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Isotopes of tungsten

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Main isotopes			Decay
Isotope	abundance	half-life(t_1/2)	mode	product
¹⁸⁰W	0.120%	1.59×10¹⁸ y^[1]	α	¹⁷⁶Hf
¹⁸¹W	synth	120.96 d	ε	¹⁸¹Ta
¹⁸²W	26.5%	stable
¹⁸³W	14.3%	stable
¹⁸⁴W	30.6%	stable
¹⁸⁵W	synth	75.1 d	β⁻	¹⁸⁵Re
¹⁸⁶W	28.4%	stable
¹⁸⁷W	synth	23.81 h	β⁻	¹⁸⁷Re
¹⁸⁸W	synth	69.77 d	β⁻	¹⁸⁸Re

Standard atomic weightA_r°(W)

183.84±0.01^[2]
183.84±0.01 (abridged)^[3]

Naturally occurringtungsten (₇₄W) consists of fiveisotopes. Four are consideredstable (¹⁸²W,¹⁸³W,¹⁸⁴W, and¹⁸⁶W) and one is slightlyradioactive,¹⁸⁰W, with an extremely longhalf-life of(1.59±0.05)×10¹⁸ years.^[1] This results in about twoalpha decays of¹⁸⁰W per gram of natural tungsten per year, so for most practical purposes,¹⁸⁰W can be considered stable. The other naturally occurring isotopes are also capable of alpha decay and so onlyobservationally stable.

Artificialradioisotopes of tungsten have been observed from¹⁵⁶W to¹⁹⁷W, the most stable of which are¹⁸¹W with a half-life of 120.96 days,¹⁸⁵W with a half-life of 75.1 days,¹⁸⁸W with a half-life of 69.77 days and¹⁷⁸W with a half-life of 21.6 days. All of the remainingradioactive isotopes have half-lives less than one day, and most of these less than 8 minutes. The most stable knownmeta state is^179m1W with half-life 6.40 minutes.

List of isotopes

[edit]

