Isotopes of bismuth

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Standard atomic mass: 208.98040(1) u

Isotopes of bismuth (Bi) occurring within the radioactive disintegration chains of actinium, radium and thorium were known as:

radium E : ²¹⁰Bi
actinium C : ²¹¹Bi
thorium C : ²¹²Bi
radium C : ²¹⁴Bi

Table

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
nuclide symbol	excitation energy			half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
¹⁸⁴Bi	83	101	184.00112(14)#	6.6(15) ms	3+#
^184mBi	150(100)# keV			13(2) ms	10-#
¹⁸⁵Bi	83	102	184.99763(6)#	2# ms	9/2-#
^185mBi	70(50)# keV			49(7) µs	1/2+
¹⁸⁶Bi	83	103	185.99660(8)	14.8(7) ms	(3+)
^186mBi	270(140)# keV			9.8(4) ms	(10-)
¹⁸⁷Bi	83	104	186.993158(16)	32(3) ms	9/2-#
^187m1Bi	101(20) keV			320(70) µs	1/2+#
^187m2Bi	252(1) keV			7(5) µs	(13/2+)
¹⁸⁸Bi	83	105	187.99227(5)	44(3) ms	3+#
^188mBi	210(140)# keV			220(40) ms	(10-)
¹⁸⁹Bi	83	106	188.98920(6)	674(11) ms	(9/2-)
^189m1Bi	181(6) keV			5.0(1) ms	(1/2+)
^189m2Bi	357(1) keV			880(50) ns	(13/2+)
¹⁹⁰Bi	83	107	189.9883(2)	6.3(1) s	(3+)
^190m1Bi	420(180) keV			6.2(1) s	(10-)
^190m2Bi	690(180) keV			>500(100) ns	7+#
¹⁹¹Bi	83	108	190.985786(8)	12.3(3) s	(9/2-)
^191mBi	240(4) keV			124(5) ms	(1/2+)
¹⁹²Bi	83	109	191.98546(4)	34.6(9) s	(3+)
^192mBi	150(30) keV			39.6(4) s	(10-)
¹⁹³Bi	83	110	192.98296(1)	67(3) s	(9/2-)
^193mBi	308(7) keV			3.2(6) s	(1/2+)
¹⁹⁴Bi	83	111	193.98283(5)	95(3) s	(3+)
^194m1Bi	110(70) keV			125(2) s	(6+,7+)
^194m2Bi	230(90)# keV			115(4) s	(10-)
¹⁹⁵Bi	83	112	194.980651(6)	183(4) s	(9/2-)
^195m1Bi	399(6) keV			87(1) s	(1/2+)
^195m2Bi	2311.4+X keV			750(50) ns	(29/2-)
¹⁹⁶Bi	83	113	195.980667(26)	5.1(2) min	(3+)
^196m1Bi	166.6(30) keV			0.6(5) s	(7+)
^196m2Bi	270(3) keV			4.00(5) min	(10-)
¹⁹⁷Bi	83	114	196.978864(9)	9.33(50) min	(9/2-)
^197m1Bi	690(110) keV			5.04(16) min	(1/2+)
^197m2Bi	2129.3(4) keV			204(18) ns	(23/2-)
^197m3Bi	2360.4(5)+X keV			263(13) ns	(29/2-)
^197m4Bi	2383.1(7)+X keV			253(39) ns	(29/2-)
^197m5Bi	2929.5(5) keV			209(30) ns	(31/2-)
¹⁹⁸Bi	83	115	197.97921(3)	10.3(3) min	(2+,3+)
^198m1Bi	280(40) keV			11.6(3) min	(7+)
^198m2Bi	530(40) keV			7.7(5) s	10-
¹⁹⁹Bi	83	116	198.977672(13)	27(1) min	9/2-
^199m1Bi	667(4) keV			24.70(15) min	(1/2+)
^199m2Bi	1947(25) keV			0.10(3) µs	(25/2+)
^199m3Bi	~2547.0 keV			168(13) ns	29/2-
²⁰⁰Bi	83	117	199.978132(26)	36.4(5) min	7+
^200m1Bi	100(70)# keV			31(2) min	(2+)
^200m2Bi	428.20(10) keV			400(50) ms	(10-)
²⁰¹Bi	83	118	200.977009(16)	108(3) min	9/2-
^201m1Bi	846.34(21) keV			59.1(6) min	1/2+
^201m2Bi	1932.2+X keV			118(28) ns	(25/2+)
^201m3Bi	1971.2+X keV			105(75) ns	(27/2+)
^201m4Bi	2739.90(20)+X keV			124(4) ns	(29/2-)
²⁰²Bi	83	119	201.977742(22)	1.72(5) h	5(+#)
^202m1Bi	615(7) keV			3.04(6) µs	(10#)-
^202m2Bi	2607.1(5) keV			310(50) ns	(17+)
²⁰³Bi	83	120	202.976876(23)	11.76(5) h	9/2-
^203m1Bi	1098.14(7) keV			303(5) ms	1/2+
^203m2Bi	2041.5(6) keV			194(30) ns	25/2+
²⁰⁴Bi	83	121	203.977813(28)	11.22(10) h	6+
^204m1Bi	805.5(3) keV			13.0(1) ms	10-
^204m2Bi	2833.4(11) keV			1.07(3) ms	(17+)
²⁰⁵Bi	83	122	204.977389(8)	15.31(4) d	9/2-
²⁰⁶Bi	83	123	205.978499(8)	6.243(3) d	6(+)
^206m1Bi	59.897(17) keV			7.7(2) µs	(4+)
^206m2Bi	1044.8(5) keV			890(10) µs	(10-)
²⁰⁷Bi	83	124	206.9784707(26)	32.9(14) a	9/2-
^207mBi	2101.49(16) keV			182(6) µs	21/2+
²⁰⁸Bi	83	125	207.9797422(25)	3.68(4)E+5 a	(5)+
^208mBi	1571.1(4) keV			2.58(4) ms	(10)-
²⁰⁹Bi	83	126	208.9803987(16)	1.9(2)E+19 a	9/2-	1.0000
²¹⁰Bi	83	127	209.9841204(16)	5.012(5) d	1-
^210mBi	271.31(11) keV			3.04(6)E+6 a	9-
²¹¹Bi	83	128	210.987269(6)	2.14(2) min	9/2-
^211mBi	1257(10) keV			1.4(3) µs	(25/2-)
²¹²Bi	83	129	211.9912857(21)	60.55(6) min	1(-)
^212m1Bi	250(30) keV			25.0(2) min	(9-)
^212m2Bi	2200(200)# keV			7.0(3) min	>15
²¹³Bi	83	130	212.994385(5)	45.59(6) min	9/2-
²¹⁴Bi	83	131	213.998712(12)	19.9(4) min	1-
²¹⁵Bi	83	132	215.001770(16)	7.6(2) min	(9/2-)
^215mBi	1347.5(25) keV			36.4(25) min	(25/2-)
²¹⁶Bi	83	133	216.006306(12)	2.17(5) min	1-#
²¹⁷Bi	83	134	217.00947(21)#	98.5(8) s	9/2-#
²¹⁸Bi	83	135	218.01432(39)#	33(1) s	1-#

Notes

Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.

References

Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.

Isotopes of lead	Isotopes of bismuth	Isotopes of polonium
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Isotopes of bismuth

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