Isotopes of dysprosium

{{Short description|none}} {{Infobox dysprosium isotopes}} Naturally occurring dysprosium (₆₆Dy) is composed of 7 stable isotopes, ¹⁵⁶Dy, ¹⁵⁸Dy, ¹⁶⁰Dy, ¹⁶¹Dy, ¹⁶²Dy, ¹⁶³Dy and ¹⁶⁴Dy, with ¹⁶⁴Dy being the most abundant (28.26% 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 to isotopes of terbium, and after beta decay to those of holmium. Dysprosium is the heaviest element to have isotopes that are theoretically stable (163, 164), rather than only ones that are observationally stable and predicted to be radioactive. ¹⁶⁴Dy has a surprisingly large thermal neutron absorption and the product isotope ¹⁶⁵Dy has found medical use (see below).

== List of isotopes == {{Anchor}}

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{{Isotopes table | symbol = Dy | refs = NUBASE2020, AME2020 II, IsotopeFRIB, IsomerFRIB | notes = m, unc(), hl#, mass#, spin(), spin#, daughter-st, EC, IT, p, discoveryname }} |-id=Dysprosium-138 | ¹³⁸Dy<ref name="suzuki2026">{{cite journal |last1=Suzuki |first1=H |last2=Fukuda |first2=N |last3=Takeda |first3=H |last4=Shimizu |first4=Y |last5=Yoshimoto |first5=M |last6=Togano |first6=Y |last7=Sato |first7=H |last8=Kitamura |first8=N |last9=Momota |first9=S |last10=Kusaka |first10=K |last11=Yanagisawa |first11=Y |last12=Ohtake |first12=M |last13=Fukunishi |first13=N |last14=Michimasa |first14=S |title=Discovery of Proton-Rich Radioactive Isotopes in the Z = 63–70 Region Produced by the Projectile Fragmentation of a 345-MeV/Nucleon 238U Beam |journal=Progress of Theoretical and Experimental Physics |date=3 February 2026 |volume=2026 |issue=2 |doi=10.1093/ptep/ptaf190|doi-access=free }}</ref> | style="text-align:right" | 66 | style="text-align:right" | 72 | 137.96250(54)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/138.pdf 2026] | 200#&nbsp;ms<br>[>310&nbsp;ns] | | | 0+ | | |-id=Dysprosium-139 | rowspan=2|¹³⁹Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 73 | rowspan=2|138.95953(54)# | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/139.pdf 1999] | rowspan=2|600(200)&nbsp;ms | β⁺ (~89%) | ¹³⁹Tb | rowspan=2|(7/2+) | rowspan=2| | rowspan=2| |- | β⁺, p (~11%) | ¹³⁸Gd |-id=Dysprosium-140 | rowspan=2|¹⁴⁰Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 74 | rowspan=2|139.95402(43)# | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/140.pdf 2002] | rowspan=2|700#&nbsp;ms | β⁺? | ¹⁴⁰Tb | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β⁺, p? | ¹³⁹Gd |-id=Dysprosium-140m | style="text-indent:1em" | ^140mDy | colspan="3" style="text-indent:2em" | 2166.1(5)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/140Dy-1.pdf 2002] | 7.0(5)&nbsp;μs | IT | ¹⁴⁰Dy | 8− | | |-id=Dysprosium-141 | rowspan=2|¹⁴¹Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 75 | rowspan=2|140.95128(32)# | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/141.pdf 1984] | rowspan=2|0.90(14)&nbsp;s | β⁺ | ¹⁴¹Tb | rowspan=2|(9/2−) | rowspan=2| | rowspan=2| |- | β⁺, p? | ¹⁴⁰Gd |-id=Dysprosium-142 | rowspan=3|¹⁴²Dy | rowspan=3 style="text-align:right" | 66 | rowspan=3 style="text-align:right" | 76 | rowspan=3|141.94619(78)# | rowspan=3 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/142.pdf 1986] | rowspan=3|2.3(3)&nbsp;s | β⁺ (90%) | rowspan=2|¹⁴²Tb | rowspan=3|0+ | rowspan=3| | rowspan=3| |- | EC (10%) |- | β⁺, p (0.06%) | ¹⁴¹Gd |-id=Dysprosium-143 | rowspan=2|¹⁴³Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 77 | rowspan=2|142.943994(14) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/143.pdf 1983] | rowspan=2|5.6(10)&nbsp;s | β⁺ | ¹⁴³Tb | rowspan=2|(1/2+) | rowspan=2| | rowspan=2| |- | β⁺, p? | ¹⁴²Gd |-id=Dysprosium-143m1 | rowspan=2 style="text-indent:1em" | ^143m1Dy | rowspan=2 colspan="3" style="text-indent:2em" | 310.7(6)&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/143Dy-1.pdf 2003] | rowspan=2|3.0(3)&nbsp;s | β⁺ | ¹⁴³Tb | rowspan=2|(11/2−) | rowspan=2| | rowspan=2| |- | β⁺, p? | ¹⁴²Gd |-id=Dysprosium-143m2 | style="text-indent:1em" | ^143m2Dy | colspan="3" style="text-indent:2em" | 406.3(8)&nbsp;keV | style="text-align:center" | (2005)<ref group="n">Only published in a conference proceeding and not a refereed journal.</ref> | 1.2(3)&nbsp;μs | IT | ¹⁴³Dy | (7/2−) | | |-id=Dysprosium-144 | rowspan=2|¹⁴⁴Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 78 | rowspan=2|143.9392695(77) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/144.pdf 1986] | rowspan=2|9.1(4)&nbsp;s | β⁺ | ¹⁴⁴Tb | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β⁺, p? | ¹⁴³Gd |-id=Dysprosium-145 | rowspan=2|¹⁴⁵Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 79 | rowspan=2|144.9374740(70) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/145.pdf 1982] | rowspan=2|9.5(10)&nbsp;s | β⁺ | ¹⁴⁵Tb | rowspan=2|(1/2+) | rowspan=2| | rowspan=2| |- | β⁺, p? | ¹⁴⁴Gd |-id=Dysprosium-145m | rowspan=2 style="text-indent:1em" | ^145mDy | rowspan=2 colspan="3" style="text-indent:2em" | 118.2(2)&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/145Dy-1.pdf 1993] | rowspan=2|14.1(7)&nbsp;s | β⁺ | ¹⁴⁵Tb | rowspan=2|(11/2−) | rowspan=2| | rowspan=2| |- | β⁺, p (~50%) | ¹⁴⁴Gd |-id=Dysprosium-146 | ¹⁴⁶Dy | style="text-align:right" | 66 | style="text-align:right" | 80 | 145.9328445(72) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/146.pdf 1981] | 33.2(7)&nbsp;s | β⁺ | ¹⁴⁶Tb | 0+ | | |-id=Dysprosium-146m | style="text-indent:1em" | ^146mDy | colspan="3" style="text-indent:2em" | 2934.5(4)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/146Dy-1.pdf 1982] | 150(20)&nbsp;ms | IT | ¹⁴⁶Dy | 10+ | | |-id=Dysprosium-147 | rowspan=2|¹⁴⁷Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 81 | rowspan=2|146.9310827(95) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/147.pdf 1975] | rowspan=2|67(7)&nbsp;s | β⁺ (99.95%) | ¹⁴⁷Tb | rowspan=2|(1/2+) | rowspan=2| | rowspan=2| |- | β⁺, p (0.05%) | ¹⁴⁶Gd |-id=Dysprosium-147m1 | rowspan=2 style="text-indent:1em" | ^147m1Dy | rowspan=2 colspan="3" style="text-indent:2em" | 750.5(4)&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/147Dy-1.pdf 1975] | rowspan=2|55.2(5)&nbsp;s | β⁺ (68.9%) | ¹⁴⁷Tb | rowspan=2|(11/2−) | rowspan=2| | rowspan=2| |- | IT (31.1%) | ¹⁴⁷Dy |-id=Dysprosium-147m2 | style="text-indent:1em" | ^147m2Dy | colspan="3" style="text-indent:2em" | 3407.2(8)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/147Dy-2.pdf 1985] | 0.40(1)&nbsp;μs | IT | ¹⁴⁷Dy | (27/2−) | | |-id=Dysprosium-148 | ¹⁴⁸Dy | style="text-align:right" | 