Nuclide ^{[n 1]}	Z	N	Isotopic mass(Da)^[4] ^{[n 2]}^{[n 3]}	Half-life^[5] ^{[n 4]}^{[n 5]}	Decay mode^[5] ^{[n 6]}	Daughter isotope ^{[n 7]}^{[n 8]}	Spin and parity^[5] ^{[n 9]}^{[n 5]}	Natural abundance(mole fraction)
Nuclide ^{[n 1]}	Excitation energy			Half-life^[5] ^{[n 4]}^{[n 5]}	Decay mode^[5] ^{[n 6]}	Daughter isotope ^{[n 7]}^{[n 8]}	Spin and parity^[5] ^{[n 9]}^{[n 5]}	Normal proportion^[5]	Range of variation
¹⁵⁶W^[6]	74	82		157+57 −34 ms	β⁺	¹⁵⁶Ta	0+
¹⁵⁷W^[7]	74	83	156.97886(43)#	275(40) ms	β⁺	¹⁵⁷Ta	(7/2−)
¹⁵⁸W	74	84	157.97457(32)#	1.43(18) ms	α	¹⁵⁴Hf	0+
^158mW	1889(8) keV			143(19) μs	α	¹⁵⁴Hf	(8+)
¹⁵⁹W	74	85	158.97270(32)#	8.2(7) ms	α (82%)	¹⁵⁵Hf	7/2−#
¹⁶⁰W	74	86	159.96851(16)	90(5) ms	α (87%)	¹⁵⁶Hf	0+
¹⁶⁰W	74	86	159.96851(16)	90(5) ms	β⁺ (13%)	¹⁶⁰Ta	0+
¹⁶¹W	74	87	160.96725(22)#	409(16) ms	α (73%)	¹⁵⁷Hf	7/2−#
¹⁶¹W	74	87	160.96725(22)#	409(16) ms	β⁺ (27%)	¹⁶¹Ta	7/2−#
¹⁶²W	74	88	161.963500(19)	1.19(12) s	β⁺ (54.8%)	¹⁶²Ta	0+
¹⁶²W	74	88	161.963500(19)	1.19(12) s	α (45.2%)	¹⁵⁸Hf	0+
¹⁶³W	74	89	162.962524(63)	2.63(9) s	β⁺ (86%)	¹⁶³Ta	7/2−
¹⁶³W	74	89	162.962524(63)	2.63(9) s	α (14%)	¹⁵⁹Hf	7/2−
^163mW	480.3(7) keV			154(3) ns	IT	¹⁶³W	13/2+
¹⁶⁴W	74	90	163.958952(10)	6.3(2) s	β⁺ (96.2%)	¹⁶⁴Ta	0+
¹⁶⁴W	74	90	163.958952(10)	6.3(2) s	α (3.8%)	¹⁶⁰Hf	0+
¹⁶⁵W	74	91	164.958281(28)	5.1(5) s	β⁺	¹⁶⁵Ta	(5/2−)
¹⁶⁶W	74	92	165.955032(10)	19.2(6) s	β⁺ (99.97%)	¹⁶⁶Ta	0+
¹⁶⁶W	74	92	165.955032(10)	19.2(6) s	α (0.035%)	¹⁶²Hf	0+
¹⁶⁷W	74	93	166.954811(20)	19.9(5) s	β⁺ (99.96%)	¹⁶⁷Ta	(5/2−)
¹⁶⁷W	74	93	166.954811(20)	19.9(5) s	α (0.04%)	¹⁶³Hf	(5/2−)
¹⁶⁸W	74	94	167.951805(14)	50.9(19) s	β⁺ (99.97%)	¹⁶⁸Ta	0+
¹⁶⁸W	74	94	167.951805(14)	50.9(19) s	α (0.032%)	¹⁶⁴Hf	0+
¹⁶⁹W	74	95	168.951779(17)	74(6) s	β⁺	¹⁶⁹Ta	5/2−#
¹⁷⁰W	74	96	169.949231(14)	2.42(4) min	β⁺(99%)	¹⁷⁰Ta	0+
¹⁷¹W	74	97	170.949451(30)	2.38(4) min	β⁺	¹⁷¹Ta	(5/2−)
¹⁷²W	74	98	171.947292(30)	6.6(9) min	β⁺	¹⁷²Ta	0+
¹⁷³W	74	99	172.947689(30)	7.6(2) min	β⁺	¹⁷³Ta	5/2−
¹⁷⁴W	74	100	173.946079(30)	33.2(21) min	β⁺	¹⁷⁴Ta	0+
^174m1W	2267.8(4) keV			158(3) ns	IT	¹⁷⁴W	8−
^174m2W	3515.6(4) keV			128(8) ns	IT	¹⁷⁴W	12+
¹⁷⁵W	74	101	174.946717(30)	35.2(6) min	β⁺	¹⁷⁵Ta	(1/2−)
^175mW	234.96(15) keV			216(6) ns	IT	¹⁷⁵W	(7/2+)
¹⁷⁶W	74	102	175.945634(30)	2.5(1) h	EC	¹⁷⁶Ta	0+
¹⁷⁷W	74	103	176.946643(30)	132.4(20) min	β⁺	¹⁷⁷Ta	1/2−
