synthesis of unbiunium isotopes in such a reaction be successful, the resulting nuclei would decay through isotopesof ununennium that could...
to form zirconium (Z = 40) isotopes. Isotopes with mass numbers at or above 97 are also known to have minor decay paths of β− delayed neutron emission...
occurring isotopes. Several radioactive isotopes have been synthesized in the laboratory, either by fusing two atoms or by observing the decay of heavier...
will alpha decay, possibly reaching flerovium and livermorium isotopes, and heavier isotopes will decay by spontaneous fission. This study and a quantum...
half-lives exceeding the age of the universe for the heaviest isotopes like 335Ts when beta decay is not considered. Lighter isotopesof tennessine may be produced...