자연계에 존재하는 홀뮴의 안정 동위 원소는 1종으로 165Ho이 100% 존재한다. 인공적으로 만들어진 홀뮴의 동위 원소는 140Ho부터 175Ho까지 합성되었는데, 이들 중 163Ho의 반감기가 4570년으로 가장 길다. 166m1Ho은 들떠 있지만 반감기는 1200년이나 된다. 핵자수 Z(p) N(n) 동위 원소 질량 (u) 반감기 붕괴방식ε 전자 포획IT 이성질핵 전이 붕괴 생성동위 원소 핵스핀 자연계에 존재하는동위 원소범위(몰 분율) 자연계에 존재하는최대 범위(몰 분율) 들뜬 에너지 140Ho 67 73 139.96854(54)# 6(3) ms 8+# 141Ho 67 74 140.96310(54)# 4.1(3) ms (7/2-) 141mHo 66(2) keV 6.4(8) µs (1/2+) 142Ho 67 75 141.95977(54)# 400(100) ms β+ 142Dy (6~9) p 141Dy 143Ho 67 76 142.95461(43)# 300# ms>200 ns β+ 143Dy 11/2-# 144Ho 67 77 143.95148(32)# 0.7(1) s β+ 144Dy β+, p 143Tb 145Ho 67 78 144.94720(32)# 2.4(1) s β+ 145Dy (11/2-) 145mHo 100(100)# keV 100# ms 5/2+# 146Ho 67 79 145.94464(21)# 3.6(3) s β+ 146Dy (10+) β+, p (드묾) 145Tb 147Ho 67 80 146.94006(3) 5.8(4) s β+ 147Dy (11/2-) β+, p (드묾) 146Tb 148Ho 67 81 147.93772(14) 2.2(11) s β+ 148Dy (1+) 148m1Ho 400(100)# keV 9.49(12) s β+ (99.92%) 148Dy (6)- β+, p (0.08%) 147Tb 148m2Ho 690(100)# keV 2.35(4) ms (10+) 149Ho 67 82 148.933775(20) 21.1(2) s β+ 149Dy (11/2-) 149m1Ho 48.80(20) keV 56(3) s β+ 149Dy (1/2+) 149m2Ho 7200(350) keV >=100 ns 150Ho 67 83 149.933496(15) 76.8(18) s β+ 150Dy 2- 150m1Ho -10(50) keV 23.3(3) s β+ 150Dy (9)+ 150m2Ho ~8000 keV 751 ns 151Ho 67 84 150.931688(13) 35.2(1) s β+ (78%) 151Dy 11/2(-) α (22%) 147Tb 151mHo 41.0(2) keV 47.2(10) s α (77%) 147Tb 1/2(+) β+ (22%) 151Dy 152Ho 67 85 151.931714(15) 161.8(3) s β+ (88%) 152Dy 2- α (12%) 148Tb 152m1Ho 160(1) keV 50.0(4) s 9+ 152m2Ho 3019.59(19) keV 8.4(3) µs 19- 153Ho 67 86 152.930199(6) 2.01(3) min β+ (99.94%) 153Dy 11/2- α (0.05%) 149Tb 153m1Ho 68.7(3) keV 9.3(5) min β+ (99.82%) 153Dy 1/2+ α (0.18%) 149Tb 153m2Ho 2772 keV 229(2) ns (31/2+) 154Ho 67 87 153.930602(9) 11.76(19) min β+ (99.98%) 154Dy 2- α (0.02%) 150Tb 154mHo 238(30) keV 3.10(14) min β+ (99.99%) 154Dy 8+ α (0.001%) 150Tb IT (드묾) 154Ho 155Ho 67 88 154.929103(19) 48(1) min β+ 155Dy 5/2+ 155mHo 141.97(11) keV 880(80) µs 11/2- 156Ho 67 89 155.92984(5) 56(1) min β+ 156Dy 4- 156m1Ho 100(50)# keV 7.8(3) min β+ 156Dy (9+) IT 156Ho 156m2Ho 52.4(5) keV 9.5(15) s 1- 157Ho 67 90 156.928256(26) 12.6(2) min β+ 157Dy 7/2- 158Ho 67 91 157.928941(29) 11.3(4) min β+ (93%) 158Dy 5+ α (7%) 154Tb 158m1Ho 67.200(10) keV 28(2) min IT (81%) 158Ho 2- β+ (19%) 158Dy 158m2Ho 180(70)# keV 21.3(23) min (9+) 159Ho 67 92 158.927712(4) 33.05(11) min β+ 159Dy 7/2- 159mHo 205.91(5) keV 8.30(8) s IT 159Ho 1/2+ 160Ho 67 93 159.928729(16) 25.6(3) min β+ 160Dy 5+ 160m1Ho 59.98(3) keV 5.02(5) h IT (65%) 160Ho 2- β+ (35%) 160Dy 160m2Ho 197(16) keV 3 s (9+) 161Ho 67 94 160.927855(3) 2.48(5) h ε 161Dy 7/2- 161mHo 211.16(3) keV 6.76(7) s IT 161Ho 1/2+ 162Ho 67 95 161.929096(4) 15.0(10) min β+ 162Dy 1+ 162mHo 106(7) keV 67.0(7) min IT (62%) 162Ho 6- β+ (38%) 162Dy 163Ho 67 96 162.9287339(27) 4570(25) a ε 163Dy 7/2- 163mHo 297.88(7) keV 1.09(3) s IT 163Ho 1/2+ 164Ho 67 97 163.9302335(30) 29(1) min ε (60%) 164Dy 1+ β- (40%) 164Er 164mHo 139.77(8) keV 38.0(10) min37.5(+15-5) min IT 164Ho 6- 165Ho 67 98 164.9303221(27) 안정 7/2- 1.0000 166Ho 67 99 165.9322842(27) 26.83(2) h β- 166Er 0- 166m1Ho 5.985(18) keV 1,200(180) a β- 166Er (7)- 166m2Ho 190.9052(20) keV 185(15) µs 3+ 167Ho 67 100 166.933133(6) 3.003(18) h β- 167Er 7/2- 167mHo 259.34(11) keV 6.0(10) µs 3/2+ 168Ho 67 101 167.93552(3) 2.99(7) min β- 168Er 3+ 168m1Ho 59(1) keV 132(4) s IT (99.5%) 168Ho (6+) β- (0.5%) 168Er 168m2Ho 143.4(2) keV >4 µs (1)- 168m3Ho 192.6(2) keV 108(11) ns 1+ 169Ho 67 102 168.936872(22) 4.72(10) min β- 169Er 7/2- 170Ho 67 103 169.93962(5) 2.76(5) min β- 170Er 6+# 170mHo 120(70) keV 43(2) s β- 170Er (1+) 171Ho 67 104 170.94147(64) 53(2) s β- 171Er 7/2-# 172Ho 67 105 171.94482(43)# 25(3) s β- 172Er 173Ho 67 106 172.94729(43)# 10# s β- 173Er 7/2-# 174Ho 67 107 173.95115(54)# 8# s 175Ho 67 108 174.95405(64)# 5# s 7/2-# 동위 원소 분류:원소별 동위 원소 목록