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Isotopes of holmium#Holmium-141

{{Short description|none}}

{{Infobox holmium isotopes}}

File:Holmium 166m oxide.png

Natural holmium (67Ho) contains one observationally stable isotope, 165Ho. The below table lists 39 isotopes spanning 140Ho through 178Ho as well as 40 nuclear isomers. Among the known synthetic radioactive 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

{{Anchor|Holmium-145m|Holmium-149m1|Holmium-149m2}}

{{Isotopes table

| symbol = Ho

| refs = NUBASE2020, AME2020 II

| notes = m, unc(), mass#, exen#, hl#, spin(), spin#, daughter-st, EC, IT

}}

|-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# ms
[>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|Observationally StableBelieved 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# s
[>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+#

|

{{Isotopes table/footer}}

References

{{Reflist}}

  • Isotope masses from:
  • {{NUBASE 2003}}
  • Isotopic compositions and standard atomic masses from:
  • {{CIAAW2003}}
  • {{CIAAW 2005}}
  • Half-life, spin, and isomer data selected from the following sources.
  • {{NUBASE 2003}}
  • {{NNDC}}
  • {{CRC85|chapter=11}}

{{Navbox element isotopes}}

Category:Holmium

Holmium