Isotopes of tungsten

Naturally occurring tungsten (₇₄W) consists of five isotopes. Four are considered stable (¹⁸²W, ¹⁸³W, ¹⁸⁴W, and ¹⁸⁶W) and one is slightly radioactive, ¹⁸⁰W, with an extremely long half-life of . This results in about two alpha decays of ¹⁸⁰W 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 only observationally stable.

Artificial radioisotopes of tungsten have been observed from ¹⁵⁶W to ¹⁹⁷W, the most stable of which are ¹⁸¹W 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 and ¹⁷⁸W with a half-life of 21.6 days. All of the remaining radioactive isotopes have half-lives less than one day, and most of these less than 8 minutes. The most stable known meta state is ^179m1W with half-life 6.40 minutes.

List of isotopes

|-id=Tungsten-156 | ¹⁵⁶W | style="text-align:right" | 74 | style="text-align:right" | 82 | | | β⁺ | ¹⁵⁶Ta | 0+ | | |-id=Tungsten-157 | ¹⁵⁷W | style="text-align:right" | 74 | style="text-align:right" | 83 | 156.97886(43)# | 275(40) ms | β⁺ | ¹⁵⁷Ta | (7/2−) | |

|-id=Tungsten-158 | ¹⁵⁸W | style="text-align:right" | 74 | style="text-align:right" | 84 | 157.97457(32)# | 1.43(18)&nbsp;ms | α | ¹⁵⁴Hf | 0+ | | |-id=Tungsten-158m | style="text-indent:1em" | ^158mW | colspan="3" style="text-indent:2em" | 1889(8)&nbsp;keV | 143(19)&nbsp;μs | α | ¹⁵⁴Hf | (8+) | | |-id=Tungsten-159 | ¹⁵⁹W | style="text-align:right" | 74 | style="text-align:right" | 85 | 158.97270(32)# | 8.2(7)&nbsp;ms | α (82%) | ¹⁵⁵Hf | 7/2−# | | |-id=Tungsten-160 | rowspan=2|¹⁶⁰W | rowspan=2 style="text-align:right" | 74 | rowspan=2 style="text-align:right" | 86 | rowspan=2|159.96851(16) | rowspan=2|90(5)&nbsp;ms | α (87%) | ¹⁵⁶Hf | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β⁺ (13%) | ¹⁶⁰Ta |-id=Tungsten-161 | rowspan=2|¹⁶¹W | rowspan=2 style="text-align:right" | 74 | rowspan=2 style="text-align:right" | 87 | rowspan=2|160.96725(22)# | rowspan=2|409(16)&nbsp;ms | α (73%) | ¹⁵⁷Hf | rowspan=2|7/2−# | rowspan=2| | rowspan=2| |- | β⁺ (27%) | ¹⁶¹Ta |-id=Tungsten-162 | rowspan=2|¹⁶²W | rowspan=2 style="text-align:right" | 74 | rowspan=2 style="text-align:right" | 88 | rowspan=2|161.963500(19) | rowspan=2|1.19(12)&nbsp;s | β⁺ (54.8%) | ¹⁶²Ta | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | α (45.2%) | ¹⁵⁸Hf |-id=Tungsten-163 | rowspan=2|¹⁶³W | rowspan=2 style="text-align:right" | 74 | rowspan=2 style="text-align:right" | 89 | rowspan=2|162.962524(63) | rowspan=2|2.63(9)&nbsp;s | β⁺ (86%) | ¹⁶³Ta | rowspan=2|7/2− | rowspan=2| | rowspan=2| |- | α (14%) | ¹⁵⁹Hf |-id=Tungsten-163m | style="text-indent:1em" | ^163mW | colspan="3" style="text-indent:2em" | 480.3(7)&nbsp;keV | 154(3)&nbsp;ns | IT | ¹⁶³W | 13/2+ | | |-id=Tungsten-164 | rowspan=2|¹⁶⁴W | rowspan=2 style="text-align:right" | 74 | rowspan=2 style="text-align:right" | 90 | rowspan=2|163.958952(10) | rowspan=2|6.3(2)&nbsp;s | β⁺ (96.2%) | ¹⁶⁴Ta | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | α (3.8%) | ¹⁶⁰Hf |-id=Tungsten-165 | ¹⁶⁵W | style="text-align:right" | 74 | style="text-align:right" | 91 | 164.958281(28) | 