isotopes of holmium on:
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Natural
, -
, 140Ho
, style="text-align:right" , 67
, style="text-align:right" , 73
, 139.96854(54)#
, 6(3) ms
,
,
, 8+#
,
,
, -
, 141Ho
, style="text-align:right" , 67
, style="text-align:right" , 74
, 140.96310(54)#
, 4.1(3) ms
,
,
, (7/2−)
,
,
, -
, style="text-indent:1em" , 141mHo
, colspan="3" style="text-indent:2em" , 66(2) keV
, 6.4(8) µs
,
,
, (1/2+)
,
,
, -
, rowspan=2, 142Ho
, rowspan=2 style="text-align:right" , 67
, rowspan=2 style="text-align:right" , 75
, rowspan=2, 141.95977(54)#
, rowspan=2, 400(100) ms
, β+
, 142Dy
, rowspan=2, (6 to 9)
, rowspan=2,
, rowspan=2,
, -
, p
, 141Dy
, -
, 143Ho
, style="text-align:right" , 67
, style="text-align:right" , 76
, 142.95461(43)#
, 300# ms
200 ns, β+ , 143Dy , 11/2−# , , , - , rowspan=2, 144Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 77 , rowspan=2, 143.95148(32)# , rowspan=2, 0.7(1) s , β+ , 144Dy , rowspan=2, , rowspan=2, , rowspan=2, , - , β+, p , 143Tb , - , 145Ho , style="text-align:right" , 67 , style="text-align:right" , 78 , 144.94720(32)# , 2.4(1) s , β+ , 145Dy , (11/2−) , , , - , style="text-indent:1em" , 145mHo , colspan="3" style="text-indent:2em" , 100(100)# keV , 100# ms , , , 5/2+# , , , - , rowspan=2, 146Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 79 , rowspan=2, 145.94464(21)# , rowspan=2, 3.6(3) s , β+ , 146Dy , rowspan=2, (10+) , rowspan=2, , rowspan=2, , - , β+, p (rare) , 145Tb , - , rowspan=2, 147Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 80 , rowspan=2, 146.94006(3) , rowspan=2, 5.8(4) s , β+ , 147Dy , rowspan=2, (11/2−) , rowspan=2, , rowspan=2, , - , β+, p (rare) , 146Tb , - , 148Ho , style="text-align:right" , 67 , style="text-align:right" , 81 , 147.93772(14) , 2.2(11) s , β+ , 148Dy , (1+) , , , - , rowspan=2 style="text-indent:1em" , 148m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 400(100)# keV , rowspan=2, 9.49(12) s , β+ (99.92%) , 148Dy , rowspan=2, (6)− , rowspan=2, , rowspan=2, , - , β+, p (.08%) , 147Tb , - , style="text-indent:1em" , 148m2Ho , colspan="3" style="text-indent:2em" , 690(100)# keV , 2.35(4) ms , , , (10+) , , , - , 149Ho , style="text-align:right" , 67 , style="text-align:right" , 82 , 148.933775(20) , 21.1(2) s , β+ , 149Dy , (11/2−) , , , - , style="text-indent:1em" , 149m1Ho , colspan="3" style="text-indent:2em" , 48.80(20) keV , 56(3) s , β+ , 149Dy , (1/2+) , , , - , style="text-indent:1em" , 149m2Ho , colspan="3" style="text-indent:2em" , 7200(350) keV , >=100 ns , , , , , , - , 150Ho , style="text-align:right" , 67 , style="text-align:right" , 83 , 149.933496(15) , 76.8(18) s , β+ , 150Dy , 2− , , , - , style="text-indent:1em" , 150m1Ho , colspan="3" style="text-indent:2em" , −10(50) keV , 23.3(3) s , β+ , 150Dy , (9)+ , , , - , style="text-indent:1em" , 150m2Ho , colspan="3" style="text-indent:2em" , ~8000 keV , 751 ns , , , , , , - , rowspan=2, 151Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 84 , rowspan=2, 150.931688(13) , rowspan=2, 35.2(1) s , β+ (78%) , 151Dy , rowspan=2, 11/2(−) , rowspan=2, , rowspan=2, , - , α (22%) , 147Tb , - , rowspan=2 style="text-indent:1em" , 151mHo , rowspan=2 colspan="3" style="text-indent:2em" , 41.0(2) keV , rowspan=2, 47.2(10) s , α (77%) , 147Tb , rowspan=2, 1/2(+) , rowspan=2, , rowspan=2, , - , β+ (22%) , 151Dy , - , rowspan=2, 152Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 85 , rowspan=2, 