Holmium-166 on:
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Natural
200 ns, , , 11/2−# , , -id=Holmium-144 , rowspan=2, 144Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 77 , rowspan=2, 143.9521097(91) , rowspan=2, 0.7(1) s , β+ , 144Dy , rowspan=2, (5−) , rowspan=2, , - , β+, p (?%) , 143Tb , -id=Holmium-144m , style="text-indent:1em" , 144mHo , colspan="3" style="text-indent:2em" , 265.3(3) keV , 519(5) ns , IT , 144Ho , (8+) , , -id=Holmium-145 , 145Ho , style="text-align:right" , 67 , style="text-align:right" , 78 , 144.9472674(80) , 2.4(1) s , β+ , 145Dy , (11/2−) , , -id=Holmium-146 , rowspan=2, 146Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 79 , rowspan=2, 145.9449935(71) , rowspan=2, 3.32(22) s , β+ , 146Dy , rowspan=2, (6−) , rowspan=2, , - , β+, p (?%) , 145Tb , -id=Holmium-147 , 147Ho , style="text-align:right" , 67 , style="text-align:right" , 80 , 146.9401423(54) , 5.8(4) s , β+ , 147Dy , (11/2−) , , -id=Holmium-147m , style="text-indent:1em" , 147mHo , colspan="3" style="text-indent:2em" , 2687.1(4) keV , 315(30) ns , IT , 147Ho , (27/2−) , , -id=Holmium-148 , 148Ho , style="text-align:right" , 67 , style="text-align:right" , 81 , 147.937744(90) , 2.2(11) s , β+ , 148Dy , (1+) , , -id=Holmium-148m1 , rowspan=2 style="text-indent:1em" , 148m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 250(100)# keV , rowspan=2, 9.49(12) s , β+ (99.92%) , 148Dy , rowspan=2, (5−) , rowspan=2, , - , β+, p (0.08%) , 147Tb , -id=Holmium-148m2 , style="text-indent:1em" , 148m2Ho , colspan="3" style="text-indent:2em" , 940(100)# keV , 2.36(6) ms , IT , 148m1Ho , (10)+ , , -id=Holmium-149 , 149Ho , style="text-align:right" , 67 , style="text-align:right" , 82 , 148.933820(13) , 21.1(2) s , β+ , 149Dy , (11/2−) , , -id=Holmium-149m , style="text-indent:1em" , 149mHo , colspan="3" style="text-indent:2em" , 48.80(20) keV , 56(3) s , β+ , 149Dy , (1/2+) , , -id=Holmium-150 , 150Ho , style="text-align:right" , 67 , style="text-align:right" , 83 , 149.933498(15) , 76.8(18) s , β+ , 150Dy , (2)− , , -id=Holmium-150m1 , style="text-indent:1em" , 150m1HoOrder of ground state and isomer is uncertain. , colspan="3" style="text-indent:2em" , 0(50) keV , 23.3(3) s , β+ , 150Dy , (9)+ , , -id=Holmium-150m2 , style="text-indent:1em" , 150m2Ho , colspan="3" style="text-indent:2em" , 7900(50) keV , 787(36) ns , IT , 150Ho , (28−) , , -id=Holmium-151 , rowspan=2, 151Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 84 , rowspan=2, 150.9316982(89) , rowspan=2, 35.2(1) s , β+ (78%) , 151Dy , rowspan=2, 11/2− , rowspan=2, , - , α (22%) , 147Tb , -id=Holmium-151m , rowspan=2 style="text-indent:1em" , 151mHo , rowspan=2 colspan="3" style="text-indent:2em" , 41.0(2) keV , rowspan=2, 47.2(13) s , α (77%) , 147Tb , rowspan=2, 1/2+ , rowspan=2, , - , β+ (23%) , 151Dy , -id=Holmium-152 , rowspan=2, 152Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 85 , rowspan=2, 151.931718(13) , rowspan=2, 161.8(3) s , β+ (88%) , 152Dy , rowspan=2, 