¹⁷⁸W	74	104	177.945886(16)	21.6(3) d	EC	¹⁷⁸Ta	0+
^178mW	6572.7(3) keV			220(10) ns	IT	¹⁷⁸W	25+
¹⁷⁹W	74	105	178.947079(16)	37.05(16) min	β⁺	¹⁷⁹Ta	7/2−
^179m1W	221.91(3) keV			6.40(7) min	IT (99.71%)	¹⁷⁹W	1/2−
^179m1W	221.91(3) keV			6.40(7) min	β⁺ (0.29%)	¹⁷⁹Ta	1/2−
^179m2W	1631.90(8) keV			390(30) ns	IT	¹⁷⁹W	21/2+
^179m3W	3348.41(14) keV			750(80) ns	IT	¹⁷⁹W	35/2−
¹⁸⁰W^{[n 10]}	74	106	179.9467133(15)	1.59(5)×10¹⁸ y^[1]	α	¹⁷⁶Hf	0+	0.0012(1)
^180m1W	1529.05(4) keV			5.47(9) ms	IT	¹⁸⁰W	8−
^180m2W	3264.7(3) keV			2.33(19) μs	IT	¹⁸⁰W	14−
¹⁸¹W	74	107	180.9482187(16)	120.956(19) d	EC	¹⁸¹Ta	9/2+
^181m1W	365.55(13) keV			14.59(15) μs	IT	¹⁸¹W	5/2−
^181m2W	1653.0(3) keV			200(13) ns	IT	¹⁸¹W	21/2+
¹⁸²W	74	108	181.94820564(80)	Observationally Stable^{[n 11]}			0+	0.2650(16)
^182mW	2230.65(14) keV			1.3(1) μs	IT	¹⁸²W	10+
¹⁸³W	74	109	182.95022442(80)	Observationally Stable^{[n 12]}			1/2−	0.1431(4)
^183mW	309.492(4) keV			5.30(8) s	IT	¹⁸³W	11/2+
¹⁸⁴W	74	110	183.95093318(79)	Observationally Stable^{[n 13]}			0+	0.3064(2)
^184m1W	1284.997(8) keV			8.33(18) μs	IT	¹⁸⁴W	5−
^184m2W	4127.7(5) keV			188(38) ns	IT	¹⁸⁴W	(14+)
¹⁸⁵W	74	111	184.95342121(79)	75.1(3) d	β⁻	¹⁸⁵Re	3/2−
^185mW	197.383(23) keV			1.597(4) min	IT	¹⁸⁵W	11/2+
¹⁸⁶W	74	112	185.9543651(13)	Observationally Stable^{[n 14]}			0+	0.2843(19)
^186m1W	1517.2(6) keV			18(1) μs	IT	¹⁸⁶W	7−
^186m2W	3542.8(21) keV			2.0(2) s	IT	¹⁸⁶W	16+
¹⁸⁷W	74	113	186.9571612(13)	23.809(25) h	β⁻	¹⁸⁷Re	3/2−
^187mW	410.06(4) keV			1.54(13) μs^[8]	IT	¹⁸⁷W	11/2+
¹⁸⁸W	74	114	187.9584883(33)	69.77(5) d	β⁻	¹⁸⁸Re	0+
^188mW	1926.7(8) keV			109.5(35) ns	IT	¹⁸⁸W	8−
¹⁸⁹W	74	115	188.96156(22)#	11.6(2) min	β⁻	¹⁸⁹Re	9/2−#
¹⁹⁰W	74	116	189.963104(38)	30.0(15) min	β⁻	¹⁹⁰Re	0+
^190m1W	1743.6(10) keV			111(17) ns	IT	¹⁹⁰W	8+
^190m2W	1840.6(14) keV			166(6) μs	IT	¹⁹⁰W	10−
¹⁹¹W	74	117	190.966531(45)	14# s [>300 ns]			3/2−#
^191mW	235(10)# keV			340(14) ns	IT	¹⁹¹W	9/2−#
¹⁹²W	74	118	191.96820(22)#	40# s [>300 ns]			0+
¹⁹³W	74	119	192.97188(22)#	30# s [>300 ns]			1/2−#
¹⁹⁴W	74	120	193.97380(32)#	20# s [>300 ns]			0+
¹⁹⁵W	74	121	194.97774(32)#	30# s [>160 ns]			3/2−#
¹⁹⁶W	74	122	195.97988(43)#	25# s [>300 ns]			0+
¹⁹⁷W	74	123	196.98404(43)#	1# s [>300 ns]			5/2−#
This table header & footer: view

