钨的同位素
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标准原子质量 (Ar, 标准) |
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钨(原子量:183.84(1))共有46个同位素,其中有5种在自然界出现,当中180
W
具有极长的半衰期,其他4种理论上具有放射性但是迄今为止尚未观测到。
图表[编辑]
符号 | Z( p ) |
N( n ) |
同位素质量(u) | 半衰期[n 1] | 衰变 方式[2][n 2] |
衰变 产物[n 3] |
原子核 自旋 |
相对丰度 (莫耳分率) |
相对丰度 (莫耳分率) |
---|---|---|---|---|---|---|---|---|---|
激发能量 | |||||||||
158W | 74 | 84 | 157.97456(54)# | 1.37(17) ms | α | 154Hf | 0+ | ||
158mW | 1889(8) keV | 143(19) µs | 8+ | ||||||
159W | 74 | 85 | 158.97292(43)# | 8.2(7) ms | α (82%) | 155Hf | 7/2−# | ||
β+ (18%) | 159Ta | ||||||||
160W | 74 | 86 | 159.96848(22) | 90(5) ms | α (87%) | 156Hf | 0+ | ||
β+ (14%) | 160Ta | ||||||||
161W | 74 | 87 | 160.96736(21)# | 409(16) ms | α (73%) | 157Hf | 7/2−# | ||
β+ (23%) | 161Ta | ||||||||
162W | 74 | 88 | 161.963497(19) | 1.36(7) s | β+ (53%) | 162Ta | 0+ | ||
α (47%) | 158Hf | ||||||||
163W | 74 | 89 | 162.96252(6) | 2.8(2) s | β+ (59%) | 163Ta | 3/2−# | ||
α (41%) | 159Hf | ||||||||
164W | 74 | 90 | 163.958954(13) | 6.3(2) s | β+ (97.4%) | 164Ta | 0+ | ||
α (2.6%) | 160Hf | ||||||||
165W | 74 | 91 | 164.958280(27) | 5.1(5) s | β+ (99.8%) | 165Ta | 3/2−# | ||
α (.2%) | 161Hf | ||||||||
166W | 74 | 92 | 165.955027(11) | 19.2(6) s | β+ (99.96%) | 166Ta | 0+ | ||
α (.035%) | 162Hf | ||||||||
167W | 74 | 93 | 166.954816(21) | 19.9(5) s | β+ (>99.9%) | 167Ta | 3/2−# | ||
α (<.1%) | 163Hf | ||||||||
168W | 74 | 94 | 167.951808(17) | 51(2) s | β+ (99.99%) | 168Ta | 0+ | ||
α (.0319%) | 164Hf | ||||||||
169W | 74 | 95 | 168.951779(17) | 76(6) s | β+ | 169Ta | (5/2−) | ||
170W | 74 | 96 | 169.949228(16) | 2.42(4) min | β+(99%) | 170Ta | 0+ | ||
α (1%) | 166Hf | ||||||||
171W | 74 | 97 | 170.94945(3) | 2.38(4) min | β+ | 171Ta | (5/2−) | ||
172W | 74 | 98 | 171.94729(3) | 6.6(9) min | β+ | 172Ta | 0+ | ||
173W | 74 | 99 | 172.94769(3) | 7.6(2) min | β+ | 173Ta | 5/2− | ||
174W | 74 | 100 | 173.94608(3) | 33.2(21) min | β+ | 174Ta | 0+ | ||
175W | 74 | 101 | 174.94672(3) | 35.2(6) min | β+ | 175Ta | (1/2−) | ||
176W | 74 | 102 | 175.94563(3) | 2.5(1) h | ε | 176Ta | 0+ | ||
177W | 74 | 103 | 176.94664(3) | 132(2) min | β+ | 177Ta | 1/2− | ||
178W | 74 | 104 | 177.945876(16) | 21.6(3) d | ε | 178Ta | 0+ | ||
179W | 74 | 105 | 178.947070(17) | 37.05(16) min | β+ | 179Ta | (7/2)− | ||
179m1W | 221.926(8) keV | 6.40(7) min | IT (99.72%) | 179W | (1/2)− | ||||
β+ (.28%) | 179Ta | ||||||||
179m2W | 1631.90(8) keV | 390(30) ns | (21/2+) | ||||||
179m3W | 3348.45(16) keV | 750(80) ns | (35/2−) | ||||||
180W[n 4] | 74 | 106 | 179.946704(4) | 1.8(0.2)×1018 y | α | 176Hf | 0+ | 0.0012(1) | |
180m1W | 1529.04(3) keV | 5.47(9) ms | IT | 180W | 8− | ||||
180m2W | 3264.56(21) keV | 2.33(19) µs | 14− | ||||||
181W | 74 | 107 | 180.948197(5) | 121.2(2) d | ε | 181Ta | 9/2+ | ||
182W | 74 | 108 | 181.9482042(9) | 观测上稳定 [n 5] | 0+ | 0.2650(16) | |||
183W | 74 | 109 | 182.9502230(9) | 观测上稳定 [n 6] | 1/2− | 0.1431(4) | |||
183mW | 309.493(3) keV | 5.2(3) s | IT | 183W | 11/2+ | ||||
184W | 74 | 110 | 183.9509312(9) | 观测上稳定 [n 7] | 0+ | 0.3064(2) | |||
185W | 74 | 111 | 184.9534193(10) | 75.1(3) d | β− | 185Re | 3/2− | ||
185mW | 197.43(5) keV | 1.597(4) min | IT | 185W | 11/2+ | ||||
186W | 74 | 112 | 185.9543641(19) | 观测上稳定 [n 8] | 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 | β− | 187Re | 3/2− | ||
188W | 74 | 114 | 187.958489(4) | 69.78(5) d | β− | 188Re | 0+ | ||
189W | 74 | 115 | 188.96191(21) | 11.6(3) min | β− | 189Re | (3/2−) | ||
190W | 74 | 116 | 189.96318(18) | 30.0(15) min | β− | 190Re | 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+ |
备注:画上#号的数据代表没有经过实验的证明,只是理论推测而已,而用括号括起来的代表数据不确定性。
← | 同位素列表 | → |
钽的同位素 | 钨的同位素 | 铼的同位素 |
注释[编辑]
- ^ Bold for isotopes with half-lives longer than the age of the universe (nearly stable)
- ^ Abbreviations:
ε: Electron capture
IT: Isomeric transition - ^ Bold for stable isotopes
- ^ Primordial radionuclide
- ^ Believed to undergo α decay to 178Hf with a half-life over 1.70×1020 y
- ^ Believed to undergo α decay to 179Hf with a half-life over 8.0×1019 y
- ^ Believed to undergo α decay to 180Hf with a half-life over 1.80×1020 y
- ^ Believed to undergo α decay to 182Hf with a half-life over 4.1×1018 y
参考文献[编辑]
- ^ Meija, Juris; et al. Atomic weights of the elements 2013 (IUPAC Technical Report). Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- ^ Universal Nuclide Chart. nucleonica. [2015-10-06]. (原始内容存档于2017-02-19).
- 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) (页面存档备份,存于互联网档案馆). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) (页面存档备份,存于互联网档案馆).
- 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 (页面存档备份,存于互联网档案馆), Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (页面存档备份,存于互联网档案馆) (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.
元素与同位素的稳定度 | |||||||||||||||||||||||||||||||||
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