151.931714(15) , rowspan=2, 161.8(3) s , β+ (88%) , 152Dy , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , α (12%) , 148Tb , - , style="text-indent:1em" , 152m1Ho , colspan="3" style="text-indent:2em" , 160(1) keV , 50.0(4) s , , , 9+ , , , - , style="text-indent:1em" , 152m2Ho , colspan="3" style="text-indent:2em" , 3019.59(19) keV , 8.4(3) µs , , , 19− , , , - , rowspan=2, 153Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 86 , rowspan=2, 152.930199(6) , rowspan=2, 2.01(3) min , β+ (99.94%) , 153Dy , rowspan=2, 11/2− , rowspan=2, , rowspan=2, , - , α (.05%) , 149Tb , - , 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, , rowspan=2, , - , α (.18%) , 149Tb , - , style="text-indent:1em" , 153m2Ho , colspan="3" style="text-indent:2em" , 2772 keV , 229(2) ns , , , (31/2+) , , , - , rowspan=2, 154Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 87 , rowspan=2, 153.930602(9) , rowspan=2, 11.76(19) min , β+ (99.98%) , 154Dy , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , α (.02%) , 150Tb , - , rowspan=3 style="text-indent:1em" , 154mHo , rowspan=3 colspan="3" style="text-indent:2em" , 238(30) keV , rowspan=3, 3.10(14) min , β+ (99.99%) , 154Dy , rowspan=3, 8+ , rowspan=3, , rowspan=3, , - , α (.001%) , 150Tb , - , IT (rare) , 154Ho , - , 155Ho , style="text-align:right" , 67 , style="text-align:right" , 88 , 154.929103(19) , 48(1) min , β+ , 155Dy , 5/2+ , , , - , style="text-indent:1em" , 155mHo , colspan="3" style="text-indent:2em" , 141.97(11) keV , 880(80) µs , , , 11/2− , , , - , 156Ho , style="text-align:right" , 67 , style="text-align:right" , 89 , 155.92984(5) , 56(1) min , β+ , 156Dy , 4− , , , - , rowspan=2 style="text-indent:1em" , 156m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 100(50)# keV , rowspan=2, 7.8(3) min , β+ , 156Dy , rowspan=2, (9+) , rowspan=2, , rowspan=2, , - , IT , 156Ho , - , style="text-indent:1em" , 156m2Ho , colspan="3" style="text-indent:2em" , 52.4(5) keV , 9.5(15) s , , , 1− , , , - , 157Ho , style="text-align:right" , 67 , style="text-align:right" , 90 , 156.928256(26) , 12.6(2) min , β+ , 157Dy , 7/2− , , , - , rowspan=2, 158Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 91 , rowspan=2, 157.928941(29) , rowspan=2, 11.3(4) min , β+ (93%) , 158Dy , rowspan=2, 5+ , rowspan=2, , rowspan=2, , - , α (7%) , 154Tb , - , rowspan=2 style="text-indent:1em" , 158m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 67.200(10) keV , rowspan=2, 28(2) min , IT (81%) , 158Ho , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , β+ (19%) , 158Dy , - , style="text-indent:1em" , 158m2Ho , colspan="3" style="text-indent:2em" , 180(70)# keV , 21.3(23) min , , , (9+) , , , - , 159Ho , style="text-align:right" , 67 , style="text-align:right" , 92 , 158.927712(4) , 33.05(11) min , β+ , 159Dy , 7/2− , , , - , style="text-indent:1em" , 159mHo , colspan="3" style="text-indent:2em" , 205.91(5) keV , 8.30(8) s , IT , 159Ho , 1/2+ , , , - , 160Ho , style="text-align:right" , 67 , style="text-align:right" , 93 , 159.928729(16) , 25.6(3) min , β+ , 160Dy , 5+ , , , - , 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 (65%) , 160Ho , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , β+ (35%) , 160Dy , - , style="text-indent:1em" , 160m2Ho , colspan="3" style="text-indent:2em" , 197(16) keV , 3 s , , , (9+) , , , - , 161Ho , style="text-align:right" , 67 , style="text-align:right" , 94 , 160.927855(3) , 2.48(5) h , EC , 161Dy , 7/2− , , , - , style="text-indent:1em" , 161mHo , colspan="3" style="text-indent:2em" , 211.16(3) keV , 6.76(7) s , IT , 161Ho , 1/2+ , , , - , 162Ho , style="text-align:right" , 67 , style="text-align:right" , 95 , 161.929096(4) , 15.0(10) min , β+ , 162Dy , 1+ , , , - , rowspan=2 style="text-indent:1em" , 162mHo , rowspan=2 colspan="3" style="text-indent:2em" , 106(7) keV , rowspan=2, 67.0(7) min , IT (62%) , 162Ho , rowspan=2, 6− , rowspan=2, , rowspan=2, , - , β+ (38%) , 162Dy , - , 163Ho , style="text-align:right" , 67 , style="text-align:right" , 96 , 162.9287339(27) , 4570(25) y , EC , 163Dy , 7/2− , , , - , style="text-indent:1em" , 163mHo , colspan="3" style="text-indent:2em" , 297.88(7) keV , 1.09(3) s , IT , 163Ho , 1/2+ , , , - , rowspan=2, 164Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 97 , rowspan=2, 163.9302335(30) , rowspan=2, 29(1) min , EC (60%) , 164Dy , rowspan=2, 1+ , rowspan=2, , rowspan=2, , - , β− (40%) , 164Er , - , style="text-indent:1em" , 164mHo , colspan="3" style="text-indent:2em" , 139.77(8) keV , 38.0(10) min
7.5(+15−5) min, IT , 164Ho , 6− , , , - , 165Ho , style="text-align:right" , 67 , style="text-align:right" , 98 , 164.9303221(27) , colspan=3 align=center,
holmium
Holmium is a chemical element with the 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 a lot of othe ...
(67Ho) contains one observationally stable
Stable nuclides are nuclides that are not radioactive and so (unlike radionuclides) do not spontaneously undergo radioactive decay. When such nuclides are referred to in relation to specific elements, they are usually termed stable isotopes.
Th ...
isotope, 165Ho. The below table lists 36 isotopes spanning 140Ho through 175Ho as well as 33 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, higher energy levels than in the ground state of the same nucleus. "Metastable" describes nuclei whose excited ...
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 consid ...
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
, -
, 140Ho
, style="text-align:right" , 67
, style="text-align:right" , 73
, 139.96854(54)#
, 6(3) ms
,
,
, 8+#
,
,
, -
, 141Ho
, style="text-align:right" , 67
, style="text-align:right" , 74
, 140.96310(54)#
, 4.1(3) ms
,
,
, (7/2−)
,
,
, -
, style="text-indent:1em" , 141mHo
, colspan="3" style="text-indent:2em" , 66(2) keV
, 6.4(8) µs
,
,
, (1/2+)
,
,
, -
, rowspan=2, 142Ho
, rowspan=2 style="text-align:right" , 67
, rowspan=2 style="text-align:right" , 75
, rowspan=2, 141.95977(54)#
, rowspan=2, 400(100) ms
, β+
, 142Dy
, rowspan=2, (6 to 9)
, rowspan=2,
, rowspan=2,
, -
, p
, 141Dy
, -
, 143Ho
, style="text-align:right" , 67
, style="text-align:right" , 76
, 142.95461(43)#
, 300# ms200 ns, β+ , 143Dy , 11/2−# , , , - , rowspan=2, 144Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 77 , rowspan=2, 143.95148(32)# , rowspan=2, 0.7(1) s , β+ , 144Dy , rowspan=2, , rowspan=2, , rowspan=2, , - , β+, p , 143Tb , - , 145Ho , style="text-align:right" , 67 , style="text-align:right" , 78 , 144.94720(32)# , 2.4(1) s , β+ , 145Dy , (11/2−) , , , - , style="text-indent:1em" , 145mHo , colspan="3" style="text-indent:2em" , 100(100)# keV , 100# ms , , , 5/2+# , , , - , rowspan=2, 146Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 79 , rowspan=2, 145.94464(21)# , rowspan=2, 3.6(3) s , β+ , 146Dy , rowspan=2, (10+) , rowspan=2, , rowspan=2, , - , β+, p (rare) , 145Tb , - , rowspan=2, 147Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 80 , rowspan=2, 146.94006(3) , rowspan=2, 5.8(4) s , β+ , 147Dy , rowspan=2, (11/2−) , rowspan=2, , rowspan=2, , - , β+, p (rare) , 146Tb , - , 148Ho , style="text-align:right" , 67 , style="text-align:right" , 81 , 147.93772(14) , 2.2(11) s , β+ , 148Dy , (1+) , , , - , rowspan=2 style="text-indent:1em" , 148m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 400(100)# keV , rowspan=2, 9.49(12) s , β+ (99.92%) , 148Dy , rowspan=2, (6)− , rowspan=2, , rowspan=2, , - , β+, p (.08%) , 147Tb , - , style="text-indent:1em" , 148m2Ho , colspan="3" style="text-indent:2em" , 690(100)# keV , 2.35(4) ms , , , (10+) , , , - , 149Ho , style="text-align:right" , 67 , style="text-align:right" , 82 , 148.933775(20) , 21.1(2) s , β+ , 149Dy , (11/2−) , , , - , style="text-indent:1em" , 149m1Ho , colspan="3" style="text-indent:2em" , 48.80(20) keV , 56(3) s , β+ , 149Dy , (1/2+) , , , - , style="text-indent:1em" , 149m2Ho , colspan="3" style="text-indent:2em" , 7200(350) keV , >=100 ns , , , , , , - , 150Ho , style="text-align:right" , 67 , style="text-align:right" , 83 , 149.933496(15) , 76.8(18) s , β+ , 150Dy , 2− , , , - , style="text-indent:1em" , 150m1Ho , colspan="3" style="text-indent:2em" , −10(50) keV , 23.3(3) s , β+ , 150Dy , (9)+ , , , - , style="text-indent:1em" , 150m2Ho , colspan="3" style="text-indent:2em" , ~8000 keV , 751 ns , , , , , , - , rowspan=2, 151Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 84 , rowspan=2, 150.931688(13) , rowspan=2, 35.2(1) s , β+ (78%) , 151Dy , rowspan=2, 11/2(−) , rowspan=2, , rowspan=2, , - , α (22%) , 147Tb , - , rowspan=2 style="text-indent:1em" , 151mHo , rowspan=2 colspan="3" style="text-indent:2em" , 41.0(2) keV , rowspan=2, 47.2(10) s , α (77%) , 147Tb , rowspan=2, 1/2(+) , rowspan=2, , rowspan=2, , - , β+ (22%) , 151Dy , - , rowspan=2, 152Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 85 , rowspan=2, 151.931714(15) , rowspan=2, 161.8(3) s , β+ (88%) , 152Dy , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , α (12%) , 148Tb , - , style="text-indent:1em" , 152m1Ho , colspan="3" style="text-indent:2em" , 160(1) keV , 50.0(4) s , , , 9+ , , , - , style="text-indent:1em" , 152m2Ho , colspan="3" style="text-indent:2em" , 3019.59(19) keV , 8.4(3) µs , , , 19− , , , - , rowspan=2, 153Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 86 , rowspan=2, 152.930199(6) , rowspan=2, 2.01(3) min , β+ (99.94%) , 153Dy , rowspan=2, 11/2− , rowspan=2, , rowspan=2, , - , α (.05%) , 149Tb , - , 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, , rowspan=2, , - , α (.18%) , 149Tb , - , style="text-indent:1em" , 153m2Ho , colspan="3" style="text-indent:2em" , 2772 keV , 229(2) ns , , , (31/2+) , , , - , rowspan=2, 154Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 87 , rowspan=2, 153.930602(9) , rowspan=2, 11.76(19) min , β+ (99.98%) , 154Dy , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , α (.02%) , 150Tb , - , rowspan=3 style="text-indent:1em" , 154mHo , rowspan=3 colspan="3" style="text-indent:2em" , 238(30) keV , rowspan=3, 3.10(14) min , β+ (99.99%) , 154Dy , rowspan=3, 8+ , rowspan=3, , rowspan=3, , - , α (.001%) , 150Tb , - , IT (rare) , 154Ho , - , 155Ho , style="text-align:right" , 67 , style="text-align:right" , 88 , 154.929103(19) , 48(1) min , β+ , 155Dy , 5/2+ , , , - , style="text-indent:1em" , 155mHo , colspan="3" style="text-indent:2em" , 141.97(11) keV , 880(80) µs , , , 11/2− , , , - , 156Ho , style="text-align:right" , 67 , style="text-align:right" , 89 , 155.92984(5) , 56(1) min , β+ , 156Dy , 4− , , , - , rowspan=2 style="text-indent:1em" , 156m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 100(50)# keV , rowspan=2, 7.8(3) min , β+ , 156Dy , rowspan=2, (9+) , rowspan=2, , rowspan=2, , - , IT , 156Ho , - , style="text-indent:1em" , 156m2Ho , colspan="3" style="text-indent:2em" , 52.4(5) keV , 9.5(15) s , , , 1− , , , - , 157Ho , style="text-align:right" , 67 , style="text-align:right" , 90 , 156.928256(26) , 12.6(2) min , β+ , 157Dy , 7/2− , , , - , rowspan=2, 158Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 91 , rowspan=2, 157.928941(29) , rowspan=2, 11.3(4) min , β+ (93%) , 158Dy , rowspan=2, 5+ , rowspan=2, , rowspan=2, , - , α (7%) , 154Tb , - , rowspan=2 style="text-indent:1em" , 158m1Ho , rowspan=2 colspan="3" style="text-indent:2em" , 67.200(10) keV , rowspan=2, 28(2) min , IT (81%) , 158Ho , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , β+ (19%) , 158Dy , - , style="text-indent:1em" , 158m2Ho , colspan="3" style="text-indent:2em" , 180(70)# keV , 21.3(23) min , , , (9+) , , , - , 159Ho , style="text-align:right" , 67 , style="text-align:right" , 92 , 158.927712(4) , 33.05(11) min , β+ , 159Dy , 7/2− , , , - , style="text-indent:1em" , 159mHo , colspan="3" style="text-indent:2em" , 205.91(5) keV , 8.30(8) s , IT , 159Ho , 1/2+ , , , - , 160Ho , style="text-align:right" , 67 , style="text-align:right" , 93 , 159.928729(16) , 25.6(3) min , β+ , 160Dy , 5+ , , , - , 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 (65%) , 160Ho , rowspan=2, 2− , rowspan=2, , rowspan=2, , - , β+ (35%) , 160Dy , - , style="text-indent:1em" , 160m2Ho , colspan="3" style="text-indent:2em" , 197(16) keV , 3 s , , , (9+) , , , - , 161Ho , style="text-align:right" , 67 , style="text-align:right" , 94 , 160.927855(3) , 2.48(5) h , EC , 161Dy , 7/2− , , , - , style="text-indent:1em" , 161mHo , colspan="3" style="text-indent:2em" , 211.16(3) keV , 6.76(7) s , IT , 161Ho , 1/2+ , , , - , 162Ho , style="text-align:right" , 67 , style="text-align:right" , 95 , 161.929096(4) , 15.0(10) min , β+ , 162Dy , 1+ , , , - , rowspan=2 style="text-indent:1em" , 162mHo , rowspan=2 colspan="3" style="text-indent:2em" , 106(7) keV , rowspan=2, 67.0(7) min , IT (62%) , 162Ho , rowspan=2, 6− , rowspan=2, , rowspan=2, , - , β+ (38%) , 162Dy , - , 163Ho , style="text-align:right" , 67 , style="text-align:right" , 96 , 162.9287339(27) , 4570(25) y , EC , 163Dy , 7/2− , , , - , style="text-indent:1em" , 163mHo , colspan="3" style="text-indent:2em" , 297.88(7) keV , 1.09(3) s , IT , 163Ho , 1/2+ , , , - , rowspan=2, 164Ho , rowspan=2 style="text-align:right" , 67 , rowspan=2 style="text-align:right" , 97 , rowspan=2, 163.9302335(30) , rowspan=2, 29(1) min , EC (60%) , 164Dy , rowspan=2, 1+ , rowspan=2, , rowspan=2, , - , β− (40%) , 164Er , - , style="text-indent:1em" , 164mHo , colspan="3" style="text-indent:2em" , 139.77(8) keV , 38.0(10) min
7.5(+15−5) min, IT , 164Ho , 6− , , , - , 165Ho , style="text-align:right" , 67 , style="text-align:right" , 98 , 164.9303221(27) , colspan=3 align=center,
Observationally Stable
Stable nuclides are nuclides that are not radioactive and so (unlike radionuclides) do not spontaneously undergo radioactive decay. When such nuclides are referred to in relation to specific elements, they are usually termed stable isotopes.
