Bismuth Bismuth is a chemical element with the symbol Bi and atomic number 83. It is a post-transition metal and one of the pnictogens, with chemical properties resembling its lighter group 15 siblings arsenic and antimony. Elemental bismuth occurs ...

(₈₃Bi) has 41 known isotopes, ranging from ¹⁸⁴Bi to ²²⁴Bi. Bismuth has no stable

isotope Isotopes are two or more types of atoms that have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), and that differ in nucleon numbers (mass numb ...

s, but does have one very long-lived isotope; thus, the standard atomic weight can be given as . Although

bismuth-209 Bismuth-209 (209Bi) is the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay (alpha decay). It has 83 protons and a magic number of 126 neutrons, and an atomic mass of 208.9803987 amu (atomic mass un ...

is now known to be unstable, it has classically been considered to be a stable isotope because it has a

half-life Half-life (symbol ) is the time required for a quantity (of substance) to reduce to half of its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay or how long stable at ...

of approximately 2.01×10¹⁹ years, which is more than a billion times the age of the universe. Besides ²⁰⁹Bi, the most stable bismuth

radioisotopes A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess nuclear energy, making it unstable. This excess energy can be used in one of three ways: emitted from the nucleus as gamma radiation; transferr ...

are ^210mBi with a half-life of 3.04 million years, ²⁰⁸Bi with a half-life of 368,000 years and ²⁰⁷Bi, with a half-life of 32.9 years, none of which occurs in nature. All other isotopes have half-lives under 1 year, most under a day. Of naturally occurring radioisotopes, the most stable is

radiogenic A radiogenic nuclide is a nuclide that is produced by a process of radioactive decay. It may itself be radioactive (a radionuclide) or stable (a stable nuclide). Radiogenic nuclides (more commonly referred to as radiogenic isotopes) form some ...

²¹⁰Bi with a half-life of 5.012 days. ^210mBi, like ^180mTa, ^242mAm and some holmium isomers, is unusual for being a

nuclear isomer A nuclear isomer is a metastable state of an atomic nucleus, in which one or more nucleons (protons or neutrons) occupy higher energy levels than in the ground state of the same nucleus. "Metastable" describes nuclei whose excited states have ...

with a half-life multiple orders of magnitude longer than that of the ground state. Commercially, the isotope bismuth-213 can be produced by bombarding

radium Radium is a chemical element with the symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rathe ...

with

bremsstrahlung ''Bremsstrahlung'' (), from "to brake" and "radiation"; i.e., "braking radiation" or "deceleration radiation", is electromagnetic radiation produced by the deceleration of a charged particle when deflected by another charged particle, typicall ...

photons from a

linear particle accelerator A linear particle accelerator (often shortened to linac) is a type of particle accelerator that accelerates charged subatomic particles or ions to a high speed by subjecting them to a series of oscillating electric potentials along a linear b ...

. In 1997, an antibody conjugate with ²¹³Bi (which has a 45-minute half-life, and decays with the emission of an alpha particle) was used to treat patients with leukemia. This isotope has also been tried in targeted alpha therapy (TAT) program to treat a variety of cancers. Bismuth-213 is also found in the decay chain of

uranium-233 Uranium-233 (233U or U-233) is a fissile isotope of uranium that is bred from thorium-232 as part of the thorium fuel cycle. Uranium-233 was investigated for use in nuclear weapons and as a reactor fuel. It has been used successfully in exp ...

, which is the fuel bred by thorium reactors.