2− , rowspan=2, , - , α (12%) , 148Tb , -id=Holmium-152m1 , rowspan=2 style="text-indent:1em" , 152m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 160(3) keV , rowspan=2, 49.8(2) s , β+ (89.2%) , 152Dy , rowspan=2, 9+ , rowspan=2, , - , α (10.8%) , 148Tb , -id=Holmium-152m2 , style="text-indent:1em" , 152m2Ho , colspan="3" style="text-indent:2em" , 3019.59(19) keV , 8.4(3) μs , IT , 152Ho , 19− , , -id=Holmium-153 , rowspan=2, 153Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 86 , rowspan=2, 152.9302067(54) , rowspan=2, 2.01(3) min , β+ (99.95%) , 153Dy , rowspan=2, 11/2− , rowspan=2, , - , α (0.051%) , 149Tb , -id=Holmium-153m1 , rowspan=2 style="text-indent:1em" , 153m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 68.7(3) keV , rowspan=2, 9.3(5) min , β+ (99.82%) , 153Dy , rowspan=2, 1/2+ , rowspan=2, , - , α (0.18%) , 149Tb , -id=Holmium-153m2 , style="text-indent:1em" , 153m2Ho , colspan="3" style="text-indent:2em" , 2772.3(14) keV , 229(2) ns , IT , 153Ho , 31/2+ , , -id=Holmium-154 , rowspan=2, 154Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 87 , rowspan=2, 153.9306068(88) , rowspan=2, 11.76(19) min , β+ (99.98%) , 154Dy , rowspan=2, 2− , rowspan=2, , - , α (0.019%) , 150Tb , -id=Holmium-154m , rowspan=3 style="text-indent:1em" , 154mHo , rowspan=3 colspan="3" style="text-indent:2em" , 243(28) keV , rowspan=3, 3.10(14) min , β+ , 154Dy , rowspan=3, 8+ , rowspan=3, , - , α (<0.001%) , 150Tb , - , IT (rare) , 154Ho , -id=Holmium-155 , 155Ho , style="text-align:right" , 67 , style="text-align:right" , 88 , 154.929103(19) , 48(2) min , β+ , 155Dy , 5/2+ , , -id=Holmium-155m , style="text-indent:1em" , 155mHo , colspan="3" style="text-indent:2em" , 141.87(11) keV , 880(80) μs , IT , 155Ho , 11/2− , , -id=Holmium-156 , 156Ho , style="text-align:right" , 67 , style="text-align:right" , 89 , 155.929642(41) , 56(1) min , β+ , 156Dy , 4− , , -id=Holmium-156m1 , style="text-indent:1em" , 156m1Ho , colspan="3" style="text-indent:2em" , 52.37(30) keV , 9.5(15) s , IT , 156Ho , 1− , , -id=Holmium-156m2 , rowspan=2 style="text-indent:1em" , 156m2Ho , rowspan=2 colspan="3" style="text-indent:2em" , 230(50) keV , rowspan=2, 7.6(3) min , β+ (75%) , 156Dy , rowspan=2, 9+ , rowspan=2, , - , IT (25%) , 156Ho , -id=Holmium-157 , 157Ho , style="text-align:right" , 67 , style="text-align:right" , 90 , 156.928252(25) , 12.6(2) min , β+ , 157Dy , 7/2− , , -id=Holmium-158 , 158Ho , style="text-align:right" , 67 , style="text-align:right" , 91 , 157.928945(29) , 11.3(4) min , β+ , 158Dy , 5+ , , -id=Holmium-158m1 , rowspan=2 style="text-indent:1em" , 158m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 67.20(1) keV , rowspan=2, 28(2) min , IT (91%) , 158Ho , rowspan=2, 2− , rowspan=2, , - , β+ (9%) , 158Dy , -id=Holmium-158m2 , style="text-indent:1em" , 158m2Ho , colspan="3" style="text-indent:2em" , 91.595(12) keV , 140(25) ns , IT , 158Ho , (2−) , , -id=Holmium-158m3 , style="text-indent:1em" , 158m3Ho , colspan="3" style="text-indent:2em" , 