^^mW – Excitednuclear isomer.
^( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
^# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
^Bold half-life – nearly stable, half-life longer thanage of universe.
^^a ^b# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
^Modes of decay:
α: Alpha decay
β⁺: Positron emission
EC: Electron capture
β⁻: Beta decay
IT: Isomeric transition
^Bold italics symbol as daughter – Daughter product is nearly stable.
^Bold symbol as daughter – Daughter product is stable.
^( ) spin value – Indicates spin with weak assignment arguments.
^Primordial radionuclide
^Believed to undergo α decay to¹⁷⁸Hf with a half-life over 7.7×10²¹ y
^Believed to undergo α decay to¹⁷⁹Hf with a half-life over 6.70×10²⁰ y
^Believed to undergo α decay to¹⁸⁰Hf with a half-life over 8.9×10²¹ y
^Believed to undergo α decay to¹⁸²Hf with a half-life over 8.2×10²¹ y, or β⁻β⁻ decay to¹⁸⁶Os with a half-life over 4.1×10¹⁸ y

References

[edit]

^^a ^b ^cMünster, A.; Sivers, M. v.; Angloher, G.; Bento, A.; Bucci, C.; Canonica, L.; Erb, A.; Feilitzsch, F. v.; Gorla, P.; Gütlein, A.; Hauff, D.; Jochum, J.; Kraus, H.; Lanfranchi, J. -C.; Laubenstein, M.; Loebell, J.; Ortigoza, Y.; Petricca, F.; Potzel, W.; Pröbst, F.; Puimedon, J.; Reindl, F.; Roth, S.; Rottler, K.; Sailer, C.; Schäffner, K.; Schieck, J.; Scholl, S.; Schönert, S.; Seidel, W.; Stodolsky, L.; Strandhagen, C.; Strauss, R.; Tanzke, A.; Uffinger, M.; Ulrich, A.; Usherov, I.; Wawoczny, S.; Willers, M.; Wüstrich, M.; Zöller, A. (May 2014). "Radiopurity of CaWO₄ crystals for direct dark matter search with CRESST and EURECA".Journal of Cosmology and Astroparticle Physics (05).arXiv:1403.5114.Bibcode:2014JCAP...05..018M.doi:10.1088/1475-7516/2014/05/018. 018.
^"Standard Atomic Weights: Tungsten".CIAAW. 1991.
^Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04)."Standard atomic weights of the elements 2021 (IUPAC Technical Report)".Pure and Applied Chemistry.doi:10.1515/pac-2019-0603.ISSN 1365-3075.
^Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*".Chinese Physics C.45 (3) 030003.doi:10.1088/1674-1137/abddaf.
^^a ^b ^c ^dKondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021)."The NUBASE2020 evaluation of nuclear properties"(PDF).Chinese Physics C.45 (3) 030001.doi:10.1088/1674-1137/abddae.
^Briscoe, A. D.; Page, R. D.; Uusitalo, J.; et al. (2023)."Decay spectroscopy at the two-proton drip line: Radioactivity of the new nuclides¹⁶⁰Os and¹⁵⁶W".Physics Letters B.47 (138310).doi:10.1016/j.physletb.2023.138310.hdl:10272/23933.
^Bianco, L.; Page, R. D.; Darby, I. G.; et al. (7 June 2010)."Discovery of¹⁵⁷W and¹⁶¹Os"(PDF).Physics Letters B.690 (1):15–18.Bibcode:2010PhLB..690...15B.doi:10.1016/j.physletb.2010.04.056.ISSN 0370-2693.S2CID 117121162. Retrieved11 June 2023.
^Chen, J. L.; Watanabe, H.; Walker, P. M.; et al. (2025). "Direct observation ofβ andγ decay from a high-spin long-lived isomer in¹⁸⁷Ta".Physical Review C.111 (014304).arXiv:2501.02848.doi:10.1103/PhysRevC.111.014304.