List of isotopes

, - , ¹⁸⁴Bi , , style="text-align:right" , 83 , style="text-align:right" , 101 , 184.00112(14)# , 6.6(15) ms , , , 3+# , , , - , style="text-indent:1em" , ^184mBi , , colspan="3" style="text-indent:2em" , 150(100)# keV , 13(2) ms , , , 10−# , , , - , rowspan=2, ¹⁸⁵Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 102 , rowspan=2, 184.99763(6)# , rowspan=2, 2# ms , p , ¹⁸⁴Pb , rowspan=2, 9/2−# , rowspan=2, , rowspan=2, , - , α (rare) , ¹⁸¹Tl , - , rowspan=2 style="text-indent:1em" , ^185mBi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 70(50)# keV , rowspan=2, 49(7) μs , α , ¹⁸¹Tl , rowspan=2, 1/2+ , rowspan=2, , rowspan=2, , - , p , ¹⁸⁴Pb , - , rowspan=2, ¹⁸⁶Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 103 , rowspan=2, 185.99660(8) , rowspan=2, 14.8(7) ms , α , ¹⁸²Tl , rowspan=2, (3+) , rowspan=2, , rowspan=2, , - , β⁺ (rare) , ¹⁸⁶Pb , - , rowspan=2 style="text-indent:1em" , ^186mBi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 270(140)# keV , rowspan=2, 9.8(4) ms , α , ¹⁸²Tl , rowspan=2, (10−) , rowspan=2, , rowspan=2, , - , β⁺ , ¹⁸⁶Pb , - , rowspan=2, ¹⁸⁷Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 104 , rowspan=2, 186.993158(16) , rowspan=2, 32(3) ms , α (50%) , ¹⁸³Tl , rowspan=2, 9/2−# , rowspan=2, , rowspan=2, , - , β⁺ (50%) , ¹⁸⁷Pb , - , style="text-indent:1em" , ^187m1Bi , , colspan="3" style="text-indent:2em" , 101(20) keV , 320(70) μs , , , 1/2+# , , , - , style="text-indent:1em" , ^187m2Bi , , colspan="3" style="text-indent:2em" , 252(1) keV , 7(5) μs , , , (13/2+) , , , - , rowspan=2, ¹⁸⁸Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 105 , rowspan=2, 187.99227(5) , rowspan=2, 44(3) ms , α , ¹⁸⁴Tl , rowspan=2, 3+# , rowspan=2, , rowspan=2, , - , β⁺ (rare) , ¹⁸⁸Pb , - , rowspan=2 style="text-indent:1em" , ^188mBi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 210(140)# keV , rowspan=2, 220(40) ms , α , ¹⁸⁴Tl , rowspan=2, (10−) , rowspan=2, , rowspan=2, , - , β⁺ (rare) , ¹⁸⁸Pb , - , rowspan=2, ¹⁸⁹Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 106 , rowspan=2, 188.98920(6) , rowspan=2, 674(11) ms , α (51%) , ¹⁸⁵Tl , rowspan=2, (9/2−) , rowspan=2, , rowspan=2, , - , β⁺ (49%) , ¹⁸⁹Pb , - , style="text-indent:1em" , ^189m1Bi , , colspan="3" style="text-indent:2em" , 181(6) keV , 5.0(1) ms , , , (1/2+) , , , - , style="text-indent:1em" , ^189m2Bi , , colspan="3" style="text-indent:2em" , 357(1) keV , 880(50) ns , , , (13/2+) , , , - , rowspan=2, ¹⁹⁰Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 107 , rowspan=2, 189.9883(2) , rowspan=2, 6.3(1) s , α (77%) , ¹⁸⁶Tl , rowspan=2, (3+) , rowspan=2, , rowspan=2, , - , β⁺ (30%) , ¹⁹⁰Pb , - , rowspan=2 style="text-indent:1em" , ^190m1Bi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 420(180) keV , rowspan=2, 6.2(1) s , α (70%) , ¹⁸⁶Tl , rowspan=2, (10−) , rowspan=2, , rowspan=2, , - , β⁺ (23%) , ¹⁹⁰Pb , - , style="text-indent:1em" , ^190m2Bi , , colspan="3" style="text-indent:2em" , 