Isotopes of tungsten

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Tungsten (W)
Standard atomic mass: 183.84(1) u

[edit] 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)
	excitation energy
158W	74	84	157.97456(54)#	1.37(17) ms	0+
158mW	1889(8) keV			143(19) µs	8+
159W	74	85	158.97292(43)#	8.2(7) ms	7/2-#
160W	74	86	159.96848(22)	90(5) ms	0+
161W	74	87	160.96736(21)#	409(16) ms	7/2-#
162W	74	88	161.963497(19)	1.36(7) s	0+
163W	74	89	162.96252(6)	2.8(2) s	3/2-#
164W	74	90	163.958954(13)	6.3(2) s	0+
165W	74	91	164.958280(27)	5.1(5) s	3/2-#
166W	74	92	165.955027(11)	19.2(6) s	0+
167W	74	93	166.954816(21)	19.9(5) s	3/2-#
168W	74	94	167.951808(17)	51(2) s	0+
169W	74	95	168.951779(17)	76(6) s	(5/2-)
170W	74	96	169.949228(16)	2.42(4) min	0+
171W	74	97	170.94945(3)	2.38(4) min	(5/2-)
172W	74	98	171.94729(3)	6.6(9) min	0+
173W	74	99	172.94769(3)	7.6(2) min	5/2-
174W	74	100	173.94608(3)	33.2(21) min	0+
175W	74	101	174.94672(3)	35.2(6) min	(1/2-)
176W	74	102	175.94563(3)	2.5(1) h	0+
177W	74	103	176.94664(3)	132(2) min	1/2-
178W	74	104	177.945876(16)	21.6(3) d	0+
179W	74	105	178.947070(17)	37.05(16) min	(7/2)-
179m1W	221.926(8) keV			6.40(7) min	(1/2)-
179m2W	1631.90(8) keV			390(30) ns	(21/2+)
179m3W	3348.45(16) keV			750(80) ns	(35/2-)
180W	74	106	179.946704(4)	STABLE [>700E+15 a]	0+	0.0012(1)
180m1W	1529.04(3) keV			5.47(9) ms	8-
180m2W	3264.56(21) keV			2.33(19) µs	14-
181W	74	107	180.948197(5)	121.2(2) d	9/2+
182W	74	108	181.9482042(9)	STABLE [>170E+18 a]	0+	0.2650(16)
183W	74	109	182.9502230(9)	STABLE [>80E+18 a]	1/2-	0.1431(4)
183mW	309.493(3) keV			5.2(3) s	11/2+
184W	74	110	183.9509312(9)	STABLE [>180E+18 a]	0+	0.3064(2)
185W	74	111	184.9534193(10)	75.1(3) d	3/2-
185mW	197.43(5) keV			1.597(4) min	11/2+
186W	74	112	185.9543641(19)	STABLE [>4.1E+18 a]	0+	0.2843(19)
186m1W	1517.2(6) keV			18(1) µs	(7-)
186m2W	3542.8(21) keV			>3 ms	(16+)
187W	74	113	186.9571605(19)	23.72(6) h	3/2-
188W	74	114	187.958489(4)	69.78(5) d	0+
189W	74	115	188.96191(21)	11.6(3) min	(3/2-)
190W	74	116	189.96318(18)	30.0(15) min	0+
190mW	2381(5) keV			<3.1 ms	(10-)
191W	74	117	190.96660(21)#	20# s [>300 ns]	3/2-#
192W	74	118	191.96817(64)#	10# s [>300 ns]	0+

[edit] 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.

[edit] 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 tantalum	Isotopes of tungsten	Isotopes of rhenium
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