Talk:Isotopes of hafnium
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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 72 81 A |Hf-153 |400# ms [>200 ns] |1/2+# 72 81 B |Hf-153 |>60 ns | 72 81 A |Hf-153m |500# ms |11/2-# |750(100)# keV 72 82 AB |Hf-154 |2(1) s |0+ 72 82 C |Hf-154 |2. s | 72 83 A |Hf-155 |890(120) ms |7/2-# 72 83 BC |Hf-155 |0.89(12) s | 72 84 AB |Hf-156 |23(1) ms |0+ 72 84 C |Hf-156 |25. ms | 72 84 A |Hf-156m |480(40) µs |8+ |1959.0(10) keV 72 84 D |Hf-156m |0.52(1) ms |8+ |1959(1) keV 72 85 A |Hf-157 |115(1) ms |7/2- 72 85 B |Hf-157 |110(6) ms |7/2- 72 85 C |Hf-157 |0.11 s | 72 86 A |Hf-158 |2.84(7) s |0+ 72 86 BC |Hf-158 |2.85(7) s |0+ 72 87 A |Hf-159 |5.20(10) s |7/2-# 72 87 B |Hf-159 |5.6(4) s |7/2- 72 87 C |Hf-159 |5.6 s | 72 88 AB |Hf-160 |13.6(2) s |0+ 72 88 C |Hf-160 |~12. s |0+ 72 89 A |Hf-161 |18.2(5) s |3/2-# 72 89 B |Hf-161 |18.2(5) s | 72 89 C |Hf-161 |17. s | 72 90 AB |Hf-162 |39.4(9) s |0+ 72 90 C |Hf-162 |38. s |0+ 72 91 A |Hf-163 |40.0(6) s |3/2-# 72 91 BC |Hf-163 |40.0(6) s | 72 92 AB |Hf-164 |111(8) s |0+ 72 92 C |Hf-164 |2.8 min | 72 93 AB |Hf-165 |76(4) s |(5/2-) 72 93 C |Hf-165 |1.32 min |11/2- 72 94 AB |Hf-166 |6.77(30) min |0+ 72 94 C |Hf-166 |6.8 min | 72 95 AB |Hf-167 |2.05(5) min |(5/2)- 72 95 C |Hf-167 |2.0 min |(5/2-) 72 96 AB |Hf-168 |25.95(20) min |0+ 72 96 C |Hf-168 |25.9 min |0+ 72 97 AB |Hf-169 |3.24(4) min |(5/2)- 72 97 C |Hf-169 |3.25 min |(5/2-) 72 98 ABC |Hf-170 |16.01(13) h |0+ 72 99 AB |Hf-171 |12.1(4) h |7/2(+) 72 99 C |Hf-171 |12.2 h |7/2+ 72 99 AE |Hf-171m |29.5(9) s |1/2(-) |21.93(9) keV 72 99 C |Hf-171m |30. s |(1/2-) 72 100 ABC |Hf-172 |1.87(3) a |0+ 72 100 AD |Hf-172m |163(3) ns |(8-) |2005.58(11) keV 72 101 ABC |Hf-173 |23.6(1) h |1/2- 72 102 ABC |Hf-174 |2.0(4)E+15 a |0+ 72 102 D |Hf-174m1|138(4) ns |(6+) |1549.3 keV 72 102 A |Hf-174m2|2.39(4) µs |(8-) |1797.5(20) keV 72 102 D |Hf-174m3|2.39(4) µs |(8-) |1797.5 keV 72 102 D |Hf-174m4|3.7(2) µs |(14+) |3311.7 keV 72 103 A |Hf-175 |70(2) d |5/2- 72 103 B |Hf-175 |70(2) d |5/2(-) 72 103 C |Hf-175 |71. d |5/2- 72 104 ABC |Hf-176 |STABLE |0+ 72 105 ABC |Hf-177 |STABLE |7/2- 72 105 AE |Hf-177m1|1.09(5) s |23/2+ |1315.4504(8) keV 72 105 C |Hf-177m1|1.1 s |23/2+ 72 105 AD |Hf-177m2|55.9(12) µs |(19/2-) |1342.38(20) keV 