180(70)# keV , 21.3(23) min , β+ , 158Dy , (9+) , , -id=Holmium-159 , 159Ho , style="text-align:right" , 67 , style="text-align:right" , 92 , 158.9277187(33) , 33.05(11) min , β+ , 159Dy , 7/2− , , -id=Holmium-159m , style="text-indent:1em" , 159mHo , colspan="3" style="text-indent:2em" , 205.91(5) keV , 8.30(8) s , IT , 159Ho , 1/2+ , , -id=Holmium-160 , 160Ho , style="text-align:right" , 67 , style="text-align:right" , 93 , 159.928736(16) , 25.6(3) min , β+ , 160Dy , 5+ , , -id=Holmium-160m1 , rowspan=2 style="text-indent:1em" , 160m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 59.98(3) keV , rowspan=2, 5.02(5) h , IT (73%) , 160Ho , rowspan=2, 2− , rowspan=2, , - , β+ (27%) , 160Dy , -id=Holmium-160m2 , style="text-indent:1em" , 160m2Ho , colspan="3" style="text-indent:2em" , 197(16) keV , ~3 s , IT , 160Ho , (9+) , , -id=Holmium-161 , 161Ho , style="text-align:right" , 67 , style="text-align:right" , 94 , 160.9278618(23) , 2.48(5) h , EC , 161Dy , 7/2− , , -id=Holmium-161m , style="text-indent:1em" , 161mHo , colspan="3" style="text-indent:2em" , 211.15(3) keV , 6.76(7) s , IT , 161Ho , 1/2+ , , -id=Holmium-162 , 162Ho , style="text-align:right" , 67 , style="text-align:right" , 95 , 161.9291025(33) , 15.0(10) min , β+ , 162Dy , 1+ , , -id=Holmium-162m , rowspan=2 style="text-indent:1em" , 162mHo , rowspan=2 colspan="3" style="text-indent:2em" , 105.87(6) keV , rowspan=2, 67.0(7) min , IT (62%) , 162Ho , rowspan=2, 6− , rowspan=2, , - , β+ (38%) , 162Dy , -id=Holmium-163 , 163Ho , style="text-align:right" , 67 , style="text-align:right" , 96 , 162.92874026(74) , 4570(25) y , EC , 163Dy , 7/2− , , -id=Holmium-163m1 , style="text-indent:1em" , 163m1Ho , colspan="3" style="text-indent:2em" , 297.88(7) keV , 1.09(3) s , IT , 163Ho , 1/2+ , , -id=Holmium-163m2 , style="text-indent:1em" , 163m2Ho , colspan="3" style="text-indent:2em" , 2109.4(4) keV , 800(150) ns , IT , 163Ho , (23/2+) , , -id=Holmium-164 , rowspan=2, 164Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 97 , rowspan=2, 163.9302405(15) , rowspan=2, 28.8(5) min , EC (61%) , 164Dy , rowspan=2, 1+ , rowspan=2, , - , β− (39%) , 164Er , -id=Holmium-164m , style="text-indent:1em" , 164mHo , colspan="3" style="text-indent:2em" , 139.78(7) keV , 36.6(3) min , IT , 164Ho , 6− , , -id=Holmium-165 , 165Ho , style="text-align:right" , 67 , style="text-align:right" , 98 , 164.93032912(84) , colspan=3 align=center,
300 ns, , , 4+# , , -id=Holmium-177 , 177Ho , style="text-align:right" , 67 , style="text-align:right" , 110 , 176.96105(54)# , 1# s
550 ns, β− , 177Er , 7/2−# , , -id=Holmium-178 , 178Ho , style="text-align:right" , 67 , style="text-align:right" , 111 , 177.96551(54)# , 750# ms
550 ns, , , 2+# ,
Natural holmium
Holmium is a chemical element; it has symbol Ho and atomic number 67. It is a rare-earth element and the eleventh member of the lanthanide series. It is a relatively soft, silvery, fairly corrosion-resistant and malleable metal. Like many other ...
