Talk:Isotopes of tungsten

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This article is part of Wikipedia:Wikiproject Isotopes. Please keep style and phrasings consistent across the set of pages. For later reference and improved reliability, data from all considered multiple sources is collected here. References are denoted by these letters:

  • (A) G. Audi, O. Bersillon, J. Blachot, A.H. Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003). — Where this source indicates a speculative value, the # mark is also applied to values with weak assignment arguments from other sources, if grouped together. An asterisk after the A means that a comment of some importance may be available in the original.
  • (B) National Nuclear Data Center, Brookhaven National Laboratory, information extracted from the NuDat 2.1 database. (Retrieved Sept. 2005, from the code of the popup boxes).
  • (C) 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. — The CRC uses rounded numbers with implied uncertainties, where this concurs with the range of another source it is treated as exactly equal in this comparison.
  • (D) More specific level data from reference B's Levels and Gammas database.
  • (E) Same as B but excitation energy replaced with that from D.
  Z   N refs symbol   half-life                   spin              excitation energy
 74  84 A   |W-158   |1.37(17) ms                |0+
 74  84 B   |W-158   |1.25(21) ms                |0+
 74  84 C   |W-158   |1.3 ms                     |
 74  84 A   |W-158m  |143(19) µs                 |8+               |1889(8) keV
 74  84 D   |W-158m  |0.143(19) ms               |(8+)             |1888(8) keV
 74  84 C   |W-158m  |0.14 ms                    |
 74  85 A   |W-159   |8.2(7) ms                  |7/2-#
 74  85 BC  |W-159   |7.3(27) ms                 |
 74  86 A   |W-160   |90(5) ms                   |0+
 74  86 B   |W-160   |91(5) ms                   |0+
 74  86 C   |W-160   |0.08 s                     |0+
 74  87 A   |W-161   |409(16) ms                 |7/2-#
 74  87 BC  |W-161   |409(18) ms                 |
 74  88 AB  |W-162   |1.36(7) s                  |0+
 74  88 C   |W-162   |1.39 s                     |0+
 74  89 A   |W-163   |2.8(2) s                   |3/2-#
 74  89 BC  |W-163   |2.8(2) s                   |
 74  90 ABC |W-164   |6.3(2) s                   |0+
 74  91 A   |W-165   |5.1(5) s                   |3/2-#
 74  91 B   |W-165   |5.1(5) s                   |(5/2-)
 74  91 C   |W-165   |5.1 s                      |
 74  92 AB  |W-166   |19.2(6) s                  |0+
 74  92 C   |W-166   |16. s                      |0+
 74  93 A   |W-167   |19.9(5) s                  |3/2-#
 74  93 B   |W-167   |19.9(5) s                  |(+)
 74  93 C   |W-167   |20. s                      |
 74  94 A   |W-168   |51(2) s                    |0+
 74  94 B   |W-168   |53(2) s                    |0+
 74  94 C   |W-168   |53. s                      |
 74  95 A   |W-169   |76(6) s                    |(5/2-)
 74  95 B   |W-169   |74(6) s                    |(5/2-)
 74  95 C   |W-169   |1.3 min                    |
 74  96 AB  |W-170   |2.42(4) min                |0+
 74  96 C   |W-170   |2.4 min                    |
 74  97 AB  |W-171   |2.38(4) min                |(5/2-)
 74  97 C   |W-171   |2.4 min                    |
 74  98 AB  |W-172   |6.6(9) min                 |0+
 74  98 C   |W-172   |6.6 min                    |
 74  99 AB  |W-173   |7.6(2) min                 |5/2-
 74  99 C   |W-173   |6.3 min                    |
 74 100 AB  |W-174   |33.2(21) min               |0+
 74 100 C   |W-174   |35. min                    |0+
 74 101 AB  |W-175   |35.2(6) min                |(1/2-)
 74 101 C   |W-175   |35. min                    |1/2-
 74 102 ABC |W-176   |2.5(1) h                   |0+
 74 103 AB  |W-177   |132(2) min                 |1/2-
 74 103 C   |W-177   |2.21 h                     |(1/2-)
 74 104 ABC |W-178   |21.6(3) d                  |0+
 74 105 AB  |W-179   |37.05(16) min              |(7/2)-
 74 105 C   |W-179   |38. min                    |(7/2-)
 74 105 AE  |W-179m1 |6.40(7) min                |(1/2)-           |221.926(8) keV
 74 105 C   |W-179m1 |6.4 min                    |(1/2-)
 74 105 D   |W-179m2 |390(30) ns                 |(21/2+)          |1631.90(8) keV
 74 105 D   |W-179m3 |750(80) ns                 |(35/2-)          |3348.45(16) keV
 74 106 A*  |W-180   |1.8±0.2 E+18 a             |0+
 74 106 B   |W-180   |1.8(2)E+18 a               |0+
 74 106 D   |W-180   |1.1E+17(+8-4) a            |0+
 74 106 C   |W-180   |7.4E+16 a                  |0+
 74 106 A   |W-180m1 |5.47(9) ms                 |8-               |1529.04(3) keV
 74 106 D   |W-180m1 |5.47(9) ms                 |8-               |1529.01(3) keV
 74 106 D   |W-180m2 |2.33(19) µs                |14-              |3264.56(21) keV
 74 107 ABC |W-181   |121.2(2) d                 |9/2+
 74 108 A   |W-182   |STABLE [>170E+18 a]        |0+
 74 108 B   |W-182   |>8.3E+18 a                 |0+
 74 108 C   |W-182   |8.3E+18 a                  |0+
 74 109 A   |W-183   |STABLE [>80E+18 a]         |1/2-
 74 109 B   |W-183   |>1.3E+19 a                 |1/2-
 74 109 D   |W-183   |>1.1E+17 a                 |1/2-
 74 109 C   |W-183   |1.9E+18 a                  |1/2-
 74 109 AE  |W-183m  |5.2(3) s                   |11/2+            |309.493(3) keV
 74 109 C   |W-183m  |5.15 s                     |(11/2+)
 74 110 A   |W-184   |STABLE [>180E+18 a]        |0+
 74 110 B   |W-184   |>2.9E+19 a                 |0+
 74 110 C   |W-184   |4.0E+18 a                  |0+
 74 111 AB  |W-185   |75.1(3) d                  |3/2-
 74 111 C   |W-185   |74.8 d                     |3/2-
 74 111 A   |W-185m  |1.597(4) min               |11/2+            |197.43(5) keV
 74 111 E   |W-185m  |1.67(3) min                |11/2+            |197.43(5) keV
 74 111 C   |W-185m  |1.6 min                    |11/2+
 74 112 A   |W-186   |STABLE [>4.1E+18 a]        |0+
 74 112 B   |W-186   |>2.7E+19 a                 |0+
 74 112 C   |W-186   |6.5E+18 a                  |0+
 74 112 AD  |W-186m1 |18(1) µs                   |(7-)             |1517.2(6) keV
 74 112 AD  |W-186m2 |>3 ms                      |(16+)            |3542.8(21) keV
 74 113 AB  |W-187   |23.72(6) h                 |3/2-
 74 113 C   |W-187   |23.9 h                     |3/2-
 74 114 ABC |W-188   |69.78(5) d                 |0+
 74 115 A   |W-189   |11.6(3) min                |(3/2-)
 74 115 B   |W-189   |10.7(5) min                |(3/2-)
 74 115 C   |W-189   |10.6 min                   |(3/2-)
 74 116 ABC |W-190   |30.0(15) min               |0+
 74 116 A   |W-190m  |<3.1 ms                    |(10-)            |2381(5) keV
 74 116 D   |W-190m  |<=3.1 ms                   |(10-)            |2381 keV
 74 116 C   |W-190m  |0.3 ms                     |
 74 117 A   |W-191   |20# s [>300 ns]            |3/2-#
 74 117 B   |W-191   |>300 ns                    |
 74 118 A   |W-192   |10# s [>300 ns]            |0+
 74 118 B   |W-192   |>300 ns                    |0+