690(180) keV , >500(100) ns , , , 7+# , , , - , rowspan=2, ¹⁹¹Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 108 , rowspan=2, 190.985786(8) , rowspan=2, 12.3(3) s , α (60%) , ¹⁸⁷Tl , rowspan=2, (9/2−) , rowspan=2, , rowspan=2, , - , β⁺ (40%) , ¹⁹¹Pb , - , rowspan=2 style="text-indent:1em" , ^191mBi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 240(4) keV , rowspan=2, 124(5) ms , α (75%) , ¹⁸⁷Tl , rowspan=2, (1/2+) , rowspan=2, , rowspan=2, , - , β⁺ (25%) , ¹⁹¹Pb , - , rowspan=2, ¹⁹²Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 109 , rowspan=2, 191.98546(4) , rowspan=2, 34.6(9) s , β⁺ (82%) , ¹⁹²Pb , rowspan=2, (3+) , rowspan=2, , rowspan=2, , - , α (18%) , ¹⁸⁸Tl , - , rowspan=2 style="text-indent:1em" , ^192mBi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 150(30) keV , rowspan=2, 39.6(4) s , β⁺ (90.8%) , ¹⁹²Pb , rowspan=2, (10−) , rowspan=2, , rowspan=2, , - , α (9.2%) , ¹⁸⁸Tl , - , rowspan=2, ¹⁹³Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 110 , rowspan=2, 192.98296(1) , rowspan=2, 67(3) s , β⁺ (95%) , ¹⁹³Pb , rowspan=2, (9/2−) , rowspan=2, , rowspan=2, , - , α (5%) , ¹⁸⁹Tl , - , rowspan=2 style="text-indent:1em" , ^193mBi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 308(7) keV , rowspan=2, 3.2(6) s , α (90%) , ¹⁸⁹Tl , rowspan=2, (1/2+) , rowspan=2, , rowspan=2, , - , β⁺ (10%) , ¹⁹³Pb , - , rowspan=2, ¹⁹⁴Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 111 , rowspan=2, 193.98283(5) , rowspan=2, 95(3) s , β⁺ (99.54%) , ¹⁹⁴Pb , rowspan=2, (3+) , rowspan=2, , rowspan=2, , - , α (.46%) , ¹⁹⁰Tl , - , rowspan=2 style="text-indent:1em" , ^194m1Bi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 110(70) keV , rowspan=2, 125(2) s , β⁺ , ¹⁹⁴Pb , rowspan=2, (6+, 7+) , rowspan=2, , rowspan=2, , - , α (rare) , ¹⁹⁰Tl , - , style="text-indent:1em" , ^194m2Bi , , colspan="3" style="text-indent:2em" , 230(90)# keV , 115(4) s , , , (10−) , , , - , rowspan=2, ¹⁹⁵Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 112 , rowspan=2, 194.980651(6) , rowspan=2, 183(4) s , β⁺ (99.97%) , ¹⁹⁵Pb , rowspan=2, (9/2−) , rowspan=2, , rowspan=2, , - , α (.03%) , ¹⁹¹Tl , - , rowspan=2 style="text-indent:1em" , ^195m1Bi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 399(6) keV , rowspan=2, 87(1) s , β⁺ (67%) , ¹⁹⁵Pb , rowspan=2, (1/2+) , rowspan=2, , rowspan=2, , - , α (33%) , ¹⁹¹Tl , - , style="text-indent:1em" , ^195m2Bi , , colspan="3" style="text-indent:2em" , 2311.4+X keV , 750(50) ns , , , (29/2−) , , , - , rowspan=2, ¹⁹⁶Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 113 , rowspan=2, 195.980667(26) , rowspan=2, 5.1(2) min , β⁺ (99.99%) , ¹⁹⁶Pb , rowspan=2, (3+) , rowspan=2, , rowspan=2, , - , α (.00115%) , ¹⁹²Tl , - , rowspan=2 style="text-indent:1em" , ^196m1Bi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 166.6(30) keV , rowspan=2, 0.6(5) s , IT , ¹⁹⁶Bi , rowspan=2, (7+) , rowspan=2, , rowspan=2, , - , β⁺ , ¹⁹⁶Pb , - , style="text-indent:1em" , ^196m2Bi , , colspan="3" style="text-indent:2em" , 270(3) keV , 4.00(5) min , , , (10−) , , , - , rowspan=2, ¹⁹⁷Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 114 , rowspan=2, 196.978864(9) , rowspan=2, 9.33(50) min , β⁺ (99.99%) , ¹⁹⁷Pb , rowspan=2, (9/2−) , rowspan=2, , rowspan=2, , - , α (10⁻⁴%) , ¹⁹³Tl , - , rowspan=3 style="text-indent:1em" , ^197m1Bi , rowspan=3, , rowspan=3 colspan="3" style="text-indent:2em" , 690(110) keV , rowspan=3, 5.04(16) min , α (55%) , ¹⁹³Tl , rowspan=3, (1/2+) , rowspan=3, , rowspan=3, , - , β⁺ (45%) , ¹⁹⁷Pb , - , IT (.3%) , ¹⁹⁷Bi , - , style="text-indent:1em" , ^197m2Bi , , colspan="3" style="text-indent:2em" , 2129.3(4) keV , 204(18) ns , , , (23/2−) , , , - , style="text-indent:1em" , ^197m3Bi , , colspan="3" style="text-indent:2em" , 2360.4(5)+X keV , 263(13) ns , , , (29/2−) , , , - , style="text-indent:1em" , ^197m4Bi , , colspan="3" style="text-indent:2em" , 2383.1(7)+X keV , 253(39) ns , , , (29/2−) , , , - , style="text-indent:1em" , ^197m5Bi , , colspan="3" style="text-indent:2em" , 2929.5(5) keV , 209(30) ns , , , (31/2−) , , , - , ¹⁹⁸Bi , , style="text-align:right" , 83 , style="text-align:right" , 115 , 197.97921(3) , 10.3(3) min , β⁺ , ¹⁹⁸Pb , (2+, 3+) , , , - , style="text-indent:1em" , ^198m1Bi , , colspan="3" style="text-indent:2em" , 280(40) keV , 11.6(3) min , β⁺ , ¹⁹⁸Pb , (7+) , , , - , style="text-indent:1em" , ^198m2Bi , , colspan="3" style="text-indent:2em" , 530(40) keV , 7.7(5) s , , , 10− , , , - , ¹⁹⁹Bi , , style="text-align:right" , 83 , style="text-align:right" , 116 , 198.977672(13) , 27(1) min , β⁺ , ¹⁹⁹Pb , 9/2− , , , - , rowspan=3 style="text-indent:1em" , ^199m1Bi , rowspan=3, , rowspan=3 colspan="3" style="text-indent:2em" , 667(4) keV , rowspan=3, 24.70(15) min , β⁺ (98%) , ¹⁹⁹Pb , rowspan=3, (1/2+) , rowspan=3, , rowspan=3, , - , IT (2%) , ¹⁹⁹Bi , - , α (.01%) , ¹⁹⁵Tl , - , style="text-indent:1em" , ^199m2Bi , , colspan="3" style="text-indent:2em" , 1947(25) keV , 0.10(3) μs , , , (25/2+) , , , - , style="text-indent:1em" , ^199m3Bi , , colspan="3" style="text-indent:2em" , ~2547.0 keV , 168(13) ns , , , 29/2− , , , - , ²⁰⁰Bi , , style="text-align:right" , 83 , style="text-align:right" , 117 , 199.978132(26) , 36.4(5) min , β⁺ , ²⁰⁰Pb , 7+ , , , - , rowspan=2 style="text-indent:1em" , ^200m1Bi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 100(70)# keV , rowspan=2, 31(2) min , EC (90%) , ²⁰⁰Pb , rowspan=2, (2+) , rowspan=2, , rowspan=2, , - , IT (10%) , ²⁰⁰Bi , - , style="text-indent:1em" , ^200m2Bi , , colspan="3" style="text-indent:2em" , 428.20(10) keV , 400(50) ms , , , (10−) , , , - , rowspan=2, ²⁰¹Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 118 , rowspan=2, 200.977009(16) , rowspan=2, 108(3) min , β⁺ (99.99%) , ²⁰¹Pb , rowspan=2, 9/2− , rowspan=2, , rowspan=2, , - , α (10⁻⁴%) , ¹⁹⁷Tl , - , rowspan=3 style="text-indent:1em" , ^201m1Bi , rowspan=3, , rowspan=3 colspan="3" style="text-indent:2em" , 846.34(21) keV , rowspan=3, 59.1(6) min , EC (92.9%) , ²⁰¹Pb , rowspan=3, 1/2+ , rowspan=3, , rowspan=3, , - , IT (6.8%) , ²⁰¹Bi , - , α (.3%) , ¹⁹⁷Tl , - , style="text-indent:1em" , ^201m2Bi , , colspan="3" style="text-indent:2em" , 1932.2+X keV , 118(28) ns , , , (25/2+) , , , - , style="text-indent:1em" , ^201m3Bi , , colspan="3" style="text-indent:2em" , 1971.2+X keV , 105(75) ns , , , (27/2+) , , , - , style="text-indent:1em" , ^201m4Bi , , colspan="3" style="text-indent:2em" , 2739.90(20)+X keV , 124(4) ns , , , (29/2−) , , , - , rowspan=2, ²⁰²Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 119 , rowspan=2, 201.977742(22) , rowspan=2, 1.72(5) h , β⁺ , ²⁰²Pb , rowspan=2, 5(+#) , rowspan=2, , rowspan=2, , - , α (10⁻⁵%) , ¹⁹⁸Tl , - , style="text-indent:1em" , ^202m1Bi , , colspan="3" style="text-indent:2em" , 615(7) keV , 3.04(6) μs , , , (10#)− , , , - , style="text-indent:1em" , ^202m2Bi , , colspan="3" style="text-indent:2em" , 2607.1(5) keV , 310(50) ns , , , (17+) , , , - , rowspan=2, ²⁰³Bi , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 120 , rowspan=2, 202.976876(23) , rowspan=2, 11.76(5) h , β⁺ , ²⁰³Pb , rowspan=2, 9/2− , rowspan=2, , rowspan=2, , - , α (10⁻⁵%) , ¹⁹⁹Tl , - , style="text-indent:1em" , ^203m1Bi , , colspan="3" style="text-indent:2em" , 1098.14(7) keV , 303(5) ms , IT , ²⁰³Bi , 1/2+ , , , - , style="text-indent:1em" , ^203m2Bi , , colspan="3" style="text-indent:2em" , 2041.5(6) keV , 194(30) ns , , , 25/2+ , , , - , ²⁰⁴Bi , , style="text-align:right" , 83 , style="text-align:right" , 121 , 203.977813(28) , 11.22(10) h , β⁺ , ²⁰⁴Pb , 6+ , , , - , style="text-indent:1em" , ^204m1Bi , , colspan="3" style="text-indent:2em" , 805.5(3) keV , 13.0(1) ms , IT , ²⁰⁴Bi , 10− , , , - , style="text-indent:1em" , ^204m2Bi , , colspan="3" style="text-indent:2em" , 2833.4(11) keV , 1.07(3) ms , , , (17+) , , , - , ²⁰⁵Bi , , style="text-align:right" , 83 , style="text-align:right" , 122 , 204.977389(8) , 15.31(4) d , β⁺ , ²⁰⁵Pb , 9/2− , , , - , ²⁰⁶Bi , , style="text-align:right" , 83 , style="text-align:right" , 123 , 205.978499(8) , 6.243(3) d , β⁺ , ²⁰⁶Pb , 6(+) , , , - , style="text-indent:1em" , ^206m1Bi , , colspan="3" style="text-indent:2em" , 59.897(17) keV , 7.7(2) μs , , , (4+) , , , - , style="text-indent:1em" , ^206m2Bi , , colspan="3" style="text-indent:2em" , 1044.8(5) keV , 890(10) μs , , , (10−) , , , - , ²⁰⁷Bi , , style="text-align:right" , 83 , style="text-align:right" , 124 , 206.9784707(26) , 32.9(14) y , β⁺ , ²⁰⁷Pb , 9/2− , , , - , style="text-indent:1em" , ^207mBi , , colspan="3" style="text-indent:2em" , 2101.49(16) keV , 182(6) μs , , , 21/2+ , , , - , ²⁰⁸Bi , , style="text-align:right" , 83 , style="text-align:right" , 125 , 207.9797422(25) , 3.68(4)×10⁵ y , β⁺ , ²⁰⁸Pb , (5)+ , , , - , style="text-indent:1em" , ^208mBi , , colspan="3" style="text-indent:2em" , 1571.1(4) keV , 2.58(4) ms , IT , ²⁰⁸Bi , (10)− , , , - , ²⁰⁹Bi
Formerly believed to be final decay product of 4n+1