5.1(5)&nbsp;s | β⁺ | ¹⁶⁵Ta | (5/2−) | | |-id=Tungsten-166 | rowspan=2|¹⁶⁶W | rowspan=2 style="text-align:right" | 74 | rowspan=2 style="text-align:right" | 92 | rowspan=2|165.955032(10) | rowspan=2|19.2(6)&nbsp;s | β⁺ (99.97%) | ¹⁶⁶Ta | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | α (0.035%) | ¹⁶²Hf |-id=Tungsten-167 | rowspan=2|¹⁶⁷W | rowspan=2 style="text-align:right" | 74 | rowspan=2 style="text-align:right" | 93 | rowspan=2|166.954811(20) | rowspan=2|19.9(5)&nbsp;s | β⁺ (99.96%) | ¹⁶⁷Ta | rowspan=2|(5/2−) | rowspan=2| | rowspan=2| |- | α (0.04%) | ¹⁶³Hf |-id=Tungsten-168 | rowspan=2|¹⁶⁸W | rowspan=2 style="text-align:right" | 74 | rowspan=2 style="text-align:right" | 94 | rowspan=2|167.951805(14) | rowspan=2|50.9(19)&nbsp;s | β⁺ (99.97%) | ¹⁶⁸Ta | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | α (0.032%) | ¹⁶⁴Hf |-id=Tungsten-169 | ¹⁶⁹W | style="text-align:right" | 74 | style="text-align:right" | 95 | 168.951779(17) | 74(6)&nbsp;s | β⁺ | ¹⁶⁹Ta | 5/2−# | | |-id=Tungsten-170 | ¹⁷⁰W | style="text-align:right" | 74 | style="text-align:right" | 96 | 169.949231(14) | 2.42(4)&nbsp;min | β⁺(99%) | ¹⁷⁰Ta | 0+ | | |-id=Tungsten-171 | ¹⁷¹W | style="text-align:right" | 74 | style="text-align:right" | 97 | 170.949451(30) | 2.38(4)&nbsp;min | β⁺ | ¹⁷¹Ta | (5/2−) | | |-id=Tungsten-172 | ¹⁷²W | style="text-align:right" | 74 | style="text-align:right" | 98 | 171.947292(30) | 6.6(9)&nbsp;min | β⁺ | ¹⁷²Ta | 0+ | | |-id=Tungsten-173 | ¹⁷³W | style="text-align:right" | 74 | style="text-align:right" | 99 | 172.947689(30) | 7.6(2)&nbsp;min | β⁺ | ¹⁷³Ta | 5/2− | | |-id=Tungsten-174 | ¹⁷⁴W | style="text-align:right" | 74 | style="text-align:right" | 100 | 173.946079(30) | 33.2(21)&nbsp;min | β⁺ | ¹⁷⁴Ta | 0+ | | |-id=Tungsten-174m1 | style="text-indent:1em" | ^174m1W | colspan="3" style="text-indent:2em" | 2267.8(4)&nbsp;keV | 158(3)&nbsp;ns | IT | ¹⁷⁴W | 8− | | |-id=Tungsten-174m2 | style="text-indent:1em" | ^174m2W | colspan="3" style="text-indent:2em" | 3515.6(4)&nbsp;keV | 128(8)&nbsp;ns | IT | ¹⁷⁴W | 12+ | | |-id=Tungsten-175 | ¹⁷⁵W | style="text-align:right" | 74 | style="text-align:right" | 101 | 174.946717(30) | 35.2(6)&nbsp;min | β⁺ | ¹⁷⁵Ta | (1/2−) | | |-id=Tungsten-175m | style="text-indent:1em" | ^175mW | colspan="3" style="text-indent:2em" | 234.96(15)&nbsp;keV | 216(6)&nbsp;ns | IT | ¹⁷⁵W | (7/2+) | | |-id=Tungsten-176 | ¹⁷⁶W | style="text-align:right" | 74 | style="text-align:right" | 102 | 175.945634(30) | 2.5(1)&nbsp;h | EC | ¹⁷⁶Ta | 0+ | | |-id=Tungsten-177 | ¹⁷⁷W | style="text-align:right" | 74 | style="text-align:right" | 103 | 176.946643(30) | 132.4(20)&nbsp;min | β⁺ | ¹⁷⁷Ta | 1/2− | | |-id=Tungsten-178 | ¹⁷⁸W | style="text-align:right" | 74 | style="text-align:right" | 104 | 177.945886(16) | 21.6(3)&nbsp;d | EC | ¹⁷⁸Ta | 0+ | | |-id=Tungsten-178m | style="text-indent:1em" | ^178mW | colspan="3" style="text-indent:2em" | 6572.7(3)&nbsp;keV | 220(10)&nbsp;ns | IT | ¹⁷⁸W | 25+ | | |-id=Tungsten-179 | ¹⁷⁹W | style="text-align:right" | 74 | style="text-align:right" | 105 | 