66 | style="text-align:right" | 82 | 147.9271499(94) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/148.pdf 1974] | 3.3(2)&nbsp;min | β⁺ | ¹⁴⁸Tb | 0+ | | |-id=Dysprosium-148m | style="text-indent:1em" | ^148mDy | colspan="3" style="text-indent:2em" | 2919.1(10)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/148Dy-1.pdf 1978] | 471(20)&nbsp;ns | IT | ¹⁴⁸Dy | 10+ | | |-id=Dysprosium-149 | ¹⁴⁹Dy | style="text-align:right" | 66 | style="text-align:right" | 83 | 148.9273275(99) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/149.pdf 1958] | 4.20(14)&nbsp;min | β⁺ | ¹⁴⁹Tb | 7/2− | | |-id=Dysprosium-149m | rowspan=2 style="text-indent:1em" | ^149mDy | rowspan=2 colspan="3" style="text-indent:2em" | 2661.1(4)&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/149Dy-1.pdf 1976] | rowspan=2|490(15)&nbsp;ms | IT (99.3%) | ¹⁴⁹Dy | rowspan=2|27/2− | rowspan=2| | rowspan=2| |- | β⁺ (0.7%) | ¹⁴⁹Tb |-id=Dysprosium-150 | rowspan=2|¹⁵⁰Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 84 | rowspan=2|149.9255931(46) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/150.pdf 1958] | rowspan=2|7.17(5)&nbsp;min | β⁺ (66.4%) | ¹⁵⁰Tb | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | α (33.6%) | ¹⁴⁶Gd |-id=Dysprosium-151 | rowspan=2|¹⁵¹Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 85 | rowspan=2|150.9261913(35) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/151.pdf 1958] | rowspan=2|17.9(3)&nbsp;min | β⁺ (94.4%) | ¹⁵¹Tb | rowspan=2|7/2− | rowspan=2| | rowspan=2| |- | α (5.6%) | ¹⁴⁷Gd |-id=Dysprosium-152 | rowspan=2|¹⁵²Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 86 | rowspan=2|151.9247253(49) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/152.pdf 1958] | rowspan=2|2.38(2)&nbsp;h | EC (99.90%) | ¹⁵²Tb | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | α (0.100%) | ¹⁴⁸Gd |-id=Dysprosium-153 | rowspan=2|¹⁵³Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 87 | rowspan=2|152.9257717(43) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/153.pdf 1958] | rowspan=2|6.4(1)&nbsp;h | β⁺ (99.99%) | ¹⁵³Tb | rowspan=2|7/2− | rowspan=2| | rowspan=2| |- | α (0.0094%) | ¹⁴⁹Gd |-id=Dysprosium-154 |¹⁵⁴Dy | style="text-align:right" | 66 |style="text-align:right" | 88 |153.9244289(80) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/154.pdf 1961] |1.40(8)×10⁶&nbsp;y<ref>{{cite journal | last1=Chiera | first1=Nadine Mariel | last2=Dressler | first2=Rugard | last3=Sprung | first3=Peter | last4=Talip | first4=Zeynep | last5=Schumann | first5=Dorothea | title=High precision half-life measurement of the extinct radio-lanthanide Dysprosium-154 | journal=Scientific Reports | publisher=Springer Science and Business Media LLC | volume=12 | issue=1 | date=2022-05-28 | page=8988 | issn=2045-2322 | doi=10.1038/s41598-022-12684-6| pmid=35643721 | pmc=9148308 | bibcode=2022NatSR..12.8988C | doi-access=free }}</ref> | α<ref group="n">Theorized to also undergo β⁺β⁺ decay to '''¹⁵⁴Gd'''</ref> | ¹⁵⁰Gd |0+ | | |-id=Dysprosium-155 | ¹⁵⁵Dy | style="text-align:right" | 66 | style="text-align:right" | 89 | 154.925758(10) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/155.pdf 1958] | 9.9(2)&nbsp;h | β⁺ | ¹⁵⁵Tb | 3/2− | | |-id=Dysprosium-155m | style="text-indent:1em" | ^155mDy | colspan="3" style="text-indent:2em" | 234.33(3)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/155Dy-1.pdf 1970] | 6(1)&nbsp;μs | IT | ¹⁵⁵Dy | 11/2− | | |-id=Dysprosium-156 | ¹⁵⁶Dy | style="text-align:right" | 66 | style="text-align:right" | 90 | 155.9242836(11) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/156.pdf 1948] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to '''''¹⁵²Gd''''' with a half-life over 10¹⁸&nbsp;years or β⁺β⁺ decay to '''¹⁵⁶Gd'''</ref> | 0+ | 5.6(3)×10⁻⁴ | |-id=Dysprosium-157 | ¹⁵⁷Dy | style="text-align:right" | 66 | style="text-align:right" | 91 | 156.9254696(55) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/157.pdf 1953] | 8.14(4)&nbsp;h | β⁺ | ¹⁵⁷Tb | 3/2− | | |-id=Dysprosium-157m1 | style="text-indent:1em" | ^157m1Dy | colspan="3" style="text-indent:2em" | 161.99(3)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/157Dy-2.pdf 1974] | 1.3(2)&nbsp;μs | IT | ¹⁵⁷Dy | 9/2+ | | |-id=Dysprosium-157m2 | style="text-indent:1em" | ^157m2Dy | colspan="3" style="text-indent:2em" | 199.38(7)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/157Dy-1.pdf 1970] | 21.6(16)&nbsp;ms | IT | ¹⁵⁷Dy | 11/2− | | |-id=Dysprosium-158 | ¹⁵⁸Dy | style="text-align:right" | 66 | style="text-align:right" | 92 | 157.9244148(25) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/158.pdf 1938] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to '''¹⁵⁴Gd''' or β⁺β⁺ decay to '''¹⁵⁸Gd'''</ref> | 0+ | 9.5(3)×10⁻⁴ | |-id=Dysprosium-159 | ¹⁵⁹Dy | style="text-align:right" | 66 | style="text-align:right" | 93 | 158.9257459(15) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/159.pdf 1951] | 144.4(2)&nbsp;d | EC | '''¹⁵⁹Tb''' | 3/2− | | |-id=Dysprosium-159m | style="text-indent:1em" | ^159mDy | colspan="3" style="text-indent:2em" | 352.77(14)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/159Dy-1.pdf 1965] | 122(3)&nbsp;μs | IT | ¹⁵⁹Dy | 11/2− | | |-id=Dysprosium-160 | ¹⁶⁰Dy | style="text-align:right" | 66 | style="text-align:right" | 94 | 159.92520358(75) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/160.pdf 1938] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to '''¹⁵⁶Gd'''</ref> | 0+ | 0.02329(18) | |-id=Dysprosium-161 | ¹⁶¹Dy<ref group="n">Fission product</ref> | style="text-align:right" | 66 | style="text-align:right" | 95 | 160.92693943(75) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/161.pdf 1934] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to '''¹⁵⁷Gd'''</ref> | 5/2+ | 0.18889(42) | |-id=Dysprosium-161m | style="text-indent:1em" | ^161mDy | colspan="3" style="text-indent:2em" | 485.56(16)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/161Dy-1.pdf 2012] | 0.76(17)&nbsp;μs | IT | '''¹⁶¹Dy''' | 11/2− | | |-id=Dysprosium-162 | ¹⁶²Dy | style="text-align:right" | 66 | style="text-align:right" | 96 | 161.92680451(75) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/162.pdf 1934] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to '''¹⁵⁸Gd'''</ref> | 0+ | 0.25475(36) | |-id=Dysprosium-162m | style="text-indent:1em" | ^162mDy | colspan="3" style="text-indent:2em" | 2188.1(3)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/162Dy-1.pdf 2011] | 8.3(3)&nbsp;μs | IT | '''¹⁶²Dy''' | 8+ | | |-id=Dysprosium-163 | ¹⁶³Dy | style="text-align:right" | 66 | style="text-align:right" | 97 | 162.92873722(74) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/163.pdf 1934] | colspan=3 align=center|'''Stable'''{{refn|group="n"|Can undergo bound-state β⁻ decay to ¹⁶³Ho⁶⁶⁺ with a half-life of 47 days when fully ionized<ref name="Dy163-Jung">{{cite journal |author=M. Jung |display-authors=etal |journal=Physical Review Letters |volume=69 |issue=15 |pages=2164–2167 |date=1992-10-12 |title=First observation of bound-state β⁻ decay |doi=10.1103/PhysRevLett.69.2164 |pmid=10046415|bibcode=1992PhRvL..69.2164J }}</ref>}} | 5/2− | 0.24896(42) | |-id=Dysprosium-164 | ¹⁶⁴Dy<ref group="n">Heaviest theoretically stable nuclide</ref> | style="text-align:right" | 66 | style="text-align:right" | 98 | 163.92918082(75) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/164.pdf 1934] | colspan=3 align=center|'''Stable''' | 0+ | 0.28260(54) | |-id=Dysprosium-165 | ¹⁶⁵Dy | style="text-align:right" | 66 | style="text-align:right" | 99 | 164.93170940(75) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/165.pdf 1935] | 2.332(4)&nbsp;h | β⁻ | '''¹⁶⁵Ho''' | 7/2+ | | |-id=Dysprosium-165m | rowspan=2 style="text-indent:1em" | ^165mDy | rowspan=2 colspan="3" style="text-indent:2em" | 108.1552(13)&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/165Dy-1.pdf 1960] | rowspan=2|1.257(6)&nbsp;min | IT (97.76%) | ¹⁶⁵Dy | rowspan=2|1/2− | rowspan=2| | rowspan=2| |- | β⁻ (2.24%) | '''¹⁶⁵Ho''' |-id=Dysprosium-166 | ¹⁶⁶Dy | style="text-align:right" | 66 | style="text-align:right" | 100 | 165.93281281(86) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/166.pdf 1949] | 81.6(1)&nbsp;h | β⁻ | ¹⁶⁶Ho | 0+ | | |-id=Dysprosium-167 | ¹⁶⁷Dy | style="text-align:right" | 66 | style="text-align:right" | 101 | 166.9356824(43) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/167.pdf 1960] | 6.20(8)&nbsp;min | β⁻ | ¹⁶⁷Ho | (1/2−) | | |-id=Dysprosium-168 | ¹⁶⁸Dy | style="text-align:right" | 66 | style="text-align:right" | 102 | 167.93713(15) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/168.pdf 1982] | 8.7(3)&nbsp;min | β⁻ | ¹⁶⁸Ho | 0+ | | |-id=Dysprosium-168m | style="text-indent:1em" | ^168mDy | colspan="3" style="text-indent:2em" | 1378.2(6)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/168Dy-1.pdf 2019] | 0.57(7)&nbsp;μs | IT | ¹⁶⁸Dy | (4−) | | |-id=Dysprosium-169 | ¹⁶⁹Dy | style="text-align:right" | 66 | style="text-align:right" | 103 | 168.94032(32) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/169.pdf 1990] | 39(8)&nbsp;s | β⁻ | ¹⁶⁹Ho | (5/2)− | | |-id=Dysprosium-169m | style="text-indent:1em" | ^169mDy | colspan="3" style="text-indent:2em" | 166.1(5)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/169Dy-1.pdf 2019] | 1.26(17)&nbsp;μs | IT | ¹⁶⁹Dy | (1/2−) | | |-id=Dysprosium-170 | ¹⁷⁰Dy | style="text-align:right" | 66 | style="text-align:right" | 104 | 169.94234(22)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/170.pdf 2010] | 54.9(80)&nbsp;s | β⁻ | ¹⁷⁰Ho | 0+ | | |-id=Dysprosium-170m | style="text-indent:1em" | ^170mDy | colspan="3" style="text-indent:2em" | 1643.8(3)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/170Dy-1.pdf 2016] | 