decay chain In nuclear science, the decay chain refers to a series of radioactive decays of different radioactive decay products as a sequential series of transformations. It is also known as a "radioactive cascade". Most radioisotopes do not decay dire ...

Primordial

radioisotope A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess nuclear energy, making it unstable. This excess energy can be used in one of three ways: emitted from the nucleus as gamma radiation; transferr ...

, also some is radiogenic from the extinct nuclide ²³⁷Np , , style="text-align:right" , 83 , style="text-align:right" , 126 , 208.9803987(16) , 2.01(8)×10¹⁹ y
Formerly believed to be the heaviest stable nuclide , α , ²⁰⁵Tl , 9/2− , 1.0000 , , - , rowspan=2, ²¹⁰Bi , rowspan=2, Radium E , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 127 , rowspan=2, 209.9841204(16) , rowspan=2, 5.012(5) d , β⁻ , ²¹⁰Po , rowspan=2, 1− , rowspan=2, TraceIntermediate decay product of ²³⁸U , rowspan=2, , - , α (1.32×10⁻⁴%) , ²⁰⁶Tl , - , style="text-indent:1em" , ^210mBi , , colspan="3" style="text-indent:2em" , 271.31(11) keV , 3.04(6)×10⁶ y , α , ²⁰⁶Tl , 9− , , , - , rowspan=2, ²¹¹Bi , rowspan=2, Actinium C , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 128 , rowspan=2, 210.987269(6) , rowspan=2, 2.14(2) min , α (99.72%) , ²⁰⁷Tl , rowspan=2, 9/2− , rowspan=2, TraceIntermediate decay product of ²³⁵U , rowspan=2, , - , β⁻ (.276%) , ²¹¹Po , - , style="text-indent:1em" , ^211mBi , , colspan="3" style="text-indent:2em" , 1257(10) keV , 1.4(3) μs , , , (25/2−) , , , - , rowspan=3, ²¹²Bi , rowspan=3, Thorium C , rowspan=3 style="text-align:right" , 83 , rowspan=3 style="text-align:right" , 129 , rowspan=3, 211.9912857(21) , rowspan=3, 60.55(6) min , β⁻ (64.05%) , ²¹²Po , rowspan=3, 1(−) , rowspan=3, TraceIntermediate decay product of ²³²Th , rowspan=3, , - , α (35.94%) , ²⁰⁸Tl , - , β⁻, α (.014%) , ²⁰⁸Pb , - , rowspan=3 style="text-indent:1em" , ^212m1Bi , rowspan=3, , rowspan=3 colspan="3" style="text-indent:2em" , 250(30) keV , rowspan=3, 25.0(2) min , α (67%) , ²⁰⁸Tl , rowspan=3, (9−) , rowspan=3, , rowspan=3, , - , β⁻ (33%) , ^212mPo , - , β⁻, α (.3%) , ²⁰⁸Pb , - , style="text-indent:1em" , ^212m2Bi , , colspan="3" style="text-indent:2em" , 2200(200)# keV , 7.0(3) min , , , >16 , , , - , rowspan=2, ²¹³Bi
Used in