178.947079(16) | 37.05(16)&nbsp;min | β⁺ | ¹⁷⁹Ta | 7/2− | | |-id=Tungsten-179m1 | rowspan=2 style="text-indent:1em" | ^179m1W | rowspan=2 colspan="3" style="text-indent:2em" | 221.91(3)&nbsp;keV | rowspan=2|6.40(7)&nbsp;min | IT (99.71%) | ¹⁷⁹W | rowspan=2|1/2− | rowspan=2| | rowspan=2| |- | β⁺ (0.29%) | ¹⁷⁹Ta |-id=Tungsten-179m2 | style="text-indent:1em" | ^179m2W | colspan="3" style="text-indent:2em" | 1631.90(8)&nbsp;keV | 390(30)&nbsp;ns | IT | ¹⁷⁹W | 21/2+ | | |-id=Tungsten-179m3 | style="text-indent:1em" | ^179m3W | colspan="3" style="text-indent:2em" | 3348.41(14)&nbsp;keV | 750(80)&nbsp;ns | IT | ¹⁷⁹W | 35/2− | | |-id=Tungsten-180 | ¹⁸⁰W | style="text-align:right" | 74 | style="text-align:right" | 106 | 179.9467133(15) | 1.59(5)×10¹⁸&nbsp;y | α | ¹⁷⁶Hf | 0+ | 0.0012(1) | |-id=Tungsten-180m1 | style="text-indent:1em" | ^180m1W | colspan="3" style="text-indent:2em" | 1529.05(4)&nbsp;keV | 5.47(9)&nbsp;ms | IT | ¹⁸⁰W | 8− | | |-id=Tungsten-180m2 | style="text-indent:1em" | ^180m2W | colspan="3" style="text-indent:2em" | 3264.7(3)&nbsp;keV | 2.33(19)&nbsp;μs | IT | ¹⁸⁰W | 14− | | |-id=Tungsten-181 | ¹⁸¹W | style="text-align:right" | 74 | style="text-align:right" | 107 | 180.9482187(16) | 120.956(19)&nbsp;d | EC | ¹⁸¹Ta | 9/2+ | | |-id=Tungsten-181m1 | style="text-indent:1em" | ^181m1W | colspan="3" style="text-indent:2em" | 365.55(13)&nbsp;keV | 14.59(15)&nbsp;μs | IT | ¹⁸¹W | 5/2− | | |-id=Tungsten-181m2 | style="text-indent:1em" | ^181m2W | colspan="3" style="text-indent:2em" | 1653.0(3)&nbsp;keV | 200(13)&nbsp;ns | IT | ¹⁸¹W | 21/2+ | | |-id=Tungsten-182 | ¹⁸²W | style="text-align:right" | 74 | style="text-align:right" | 108 | 181.94820564(80) | colspan=3 align=center|Observationally Stable | 0+ | 0.2650(16) | |-id=Tungsten-182m | style="text-indent:1em" | ^182mW | colspan="3" style="text-indent:2em" | 2230.65(14)&nbsp;keV | 1.3(1)&nbsp;μs | IT | ¹⁸²W | 10+ | | |-id=Tungsten-183 | ¹⁸³W | style="text-align:right" | 74 | style="text-align:right" | 109 | 182.95022442(80) | colspan=3 align=center|Observationally Stable | 1/2− | 0.1431(4) | |-id=Tungsten-183m | style="text-indent:1em" | ^183mW | colspan="3" style="text-indent:2em" | 309.492(4)&nbsp;keV | 5.30(8)&nbsp;s | IT | ¹⁸³W | 11/2+ | | |-id=Tungsten-184 | ¹⁸⁴W | style="text-align:right" | 74 | style="text-align:right" | 110 | 183.95093318(79) | colspan=3 align=center|Observationally Stable | 0+ | 0.3064(2) | |-id=Tungsten-184m1 | style="text-indent:1em" | ^184m1W | colspan="3" style="text-indent:2em" | 1284.997(8)&nbsp;keV | 8.33(18)&nbsp;μs | IT | ¹⁸⁴W | 5− | | |-id=Tungsten-184m2 | style="text-indent:1em" | ^184m2W | colspan="3" style="text-indent:2em" | 4127.7(5)&nbsp;keV | 188(38)&nbsp;ns | IT | ¹⁸⁴W | (14+) | | |-id=Tungsten-185 | ¹⁸⁵W | style="text-align:right" | 74 | style="text-align:right" | 111 | 184.95342121(79) | 75.1(3)&nbsp;d | β^− | ¹⁸⁵Re | 3/2− | | |-id=Tungsten-185m | style="text-indent:1em" | ^185mW | colspan="3" style="text-indent:2em" | 197.383(23)&nbsp;keV | 1.597(4)&nbsp;min | IT | ¹⁸⁵W | 11/2+ | | |-id=Tungsten-186 | ¹⁸⁶W | style="text-align:right" | 74 | style="text-align:right" | 112 | 185.9543651(13) | colspan=3 align=center|Observationally Stable | 0+ | 0.2843(19) | |-id=Tungsten-186m1 | style="text-indent:1em" | ^186m1W | colspan="3" style="text-indent:2em" | 1517.2(6)&nbsp;keV | 18(1)&nbsp;μs | IT | ¹⁸⁶W | 7− | | |-id=Tungsten-186m2 | style="text-indent:1em" | ^186m2W | colspan="3" style="text-indent:2em" | 3542.8(21)&nbsp;keV | 2.0(2)&nbsp;s | IT | ¹⁸⁶W | 16+ | | |-id=Tungsten-187 | ¹⁸⁷W | style="text-align:right" | 74 | style="text-align:right" | 113 | 186.9571612(13) | 23.809(25)&nbsp;h | β^− | ¹⁸⁷Re | 3/2− | | |-id=Tungsten-187m | style="text-indent:1em" | ^187mW | colspan="3" style="text-indent:2em" | 410.06(4)&nbsp;keV | | IT | ¹⁸⁷W | 11/2+ | | |-id=Tungsten-188 | ¹⁸⁸W | style="text-align:right" | 74 | style="text-align:right" | 114 | 187.9584883(33) | 69.77(5)&nbsp;d | β^− | ¹⁸⁸Re | 0+ | | |-id=Tungsten-188m | style="text-indent:1em" | ^188mW | colspan="3" style="text-indent:2em" | 1926.7(8)&nbsp;keV | 109.5(35)&nbsp;ns | IT | ¹⁸⁸W | 8− | | |-id=Tungsten-189 | ¹⁸⁹W | style="text-align:right" | 74 | style="text-align:right" | 115 | 188.96156(22)# | 11.6(2)&nbsp;min | β^− | ¹⁸⁹Re | 9/2−# | | |-id=Tungsten-190 | ¹⁹⁰W | style="text-align:right" | 74 | style="text-align:right" | 116 | 189.963104(38) | 30.0(15)&nbsp;min | β^− | ¹⁹⁰Re | 0+ | | |-id=Tungsten-190m1 | style="text-indent:1em" | ^190m1W | colspan="3" style="text-indent:2em" | 1743.6(10)&nbsp;keV | 111(17)&nbsp;ns | IT | ¹⁹⁰W | 8+ | | |-id=Tungsten-190m2 | style="text-indent:1em" | ^190m2W | colspan="3" style="text-indent:2em" | 1840.6(14)&nbsp;keV | 166(6)&nbsp;μs | IT | ¹⁹⁰W | 10− | | |-id=Tungsten-191 | ¹⁹¹W | style="text-align:right" | 74 | style="text-align:right" | 117 | 190.966531(45) | 14#&nbsp;s<br />[>300&nbsp;ns] | | | 3/2−# | | |-id=Tungsten-191m | style="text-indent:1em" | ^191mW | colspan="3" style="text-indent:2em" | 235(10)#&nbsp;keV | 340(14)&nbsp;ns | IT | ¹⁹¹W | 9/2−# | | |-id=Tungsten-192 | ¹⁹²W | style="text-align:right" | 74 | style="text-align:right" | 118 | 191.96820(22)# | 40#&nbsp;s<br />[>300&nbsp;ns] | | | 0+ | | |-id=Tungsten-193 | ¹⁹³W | style="text-align:right" | 74 | style="text-align:right" | 119 | 192.97188(22)# | 30#&nbsp;s<br />[>300&nbsp;ns] | | | 1/2−# | | |-id=Tungsten-194 | ¹⁹⁴W | style="text-align:right" | 74 | style="text-align:right" | 120 | 193.97380(32)# | 20#&nbsp;s<br />[>300&nbsp;ns] | | | 0+ | | |-id=Tungsten-195 | ¹⁹⁵W | style="text-align:right" | 74 | style="text-align:right" | 121 | 194.97774(32)# | 30#&nbsp;s<br />[>160&nbsp;ns] | | | 3/2−# | | |-id=Tungsten-196 | ¹⁹⁶W | style="text-align:right" | 74 | style="text-align:right" | 122 | 195.97988(43)# | 25#&nbsp;s<br />[>300&nbsp;ns] | | | 0+ | | |-id=Tungsten-197 | ¹⁹⁷W | style="text-align:right" | 74 | style="text-align:right" | 123 | 196.98404(43)# | 1#&nbsp;s<br />[>300&nbsp;ns] | | | 5/2−# | |

See also

Daughter products other than tungsten

• Isotopes of rhenium
• Isotopes of tantalum
• Isotopes of hafnium

References