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 3.0 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.
^( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
^# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
^ ab# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
Geologically exceptional samples are found associated with the Oklonatural nuclear fission reactor, in which the isotopic composition lies outside the reported range. The uncertainty in the atomic mass may exceed the stated value for such specimens.
Dysprosium-165
This section needs expansion with: Usage in medicine, ATC=V09. You can help by adding to it. (October 2019)
The radioactive isotope 165Dy, with a half life of 2.334 hours, has radiopharmaceutical uses.
^Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (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.
Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001
Isotopic compositions and standard atomic masses from:
de Laeter, John Robert; Böhlke, John Karl; De Bièvre, Paul; Hidaka, Hiroshi; Peiser, H. Steffen; Rosman, Kevin J. R.; Taylor, Philip D. P. (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683–800. doi:10.1351/pac200375060683.
Wieser, Michael E. (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry. 78 (11): 2051–2066. doi:10.1351/pac200678112051.
"News & Notices: Standard Atomic Weights Revised". International Union of Pure and Applied Chemistry. 19 October 2005.
Half-life, spin, and isomer data selected from the following sources.
Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001
isotopes, dysprosium, naturally, occurring, dysprosium, 66dy, composed, stable, isotopes, 156dy, 158dy, 160dy, 161dy, 162dy, 163dy, 164dy, with, 164dy, being, most, abundant, natural, abundance, twenty, nine, radioisotopes, have, been, characterized, with, mos. 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 3 0 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 Isotopes of dysprosium 66Dy Main isotopes Decayabun dance half life t1 2 mode pro duct154Dy syn 3 0 106 y a 150Gd156Dy 0 056 stable158Dy 0 095 stable160Dy 2 329 stable161Dy 18 889 stable162Dy 25 475 stable163Dy 24 896 stable164Dy 28 260 stable165Dy syn 2 334 h b 165HoStandard atomic weight Ar Dy 162 500 0 001162 50 0 01 abridged 1 2 viewtalkeditThe 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 List of isotopes EditNuclide n 1 Z N Isotopic mass Da n 2 n 3 Half life n 4 Decaymode n 5 Daughterisotope n 6 Spin andparity n 7 n 4 Natural abundance mole fraction Excitation energy Normal proportion Range of variation138Dy 66 72 137 96249 64 200 ms 0 139Dy 66 73 138 95954 54 600 200 ms 7 2 140Dy 66 74 139 95401 54 700 ms b 140Tb 0 140mDy 2166 1 5 keV 7 0 5 ms 8 141Dy 66 75 140 95135 32 0 9 2 s b 141Tb 9 2 b p rare 140Gd142Dy 66 76 141 94637 39 2 3 3 s b 99 94 142Tb 0 b p 06 141Gd143Dy 66 77 142 94383 21 5 6 10 s b 143Tb 1 2 b p rare 142Gd143mDy 310 7 6 keV 3 0 3 s 11 2 144Dy 66 78 143 93925 3 9 1 4 s b 144Tb 0 b p rare 143Gd145Dy 66 79 144 93743 5 9 5 10 s b 145Tb 1 2 b p rare 144Gd145mDy 118 2 2 keV 14 1 7 s b 145Tb 11 2 146Dy 66 80 145 932845 29 33 2 7 s b 146Tb 0 146mDy 2935 7 6 keV 150 20 ms IT 146Dy 10 147Dy 66 81 146 931092 21 40 10 s b 99 95 147Tb 1 2 b p 05 146Tb147m1Dy 750 5 4 keV 55 1 s b 65 147Tb 11 2 IT 35 147Dy147m2Dy 3407 2 8 keV 0 40 1 ms 27 2 148Dy 66 82 147 927150 11 3 3 2 min b 148Tb 0 149Dy 66 83 148 927305 9 4 20 14 min b 149Tb 7 2 149mDy 2661 1 4 keV 490 15 ms IT 99 3 149Dy 27 2 b 7 149Tb150Dy 66 84 149 925585 5 7 17 5 min b 64 150Tb 0 a 36 146Gd151Dy 66 85 150 926185 4 17 9 3 min b 94 4 151Tb 7 2 a 5 6 147Gd152Dy 66 86 151 924718 6 2 38 2 h EC 99 9 152Tb 0 a 1 148Gd153Dy 66 87 152 925765 5 6 4 1 h b 99 99 153Tb 7 2 a 00939 149Gd154Dy 66 88 153 924424 8 3 0 15 106 y a 150Gd 0 b b rare 154Gd155Dy 66 89 154 925754 13 9 9 2 h b 155Tb 3 2 155mDy 234 33 3 keV 6 1 ms 11 2 156Dy 66 90 155 924283 7 Observationally Stable n 8 0 5 6 3 10 4157Dy 66 91 156 925466 7 8 14 4 h b 157Tb 3 2 157m1Dy 161 99 3 keV 1 3 2 ms 9 2 157m2Dy 199 38 7 keV 21 6 16 ms IT 157Dy 11 2 158Dy 66 92 157 924409 4 Observationally Stable n 9 0 9 5 3 10 4159Dy 66 93 158 9257392 29 