0.99(4)&nbsp;μs | IT | ¹⁷⁰Dy | (6+) | | |-id=Dysprosium-171 | ¹⁷¹Dy | style="text-align:right" | 66 | style="text-align:right" | 105 | 170.94631(22)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/171.pdf 2012] | 4.07(40)&nbsp;s | β⁻ | ¹⁷¹Ho | 7/2−# | | |-id=Dysprosium-172 | ¹⁷²Dy | style="text-align:right" | 66 | style="text-align:right" | 106 | 171.94873(32)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/172.pdf 2012] | 3.4(2)&nbsp;s | β⁻ | ¹⁷²Ho | 0+ | | |-id=Dysprosium-172m | rowspan=2 style="text-indent:1em" | ^172mDy | rowspan=2 colspan="3" style="text-indent:2em" | 1278(1)&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/66/172Dy-1.pdf 2016] | rowspan=2|710(50)&nbsp;ms | IT (81%) | ¹⁷²Dy | rowspan=2|(8−) | rowspan=2| | rowspan=2| |- | β⁻ (19%) | ¹⁷²Ho |-id=Dysprosium-173 | rowspan=2|¹⁷³Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 107 | rowspan=2|172.95304(43)# | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/173.pdf 2012] | rowspan=2|1.43(20)&nbsp;s | β⁻ | ¹⁷³Ho | rowspan=2|9/2+# | rowspan=2| | rowspan=2| |- | β⁻, n? | ¹⁷²Ho |-id=Dysprosium-174 | rowspan=2|¹⁷⁴Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 108 | rowspan=2|173.95585(54)# | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/174.pdf 2012] | rowspan=2|1#&nbsp;s<br>[>300&nbsp;ns] | β⁻? | ¹⁷⁴Ho | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β⁻, n? | ¹⁷³Ho |-id=Dysprosium-175 | rowspan=2|¹⁷⁵Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 109 | rowspan=2|174.96057(54)# | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/175.pdf 2018] | rowspan=2|390#&nbsp;ms<br>[>550&nbsp;ns] | β⁻? | ¹⁷⁵Ho | rowspan=2|1/2-# | rowspan=2| | rowspan=2| |- | β⁻, n? | ¹⁷⁴Ho |-id=Dysprosium-176 | rowspan=2|¹⁷⁶Dy | rowspan=2 style="text-align:right" | 66 | rowspan=2 style="text-align:right" | 110 | rowspan=2|175.96392(54)# | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/66/176.pdf 2018] | rowspan=2|440#&nbsp;ms<br>[>550&nbsp;ns] | β⁻? | ¹⁷⁶Ho | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β⁻, n? | ¹⁷⁵Ho {{Isotopes table/footer}}

==Dysprosium-165== The radioactive isotope ¹⁶⁵Dy, with a half-life of 2.332 hours, has radiopharmaceutical uses in radiation synovectomy of the knee. It had been previously performed with colloidal-sized particles containing longer-lived isotopes such as ¹⁹⁸Au and ⁹⁰Y. The major problem with the usage of those isotopes was radiation leakage out of the knee. ¹⁶⁵Dy, with its shorter half-life and thus shorter period of potential radiation leakage, is more suitable for the procedure.<ref>{{Cite journal |last1=Hnatowich |first1=D. J. |last2=Kramer |first2=R. I. |last3=Sledge |first3=C. B. |last4=Noble |first4=J. |last5=Shortkroff |first5=S. |date=1978-03-01 |title=Dysprosium-165 ferric hydroxide macroaggregates for radiation synovectomy. [Rabbits] |url=https://www.osti.gov/biblio/5045140 |journal=J. Nucl. Med.; (United States) |language=English |volume=19|issue=3 |osti=5045140 }}</ref>

== See also == '''Daughter products other than dysprosium''' * Isotopes of holmium * Isotopes of terbium * Isotopes of gadolinium

== References == {{Reflist}}

{{Navbox element isotopes}}

Category:Isotopes of dysprosium Category:Dysprosium Dysprosium