Femto 12:59, 16 November 2005 (UTC)

Talk[edit]


74W Tungsten stability consideration[edit]

Tungsten is the 4th element of the post lanthinide series, and whose stable isotopes straddle the major trend line in that area which is A = 3Z - 38, and which passes through EE74W184 which has 36 extra neutrons. The least stable of the reported 5 stable isotopes is EE74W180 with only 32 extra neutrons; but all the so called stable isotopes have halflife times exceeding the lifetime of the universe. 4 of the 5 reported stable isotopes are EE's, with only the central isotope EO74W183 being an EO isotope. The stability trend line in this area is pretty narrowly defined, and passes through 73Ta with practically 100% constituency as OE73Ta181 and through the Rhenium isotope OE75Re187 with 62% constituency. The other thing interesting to note in this area is that the 75Re Rhenium isotope OO75Re186 isotope with the same number of extra neutrons (36) is an unstable B- emitter with an unusual short 3.7day halflife, and which changes it to EE76Os186, away from the 74 Tungsten series.WFPM (talk) 20:19, 1 September 2009 (UTC)

TUNGSTEN IS NOT RADIOACTIVE![edit]

Natural tungsten has been proven to be 100% stable. Hold it up to a Geiger counter, it registers nothing. Occurs plentifully in nature, Z < 83, so it must be stable. This article needs to be fixed. —Preceding unsigned comment added by 75.104.128.54 (talk) 18:34, 19 August 2010 (UTC)

Elements 43 and 61 are unstable. Moreover, a Geiger counter is not very sensitive. If you hold bismuth (Z=83) up to a Geiger counter you won't get anything, either. Or with indium, where the most common isotope is the radioactive one. The problem is that "stability" is a relative term. All elements with Z > 40 are theoretically unstable to spontaneous fission, or cluster decay with emission of C-12 or something of that sort, but the calculated half-lives are too long for this to be seen, with many of them. In other cases, the decay has been seen but the half-life is unknown. See list of nuclides for discussion of the problem. SBHarris 22:30, 19 August 2010 (UTC)

Half-life of EO74W179 Tungsten[edit]

74W tungsten has 5 stable or almost stable consisting of the 4 EE isotopes 180, 182, 184, and 186, which are grouped around the also stable isotope EO74W183. However the stability profile of 74W tungsten is made irregular by the reported half-lifetime value of EO74W197 of only 38 minutes (log second =3.36). This is below the comparable half-lifes of the adjacent isotopes EO74W177 (2.21 hours) and EO74181 (121 days) and thus distorts the EO stability isotope profile of 74W tungsten.WFPM (talk) 05:26, 30 April 2013 (UTC)