Th ...
Believed to undergo α decay to 161Tb
, 7/2−
, 1.0000
,
, -
, 166Ho
, style="text-align:right" , 67
, style="text-align:right" , 99
, 165.9322842(27)
, 26.83(2) h
, β−
, 166Er
, 0−
,
,
, -
, style="text-indent:1em" , 166m1Ho
, colspan="3" style="text-indent:2em" , 5.985(18) keV
, 1200(180) y
, β−
, 166Er
, (7)−
,
,
, -
, style="text-indent:1em" , 166m2Ho
, colspan="3" style="text-indent:2em" , 190.9052(20) keV
, 185(15) µs
,
,
, 3+
,
,
, -
, 167Ho
, style="text-align:right" , 67
, style="text-align:right" , 100
, 166.933133(6)
, 3.003(18) h
, β−
, 167Er
, 7/2−
,
,
, -
, style="text-indent:1em" , 167mHo
, colspan="3" style="text-indent:2em" , 259.34(11) keV
, 6.0(10) µs
,
,
, 3/2+
,
,
, -
, 168Ho
, style="text-align:right" , 67
, style="text-align:right" , 101
, 167.93552(3)
, 2.99(7) min
, β−
, 168Er
, 3+
,
,
, -
, rowspan=2 style="text-indent:1em" , 168m1Ho
, rowspan=2 colspan="3" style="text-indent:2em" , 59(1) keV
, rowspan=2, 132(4) s
, IT (99.5%)
, 168Ho
, rowspan=2, (6+)
, rowspan=2,
, rowspan=2,
, -
, β− (.5%)
, 168Er
, -
, style="text-indent:1em" , 168m2Ho
, colspan="3" style="text-indent:2em" , 143.4(2) keV
, >4 µs
,
,
, (1)−
,
,
, -
, style="text-indent:1em" , 168m3Ho
, colspan="3" style="text-indent:2em" , 192.6(2) keV
, 108(11) ns
,
,
, 1+
,
,
, -
, 169Ho
, style="text-align:right" , 67
, style="text-align:right" , 102
, 168.936872(22)
, 4.72(10) min
, β−
, 169Er
, 7/2−
,
,
, -
, 170Ho
, style="text-align:right" , 67
, style="text-align:right" , 103
, 169.93962(5)
, 2.76(5) min
, β−
, 170Er
, 6+#
,
,
, -
, style="text-indent:1em" , 170mHo
, colspan="3" style="text-indent:2em" , 120(70) keV
, 43(2) s
, β−
, 170Er
, (1+)
,
,
, -
, 171Ho
, style="text-align:right" , 67
, style="text-align:right" , 104
, 170.94147(64)
, 53(2) s
, β−
, 171Er
, 7/2−#
,
,
, -
, 172Ho
, style="text-align:right" , 67
, style="text-align:right" , 105
, 171.94482(43)#
, 25(3) s
, β−
, 172Er
,
,
,
, -
, 173Ho
, style="text-align:right" , 67
, style="text-align:right" , 106
, 172.94729(43)#
, 10# s
, β−
, 173Er
, 7/2−#
,
,
, -
, 174Ho
, style="text-align:right" , 67
, style="text-align:right" , 107
, 173.95115(54)#
, 8# s
,
,
,
,
,
, -
, 175Ho
, style="text-align:right" , 67
, style="text-align:right" , 108
, 174.95405(64)#
, 5# s
,
,
, 7/2−#
,
,
References
Holmium
Holmium is a chemical element with the 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 a lot of othe ...