(67Ho) contains one observationally stable
Stable nuclides are isotopes of a chemical element whose nucleons are in a configuration that does not permit them the surplus energy required to produce a radioactive emission. The nuclei of such isotopes are not radioactive and unlike radionuc ...
isotope, 165Ho. The below table lists 39 isotopes spanning 140Ho through 178Ho as well as 40 nuclear isomer
A nuclear isomer is a metastable state of an atomic nucleus, in which one or more nucleons (protons or neutrons) occupy excited state levels (higher energy levels). "Metastable" describes nuclei whose excited states have Half-life, half-lives of ...
s. Among the known synthetic radioactive
Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is conside ...
isotopes; the most stable one is 163Ho, with a half-life of 4,570 years. All other radioisotopes have half-lives not greater than 1.117 days in their ground states (although the metastable 166m1Ho has a half-life of about 1,200 years), and most have half-lives under 3 hours.
List of isotopes
, -id=Holmium-140 , 140Ho , style="text-align:right" , 67 , style="text-align:right" , 73 , 139.96853(54)# , 6(3) ms , p , 139Dy , 8+# , , -id=Holmium-141 , 141Ho , style="text-align:right" , 67 , style="text-align:right" , 74 , 140.96311(43)# , 4.1(1) ms , p , 140Dy , (7/2−) , , -id=Holmium-141m , style="text-indent:1em" , 141mHo , colspan="3" style="text-indent:2em" , 66(2) keV , 7.3(3) μs , p , 140Dy , (1/2+) , , -id=Holmium-142 , rowspan=3, 142Ho , rowspan=3 style="text-align:right" , 67 , rowspan=3 style="text-align:right" , 75 , rowspan=3, 141.96001(43)# , rowspan=3, 400(100) ms , β+ , 142Dy , rowspan=3, (7−, 8+) , rowspan=3, , - , β+, p (?%) , 141Tb , - , p (?%) , 141Dy , -id=Holmium-143 , 143Ho , style="text-align:right" , 67 , style="text-align:right" , 76 , 142.95486(32)# , 300# ms200 ns, , , 11/2−# , , -id=Holmium-144 , rowspan=2, 144Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 77 , rowspan=2, 143.9521097(91) , rowspan=2, 0.7(1) s , β+ , 144Dy , rowspan=2, (5−) , rowspan=2, , - , β+, p (?%) , 143Tb , -id=Holmium-144m , style="text-indent:1em" , 144mHo , colspan="3" style="text-indent:2em" , 265.3(3) keV , 519(5) ns , IT , 144Ho , (8+) , , -id=Holmium-145 , 145Ho , style="text-align:right" , 67 , style="text-align:right" , 78 , 144.9472674(80) , 2.4(1) s , β+ , 145Dy , (11/2−) , , -id=Holmium-146 , rowspan=2, 146Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 79 , rowspan=2, 145.9449935(71) , rowspan=2, 3.32(22) s , β+ , 146Dy , rowspan=2, (6−) , rowspan=2, , - , β+, p (?