medicine Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care pr ...

such as for cancer treatment.A byproduct of thorium reactors via ²³³U. , rowspan=2, , rowspan=2 style="text-align:right" , 83 , rowspan=2 style="text-align:right" , 130 , rowspan=2, 212.994385(5) , rowspan=2, 45.59(6) min , β⁻ (97.91%) , ²¹³Po , rowspan=2, 9/2− , rowspan=2, TraceIntermediate decay product of ²³⁷Np , rowspan=2, , - , α (2.09%) , ²⁰⁹Tl , - , rowspan=3, ²¹⁴Bi , rowspan=3, Radium C , rowspan=3 style="text-align:right" , 83 , rowspan=3 style="text-align:right" , 131 , rowspan=3, 213.998712(12) , rowspan=3, 19.9(4) min , β⁻ (99.97%) , ²¹⁴Po , rowspan=3, 1− , rowspan=3, Trace , rowspan=3, , - , α (.021%) , ²¹⁰Tl , - , β⁻, α (.003%) , ²¹⁰Pb , - , ²¹⁵Bi , , style="text-align:right" , 83 , style="text-align:right" , 132 , 215.001770(16) , 7.6(2) min , β⁻ , ²¹⁵Po , (9/2−) , Trace , , - , rowspan=2 style="text-indent:1em" , ^215mBi , rowspan=2, , rowspan=2 colspan="3" style="text-indent:2em" , 1347.5(25) keV , rowspan=2, 36.9(6) s , IT (76.9%) , ²¹⁵Bi , rowspan=2, (25/2−) , rowspan=2, , rowspan=2, , - , β⁻ (23.1%) , ²¹⁵Po , - , ²¹⁶Bi , , style="text-align:right" , 83 , style="text-align:right" , 133 , 216.006306(12) , 2.17(5) min , β⁻ , ²¹⁶Po , (6-, 7-) , , , - , style="text-indent:1em" , ^216mBi , , colspan="3" style="text-indent:2em" , 24(19) keV , 6.6(21) min , β⁻ , ²¹⁶Po , 3-# , , , - , ²¹⁷Bi , , style="text-align:right" , 83 , style="text-align:right" , 134 , 217.009372(19) , 98.5(8) s , β⁻ , ²¹⁷Po , 9/2−# , , , - , style="text-indent:1em" , ^217mBi , , colspan="3" style="text-indent:2em" , 1480(40) keV , 2.70(6) μs , IT , ²¹⁷Bi , 25/2−# , , , - , ²¹⁸Bi , , style="text-align:right" , 83 , style="text-align:right" , 135 , 218.014188(29) , 33(1) s , β⁻ , ²¹⁸Po , (6-, 7-, 8-) , , , - , ²¹⁹Bi , , style="text-align:right" , 83 , style="text-align:right" , 136 , 219.017480(210)# , 8.7(29) s , β⁻ , ²¹⁹Po , 9/2-# , , , - , ²²⁰Bi , , style="text-align:right" , 83 , style="text-align:right" , 137 , 220.022350(320)# , 9.5(57) s , β⁻ , ²²⁰Po , 1-# , ,

References

* Isotope masses from: ** * Isotopic compositions and standard atomic masses from: ** ** * Half-life, spin, and isomer data selected from the following sources. ** ** ** {{Authority control Bismuth