144 4 2 d EC 159Tb 3 2 159mDy 352 77 14 keV 122 3 ms 11 2 160Dy 66 94 159 9251975 27 Observationally Stable n 10 0 0 02329 18 161Dy 66 95 160 9269334 27 Observationally Stable n 11 5 2 0 18889 42 162Dy 66 96 161 9267984 27 Observationally Stable n 12 0 0 25475 36 163Dy 66 97 162 9287312 27 Stable n 13 n 14 3 5 2 0 24896 42 164Dy 66 98 163 9291748 27 Stable n 13 0 0 28260 54 165Dy 66 99 164 9317033 27 2 334 1 h b 165Ho 7 2 165mDy 108 160 3 keV 1 257 6 min IT 97 76 165Dy 1 2 b 2 24 165Ho166Dy 66 100 165 9328067 28 81 6 1 h b 166Ho 0 167Dy 66 101 166 93566 6 6 20 8 min b 167Ho 1 2 168Dy 66 102 167 93713 15 8 7 3 min b 168Ho 0 169Dy 66 103 168 94031 32 39 8 s b 169Ho 5 2 170Dy 66 104 169 94239 21 30 s b 170Ho 0 171Dy 66 105 170 94620 32 6 s b 171Ho 7 2 172Dy 66 106 171 94876 43 3 s b 172Ho 0 173Dy 66 107 172 95300 54 2 s b 173Ho 9 2 This table header amp footer view mDy Excited nuclear isomer Uncertainty 1s is given in concise form in parentheses after the corresponding last digits Atomic mass marked value and uncertainty derived not from purely experimental data but at least partly from trends from the Mass Surface TMS a b Values marked are not purely derived from experimental data but at least partly from trends of neighboring nuclides TNN Modes of decay EC Electron captureIT Isomeric transitionp Proton emission Bold symbol as daughter Daughter product is stable spin value Indicates spin with weak assignment arguments Believed to undergo a decay to 152Gd or b b decay to 156Gd with a half life over 1018 years Believed to undergo a decay to 154Gd or b b decay to 158Gd Believed to undergo a decay to 156Gd Believed to undergo a decay to 157Gd Believed to undergo a decay to 158Gd a b Theoretically capable of spontaneous fission Can undergo bound state b decay to 163Ho with a half life of 47 days when fully ionized Geologically exceptional samples are found associated with the Oklo natural nuclear fission reactor in which the isotopic composition lies outside the reported range The uncertainty in the atomic mass may exceed the stated value for such specimens Dysprosium 165 EditThis section needs expansion with Usage in medicine ATC V09 You can help by adding to it October 2019 The radioactive isotope 165Dy with a half life of 2 334 hours has radiopharmaceutical uses References Edit Standard Atomic Weights Dysprosium CIAAW 2001 Prohaska Thomas Irrgeher Johanna Benefield Jacqueline et al 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 M Jung et al 1992 10 12 First observation of bound state b decay Physical Review Letters 69 15 2164 2167 Bibcode 1992PhRvL 69 2164J doi 10 1103 PhysRevLett 69 2164 PMID 10046415 Isotope masses from Audi Georges Bersillon Olivier Blachot Jean Wapstra Aaldert Hendrik 2003 The NUBASE evaluation of nuclear and decay properties Nuclear Physics A 729 3 128 Bibcode 2003NuPhA 729 3A doi 10 1016 j nuclphysa 2003 11 001 Isotopic compositions and standard atomic masses from de Laeter John Robert Bohlke John Karl De Bievre Paul Hidaka Hiroshi Peiser H Steffen Rosman Kevin J R Taylor Philip D P 2003 Atomic weights of the elements Review 2000 IUPAC Technical Report Pure and Applied Chemistry 75 6 683 800 doi 10 1351 pac200375060683 Wieser Michael E 2006 Atomic weights of the elements 2005 IUPAC Technical Report Pure and Applied Chemistry 78 11 2051 2066 doi 10 1351 pac200678112051 News amp Notices Standard Atomic Weights Revised International Union of Pure and Applied Chemistry 19 October 2005 Half life spin and isomer data selected from the following sources Audi Georges Bersillon Olivier Blachot Jean Wapstra Aaldert Hendrik 2003 The NUBASE evaluation of nuclear and decay properties Nuclear Physics A 729 3 128 Bibcode 2003NuPhA 729 3A doi 10 1016 j nuclphysa 2003 11 001 National Nuclear Data Center NuDat 2 x database Brookhaven National Laboratory Holden Norman E 2004 11 Table of the Isotopes In Lide David R ed CRC Handbook of Chemistry and Physics 85th ed Boca Raton Florida CRC Press ISBN 978 0 8493 0485 9 Retrieved from https en wikipedia org w index php title Isotopes of dysprosium amp oldid 1069514434 Dysprosium 154, wikipedia, wiki, book, books, library,