%) , 145Tb , -id=Holmium-147 , 147Ho , style="text-align:right" , 67 , style="text-align:right" , 80 , 146.9401423(54) , 5.8(4) s , β+ , 147Dy , (11/2−) , , -id=Holmium-147m , style="text-indent:1em" , 147mHo , colspan="3" style="text-indent:2em" , 2687.1(4) keV , 315(30) ns , IT , 147Ho , (27/2−) , , -id=Holmium-148 , 148Ho , style="text-align:right" , 67 , style="text-align:right" , 81 , 147.937744(90) , 2.2(11) s , β+ , 148Dy , (1+) , , -id=Holmium-148m1 , rowspan=2 style="text-indent:1em" , 148m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 250(100)# keV , rowspan=2, 9.49(12) s , β+ (99.92%) , 148Dy , rowspan=2, (5−) , rowspan=2, , - , β+, p (0.08%) , 147Tb , -id=Holmium-148m2 , style="text-indent:1em" , 148m2Ho , colspan="3" style="text-indent:2em" , 940(100)# keV , 2.36(6) ms , IT , 148m1Ho , (10)+ , , -id=Holmium-149 , 149Ho , style="text-align:right" , 67 , style="text-align:right" , 82 , 148.933820(13) , 21.1(2) s , β+ , 149Dy , (11/2−) , , -id=Holmium-149m , style="text-indent:1em" , 149mHo , colspan="3" style="text-indent:2em" , 48.80(20) keV , 56(3) s , β+ , 149Dy , (1/2+) , , -id=Holmium-150 , 150Ho , style="text-align:right" , 67 , style="text-align:right" , 83 , 149.933498(15) , 76.8(18) s , β+ , 150Dy , (2)− , , -id=Holmium-150m1 , style="text-indent:1em" , 150m1HoOrder of ground state and isomer is uncertain. , colspan="3" style="text-indent:2em" , 0(50) keV , 23.3(3) s , β+ , 150Dy , (9)+ , , -id=Holmium-150m2 , style="text-indent:1em" , 150m2Ho , colspan="3" style="text-indent:2em" , 7900(50) keV , 787(36) ns , IT , 150Ho , (28−) , , -id=Holmium-151 , rowspan=2, 151Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 84 , rowspan=2, 150.9316982(89) , rowspan=2, 35.2(1) s , β+ (78%) , 151Dy , rowspan=2, 11/2− , rowspan=2, , - , α (22%) , 147Tb , -id=Holmium-151m , rowspan=2 style="text-indent:1em" , 151mHo , rowspan=2 colspan="3" style="text-indent:2em" , 41.0(2) keV , rowspan=2, 47.2(13) s , α (77%) , 147Tb , rowspan=2, 1/2+ , rowspan=2, , - , β+ (23%) , 151Dy , -id=Holmium-152 , rowspan=2, 152Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 85 , rowspan=2, 151.931718(13) , rowspan=2, 161.8(3) s , β+ (88%) , 152Dy , rowspan=2, 2− , rowspan=2, , - , α (12%) , 148Tb , -id=Holmium-152m1 , rowspan=2 style="text-indent:1em" , 152m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 160(3) keV , rowspan=2, 49.8(2) s , β+ (89.2%) , 152Dy , rowspan=2, 9+ , rowspan=2, , - , α (10.8%) , 148Tb , -id=Holmium-152m2 , style="text-indent:1em" , 152m2Ho , colspan="3" style="text-indent:2em" , 3019.59(19) keV , 8.4(3) μs , IT , 152Ho , 19− , , -id=Holmium-153 , rowspan=2, 153Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 86 , rowspan=2, 152.9302067(54) , rowspan=2, 2.01(3) min , β+ (99.95%) , 153Dy , rowspan=2, 11/2− , rowspan=2, , - , α (0.051%) , 149Tb , -id=Holmium-153m1 , rowspan=2 style="text-indent:1em" , 153m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 68.7(3) keV , rowspan=2, 9.3(5) min , β+ (99.82%) , 153Dy , rowspan=2, 1/2+ , rowspan=2, , - , α (0.18%) , 149Tb , -id=Holmium-153m2 , style="text-indent:1em" , 153m2Ho , colspan="3" style="text-indent:2em" , 2772.3(14) keV , 229(2) ns , IT , 153Ho , 31/2+ , , -id=Holmium-154 , rowspan=2, 154Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 87 , rowspan=2, 153.9306068(88) , rowspan=2, 11.76(19) min , β+ (99.98%) , 154Dy , rowspan=2, 2− , rowspan=2, , - , α (0.019%) , 150Tb , -id=Holmium-154m , rowspan=3 