Nuclides with atomic number of 66 but with different mass numbers
Isotopes of dysprosium (66Dy)
Main isotopes[1]
Decay
abundance
half-life (t1/2)
mode
product
154Dy
synth
1.40×106 y[2]
α
150Gd
156Dy
0.056%
stable
158Dy
0.095%
stable
160Dy
2.33%
stable
161Dy
18.9%
stable
162Dy
25.5%
stable
163Dy
24.9%
stable
164Dy
28.3%
stable
165Dy
synth
2.334 h
β−
165Ho
Standard atomic weight Ar°(Dy)
162.500±0.001[3]
162.50±0.01 (abridged)[4]
view
talk
edit
Naturally occurring dysprosium (66Dy) is composed of 7 stable isotopes, 156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy and 164Dy, with 164Dy being the most abundant (28.18% natural abundance). Twenty-nine radioisotopes have been characterized, with the most stable being 154Dy with a half-life of 1.4 million years, 159Dy with a half-life of 144.4 days, and 166Dy with a half-life of 81.6 hours. All of the remaining radioactive isotopes have half-lives that are less than 10 hours, and the majority of these have half-lives that are less than 30 seconds. This element also has 12 meta states, with the most stable being 165mDy (half-life 1.257 minutes), 147mDy (half-life 55.7 seconds) and 145mDy (half-life 13.6 seconds).
The primary decay mode before the most abundant stable isotope, 164Dy, is electron capture, and the primary mode after is beta decay. The primary decay products before 164Dy are terbium isotopes, and the primary products after are holmium isotopes. Dysprosium is the heaviest element to have isotopes that are predicted to be stable rather than observationally stable isotopes that are predicted to be radioactive.
^Kondev, 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.
^Chiera, Nadine Mariel; Dressler, Rugard; Sprung, Peter; Talip, Zeynep; Schumann, Dorothea (2022-05-28). "High precision half-life measurement of the extinct radio-lanthanide Dysprosium-154". Scientific Reports. 12 (1). Springer Science and Business Media LLC. doi:10.1038/s41598-022-12684-6. ISSN 2045-2322.
^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 29 Related for: Isotopes of dysprosium information
holmium isotopes. Dysprosium is the heaviest element to have isotopes that are predicted to be stable rather than observationally stable isotopes that are...
xenotime. Naturally occurring dysprosium is composed of seven isotopes, the most abundant of which is 164Dy. Dysprosium was first identified in 1886 by...
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 long lived isotopes, 146Sm, 147Sm, and 148Sm, primarily decay by alpha decay to isotopesof neodymium. Lighter unstable isotopesof samarium primarily...
159Tb are element Gd (gadolinium) isotopes, and the primary products after 159Tb are element Dy (dysprosium) isotopes. mTb – Excited nuclear isomer. ( ) –...
titanium, dysprosium, erbium, europium, molybdenum and ytterbium. All of these occur in nature as mixtures of various isotopes, some of which are excellent...
expected to fall within the range of the island of stability, potentially conferring additional stability on some isotopes, especially 306Ubb which is expected...
increases, the neutron cross section of most isotopes decreases. The boron isotope 10B is responsible for the majority of the neutron absorption. Boron-containing...
Should the synthesis of unbiunium isotopes in such a reaction be successful, the resulting nuclei would decay through isotopesof ununennium that could...
terbium and dysprosiumisotopes, and the primary products after are erbium isotopes. Natural holmium consists of one primordial isotope, holmium-165;...
to power some spacecraft. Plutonium isotopes are expensive and inconvenient to separate, so particular isotopes are usually manufactured in specialized...
is a chemical element; it has symbol Pm and atomic number 61. All of its isotopes are radioactive; it is extremely rare, with only about 500–600 grams...
list of nuclides shows observed nuclides that either are stable or, if radioactive, have half-lives longer than one hour. This represents isotopesof the...
nuclides heavier than dysprosium-164 are theoretically radioactive. For example, it is predicted theoretically that all isotopesof tungsten, including...
synthetic isotopes in their ground states. The least stable isomer is 190m3Ir with a half-life of only 2 μs. The isotope 191Ir was the first one of any element...
days) and 47Ca (half-life 4.54 days). Isotopes lighter than 42Ca usually undergo beta plus decay to isotopesof potassium, and those heavier than 44Ca...
because there are many reasonably long-lived isotopesof curium that can be used to make a target. The light isotopes can be made by fusing curium-243 with calcium-48...
found in nature. All known isotopesof bohrium are highly radioactive; the most stable known isotope is 270Bh with a half-life of approximately 2.4 minutes...
a second. The isotopesof titanium range in atomic weight from 39.002 u (39Ti) to 63.999 u (64Ti). The primary decay mode for isotopes lighter than 46Ti...
synthesis of ununennium, as isotopes with half-lives below one microsecond would decay before reaching the detector, and the heavier isotopes cannot be...
of 282113 were detected. The aim of this experiment had been to synthesise the isotopes 281113 and 282113 that would fill in the gap between isotopes...
all its isotopes have half-lives of 8.1 hours or less, decaying into other astatine isotopes, bismuth, polonium, or radon. Most of its isotopes are very...
has isotopes that are not radioactive, these are termed "stable" isotopes. All of the known stable isotopes occur naturally (see primordial isotope). The...
Curium isotopes are inevitably present in spent nuclear fuel (about 20 g/tonne). The isotopes 245Cm–248Cm have decay times of thousands of years and...
consists of seven stable isotopes and two long-lived radioactive isotopes. More than 40 unstable xenon isotopes undergo radioactive decay, and the isotope ratios...
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...
trace isotopes 237U and 239U exclusively undergo beta decay, with respective half-lives of 6.752 days and 23.45 minutes. In total, 28 isotopesof uranium...
half-life of 21.772 years, 225 Ac with a half-life of 10.0 days and 226 Ac with a half-life of 29.37 hours. All remaining radioactive isotopes have half-lives...
Global Information