Isotopes of thechemical elements

Group	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period	Hydrogen and alkali metals	Alkaline earth metals													Pnictogens	Chalcogens	Halogens	Noble gases
①	Isotopes § List H 1																	Isotopes § List He 2
②	Isotopes § List Li 3	Isotopes § List Be 4											Isotopes § List B 5	Isotopes § List C 6	Isotopes § List N 7	Isotopes § List O 8	Isotopes § List F 9	Isotopes § List Ne 10
③	Isotopes § List Na 11	Isotopes § List Mg 12											Isotopes § List Al 13	Isotopes § List Si 14	Isotopes § List P 15	Isotopes § List S 16	Isotopes § List Cl 17	Isotopes § List Ar 18
④	Isotopes § List K 19	Isotopes § List Ca 20	Isotopes § List Sc 21	Isotopes § List Ti 22	Isotopes § List V 23	Isotopes § List Cr 24	Isotopes § List Mn 25	Isotopes § List Fe 26	Isotopes § List Co 27	Isotopes § List Ni 28	Isotopes § List Cu 29	Isotopes § List Zn 30	Isotopes § List Ga 31	Isotopes § List Ge 32	Isotopes § List As 33	Isotopes § List Se 34	Isotopes § List Br 35	Isotopes § List Kr 36
⑤	Isotopes § List Rb 37	Isotopes § List Sr 38	Isotopes § List Y 39	Isotopes § List Zr 40	Isotopes § List Nb 41	Isotopes § List Mo 42	Isotopes § List Tc 43	Isotopes § List Ru 44	Isotopes § List Rh 45	Isotopes § List Pd 46	Isotopes § List Ag 47	Isotopes § List Cd 48	Isotopes § List In 49	Isotopes § List Sn 50	Isotopes § List Sb 51	Isotopes § List Te 52	Isotopes § List I 53	Isotopes § List Xe 54
⑥	Isotopes § List Cs 55	Isotopes § List Ba 56	Isotopes § List Lu 71	Isotopes § List Hf 72	Isotopes § List Ta 73	Isotopes § List W 74	Isotopes § List Re 75	Isotopes § List Os 76	Isotopes § List Ir 77	Isotopes § List Pt 78	Isotopes § List Au 79	Isotopes § List Hg 80	Isotopes § List Tl 81	Isotopes § List Pb 82	Isotopes § List Bi 83	Isotopes § List Po 84	Isotopes § List At 85	Isotopes § List Rn 86
⑦	Isotopes § List Fr 87	Isotopes § List Ra 88	Isotopes § List Lr 103	Isotopes § List Rf 104	Isotopes § List Db 105	Isotopes § List Sg 106	Isotopes § List Bh 107	Isotopes § List Hs 108	Isotopes § List Mt 109	Isotopes § List Ds 110	Isotopes § List Rg 111	Isotopes § List Cn 112	Isotopes § List Nh 113	Isotopes § List Fl 114	Isotopes § List Mc 115	Isotopes § List Lv 116	Isotopes § List Ts 117	Isotopes § List Og 118
⑧	Isotopes § List Uue 119	Isotopes § List Ubn 120

			Isotopes § List La 57	Isotopes § List Ce 58	Isotopes § List Pr 59	Isotopes § List Nd 60	Isotopes § List Pm 61	Isotopes § List Sm 62	Isotopes § List Eu 63	Isotopes § List Gd 64	Isotopes § List Tb 65	Isotopes § List Dy 66	Isotopes § List Ho 67	Isotopes § List Er 68	Isotopes § List Tm 69	Isotopes § List Yb 70
			Isotopes § List Ac 89	Isotopes § List Th 90	Isotopes § List Pa 91	Isotopes § List U 92	Isotopes § List Np 93	Isotopes § List Pu 94	Isotopes § List Am 95	Isotopes § List Cm 96	Isotopes § List Bk 97	Isotopes § List Cf 98	Isotopes § List Es 99	Isotopes § List Fm 100	Isotopes § List Md 101	Isotopes § List No 102

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α:	Alpha decay
β⁺:	Positron emission
EC:	Electron capture
β⁻:	Beta decay
IT:	Isomeric transition

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List of isotopes

See also

References