style="text-indent:1em" , 154mHo , rowspan=3 colspan="3" style="text-indent:2em" , 243(28) keV , rowspan=3, 3.10(14) min , β+ , 154Dy , rowspan=3, 8+ , rowspan=3, , - , α (<0.001%) , 150Tb , - , IT (rare) , 154Ho , -id=Holmium-155 , 155Ho , style="text-align:right" , 67 , style="text-align:right" , 88 , 154.929103(19) , 48(2) min , β+ , 155Dy , 5/2+ , , -id=Holmium-155m , style="text-indent:1em" , 155mHo , colspan="3" style="text-indent:2em" , 141.87(11) keV , 880(80) μs , IT , 155Ho , 11/2− , , -id=Holmium-156 , 156Ho , style="text-align:right" , 67 , style="text-align:right" , 89 , 155.929642(41) , 56(1) min , β+ , 156Dy , 4− , , -id=Holmium-156m1 , style="text-indent:1em" , 156m1Ho , colspan="3" style="text-indent:2em" , 52.37(30) keV , 9.5(15) s , IT , 156Ho , 1− , , -id=Holmium-156m2 , rowspan=2 style="text-indent:1em" , 156m2Ho , rowspan=2 colspan="3" style="text-indent:2em" , 230(50) keV , rowspan=2, 7.6(3) min , β+ (75%) , 156Dy , rowspan=2, 9+ , rowspan=2, , - , IT (25%) , 156Ho , -id=Holmium-157 , 157Ho , style="text-align:right" , 67 , style="text-align:right" , 90 , 156.928252(25) , 12.6(2) min , β+ , 157Dy , 7/2− , , -id=Holmium-158 , 158Ho , style="text-align:right" , 67 , style="text-align:right" , 91 , 157.928945(29) , 11.3(4) min , β+ , 158Dy , 5+ , , -id=Holmium-158m1 , rowspan=2 style="text-indent:1em" , 158m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 67.20(1) keV , rowspan=2, 28(2) min , IT (91%) , 158Ho , rowspan=2, 2− , rowspan=2, , - , β+ (9%) , 158Dy , -id=Holmium-158m2 , style="text-indent:1em" , 158m2Ho , colspan="3" style="text-indent:2em" , 91.595(12) keV , 140(25) ns , IT , 158Ho , (2−) , , -id=Holmium-158m3 , style="text-indent:1em" , 158m3Ho , colspan="3" style="text-indent:2em" , 180(70)# keV , 21.3(23) min , β+ , 158Dy , (9+) , , -id=Holmium-159 , 159Ho , style="text-align:right" , 67 , style="text-align:right" , 92 , 158.9277187(33) , 33.05(11) min , β+ , 159Dy , 7/2− , , -id=Holmium-159m , style="text-indent:1em" , 159mHo , colspan="3" style="text-indent:2em" , 205.91(5) keV , 8.30(8) s , IT , 159Ho , 1/2+ , , -id=Holmium-160 , 160Ho , style="text-align:right" , 67 , style="text-align:right" , 93 , 159.928736(16) , 25.6(3) min , β+ , 160Dy , 5+ , , -id=Holmium-160m1 , rowspan=2 style="text-indent:1em" , 160m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 59.98(3) keV , rowspan=2, 5.02(5) h , IT (73%) , 160Ho , rowspan=2, 2− , rowspan=2, , - , β+ (27%) , 160Dy , -id=Holmium-160m2 , style="text-indent:1em" , 160m2Ho , colspan="3" style="text-indent:2em" , 197(16) keV , ~3 s , IT , 160Ho , (9+) , , -id=Holmium-161 , 161Ho , style="text-align:right" , 67 , style="text-align:right" , 94 , 160.9278618(23) , 2.48(5) h , EC , 161Dy , 7/2− , , -id=Holmium-161m , style="text-indent:1em" , 161mHo , colspan="3" style="text-indent:2em" , 211.15(3) keV , 6.76(7) s , IT , 161Ho , 1/2+ , , -id=Holmium-162 , 162Ho , style="text-align:right" , 67 , style="text-align:right" , 95 , 161.9291025(33) , 15.0(10) min , β+ , 162Dy , 1+ , , -id=Holmium-162m , rowspan=2 style="text-indent:1em" , 162mHo , rowspan=2 colspan="3" style="text-indent:2em" , 105.87(6) keV , rowspan=2, 67.0(7) min , IT (62%) , 162Ho , rowspan=2, 6− , rowspan=2, , - , β+ (38%) , 162Dy , -id=Holmium-163 , 163Ho , style="text-align:right" , 67 , style="text-align:right" , 96 , 162.92874026(74) , 4570(25) y , EC , 163Dy , 7/2− , , -id=Holmium-163m1 , style="text-indent:1em" , 163m1Ho , colspan="3" style="text-indent:2em" , 297.88(7) keV , 1.09(3) s , IT , 163Ho , 1/2+ , , -id=Holmium-163m2 , style="text-indent:1em" , 163m2Ho , colspan="3" style="text-indent:2em" , 2109.4(4) keV , 800(150) ns , IT , 163Ho , (23/2+) , , -id=Holmium-164 , rowspan=2, 164Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 97 , rowspan=2, 163.9302405(15) , rowspan=2, 28.8(5) min , EC (61%) , 164Dy , rowspan=2, 1+ , rowspan=2, , - , β− (39%) , 164Er , -id=Holmium-164m , style="text-indent:1em" , 164mHo , colspan="3" style="text-indent:2em" , 139.78(7) keV , 36.6(3) min , IT , 164Ho , 6− , , -id=Holmium-165 , 165Ho , style="text-align:right" , 67 , style="text-align:right" , 98 , 164.93032912(84) , colspan=3 align=center,
Observationally Stable
Stable nuclides are isotopes of a chemical element whose nucleons are in a configuration that does not permit them the surplus energy required to produce a radioactive emission. The nuclei of such isotopes are not radioactive and unlike radionuc ...
Believed to undergo α decay to 161Tb
, 7/2−
, 1.0000
, -id=Holmium-165m1
, style="text-indent:1em" , 165m1Ho
, colspan="3" style="text-indent:2em" , 361.675(11) keV
, 1.512(4) μs
, IT
, 165Ho
, 3/2+
,
, -id=Holmium-165m2
, style="text-indent:1em" , 165m2Ho
, colspan="3" style="text-indent:2em" , 715.33(2) keV
, <100 ns
, IT
, 165Ho
, 7/2+
,
, -id=Holmium-166
, 166Ho
, style="text-align:right" , 67
, style="text-align:right" , 99
, 165.93229121(84)
, 26.812(7) h
, β−
, 166Er
, 0−
,
, -id=Holmium-166m1
, style="text-indent:1em" , 166m1Ho
, colspan="3" style="text-indent:2em" , 5.969(12) keV
, 1132.6(39) y
, β−
, 166Er
, 7−
,
, -id=Holmium-166m2
, style="text-indent:1em" , 166m2Ho
, colspan="3" style="text-indent:2em" , 190.9021(20) keV
, 185(15) μs
, IT
, 166Ho
, 3+
,
, -id=Holmium-167
, 167Ho
, style="text-align:right" , 67
, style="text-align:right" , 100
, 166.9331403(56)
, 3.1(1) h
, β−
, 167Er
, 7/2−
,
, -id=Holmium-167m
, style="text-indent:1em" , 167mHo
, colspan="3" style="text-indent:2em" , 259.34(11) keV
, 6.0(10) μs
, IT
, 167Ho
, 3/2+
,
, -id=Holmium-168
, 168Ho
, style="text-align:right" , 67
, style="text-align:right" , 101
, 167.935524(32)
, 2.99(7) min
, β−
, 168Er
, 3+
,
, -id=Holmium-168m1
, style="text-indent:1em" , 168m1Ho
, colspan="3" style="text-indent:2em" , 59(1) keV
, 132(4) s
, IT
, 168Ho
, (6+)
,
, -id=Holmium-168m2
, style="text-indent:1em" , 168m2Ho
, colspan="3" style="text-indent:2em" , 143.43(17) keV
, >4 μs
, IT
, 168Ho
, (1)−
,
, -id=Holmium-168m3
, style="text-indent:1em" , 168m3Ho
, colspan="3" style="text-indent:2em" , 192.57(20) keV
, 108(11) ns
, IT
, 168Ho
, 1+
,
, -id=Holmium-169
, 169Ho
, style="text-align:right" , 67
, style="text-align:right" , 102
, 168.936880(22)
, 4.72(10) min
, β−
, 169Er
, 7/2−
,
, -id=Holmium-169m
, style="text-indent:1em" , 169mHo
, colspan="3" style="text-indent:2em" , 1386.2(4) keV
, 118(6) μs
, IT
, 169Ho
, (19/2+)
,
, -id=Holmium-170
, 170Ho
, style="text-align:right" , 67
, style="text-align:right" , 103
, 169.939627(54)
, 2.76(5) min
, β−
, 170Er
, (6+)
,
, -id=Holmium-170m
, style="text-indent:1em" , 170mHo
, colspan="3" style="text-indent:2em" , 100(80) keV
, 43(2) s
, β−
, 170Er
, (1+)
,
, -id=Holmium-171
, 171Ho
, style="text-align:right" , 67
, style="text-align:right" , 104
, 170.94147(64)
, 53(2) s
, β−
, 171Er
, 7/2−#
,
, -id=Holmium-172
, 172Ho
, style="text-align:right" , 67
, style="text-align:right" , 105
, 171.94473(21)#
, 25(3) s
, β−
, 172Er
, 0+#
,
, -id=Holmium-173
, 173Ho
, style="text-align:right" , 67
, style="text-align:right" , 106
, 172.94702(32)#
, 7.1(4) s
, β−
, 173Er
, 7/2−#
,
, -id=Holmium-173m
, style="text-indent:1em" , 173mHo
, colspan="3" style="text-indent:2em" , 405(1) keV
, 3.7(12) μs
, IT
, 173Ho
, 1/2+#
,
, -id=Holmium-174
, 174Ho
, style="text-align:right" , 67
, style="text-align:right" , 107
, 173.95076(32)#
, 3.7(4) s
, β−
, 174Er
, (8−)
,
, -id=Holmium-175
, 175Ho
, style="text-align:right" , 67
, style="text-align:right" , 108
, 174.95352(43)#
, 1.88(55) s
, β−
, 175Er
, 7/2−#
,
, -id=Holmium-176
, 176Ho
, style="text-align:right" , 67
, style="text-align:right" , 109
, 175.95771(54)#
, 1# s300 ns, , , 4+# , , -id=Holmium-177 , 177Ho , style="text-align:right" , 67 , style="text-align:right" , 110 , 176.96105(54)# , 1# s
550 ns, β− , 177Er , 7/2−# , , -id=Holmium-178 , 178Ho , style="text-align:right" , 67 , style="text-align:right" , 111 , 177.96551(54)# , 750# ms
550 ns, , , 2+# ,
See also
Daughter products other than holmium *Isotopes of erbium
Naturally occurring erbium (68Er) is composed of six stable isotopes, with 166Er being the most abundant (33.503% natural abundance). Thirty-nine radioisotopes have been characterized with between 74 and 112 neutrons, or 142 to 180 nucleons, with ...
* Isotopes of dysprosium
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 ...
* Isotopes of terbium
Naturally occurring terbium (65Tb) is composed of one stable isotope, 159Tb. Thirty-seven radioisotopes have been characterized, with the most stable being 158Tb with a half-life of 180 years, 157Tb with a half-life of 71 years, and 160Tb with a ...
References
* Isotope masses from: ** * Isotopic compositions and standard atomic masses from: ** ** * Half-life, spin, and isomer data selected from the following sources. ** ** ** {{Navbox element isotopes HolmiumHolmium
Holmium is a chemical element; it has symbol Ho and atomic number 67. It is a rare-earth element and the eleventh member of the lanthanide series. It is a relatively soft, silvery, fairly corrosion-resistant and malleable metal. Like many other ...