72 105 AE |Hf-177m3|51.4(5) min |37/2- |2740.02(15) keV 72 105 C |Hf-177m3|51.4 min |37/2- 72 106 ABC |Hf-178 |STABLE |0+ 72 106 AE |Hf-178m1|4.0(2) s |8- |1147.423(5) keV 72 106 C |Hf-178m1|4.0 s |8- 72 106 A |Hf-178m2|68(2) µs |(14-) |2573.5(5) keV 72 106 D |Hf-178m2|68(2) µs |(14)- |2573.5 keV 72 106 A |Hf-178m3|31(1) a |16+ |2445.69(11) keV 72 106 E |Hf-178m3|31(1) a |16+ |2446.05(15) keV 72 106 C |Hf-178m3|31. a |16+ 72 107 ABC |Hf-179 |STABLE |9/2+ 72 107 AE |Hf-179m1|18.67(4) s |1/2- |375.0367(25) keV 72 107 C |Hf-179m1|18.7 s |1/2- 72 107 AE |Hf-179m2|25.05(25) d |25/2- |1105.84(19) keV 72 107 C |Hf-179m2|25.1 d |25/2- 72 108 ABC |Hf-180 |STABLE |0+ 72 108 A |Hf-180m1|5.5(1) h |8- |1141.48(4) keV 72 108 E |Hf-180m1|5.47(4) h |8- |1141.50(5) keV 72 108 C |Hf-180m1|5.52 h |8- 72 108 D |Hf-180m2|0.57(2) µs |(4-) |1374.15(4) keV 72 108 D |Hf-180m3|15(5) µs |(10+) |2425.8(10) keV 72 108 D |Hf-180m4|10(1) µs |12+ |2486.3(9) keV 72 108 D |Hf-180m5|>10 µs |(14+) |2538.3(12) keV 72 108 D |Hf-180m6|90(10) µs |(18-) |3599.3(18) keV 72 109 ABC |Hf-181 |42.39(6) d |1/2- 72 109 A |Hf-181m1|80(5) µs |(9/2+) |595(3) keV 72 109 A |Hf-181m2|~100 µs |(17/2+) |1040(10) keV 72 109 A |Hf-181m3|1.5(5) ms |(27/2-) |1738(10) keV 72 109 C |Hf-181m3|1.5 ms |25/2- 72 110 A |Hf-182 |9(2)E+6 a |0+ 72 110 B |Hf-182 |8.90(9)E+6 a |0+ 72 110 C |Hf-182 |9.E+6 a |0+ 72 110 AE |Hf-182m |61.5(15) min |8- |1172.88(18) keV 72 110 C |Hf-182m |62. min |8- 72 111 AB |Hf-183 |1.067(17) h |(3/2-) 72 111 C |Hf-183 |1.07 h |3/2- 72 112 ABC |Hf-184 |4.12(5) h |0+ 72 112 A |Hf-184m |48(10) s |8- |1272.4(4) keV 72 112 B |Hf-184m |48(10) s |8- |1.2724 MeV 72 113 A |Hf-185 |3.5(6) min |3/2-# 72 113 B |Hf-185 |3.5(6) min | 72 113 C |Hf-185 |~3.5 min | 72 114 AB |Hf-186 |2.6(12) min |0+ 72 114 C |Hf-186 |~2.6 min | 72 115 A |Hf-187 |30# s [>300 ns] | 72 115 B |Hf-187 |30# s | 72 116 A |Hf-188 |20# s [>300 ns] |0+ 72 116 B |Hf-188 |20# s |0+
Femto 12:54, 16 November 2005 (UTC)
Talk
Hey, isn't one of the isomers of Hf-174 listed twice? Stonemason89 (talk) 15:37, 9 December 2009 (UTC)
I'm a little bit confused on the notation here. In other articles on Wikipedia, ie Nuclear isomer, the notation is that the first excited state is denoted with an 'm' after the atomic mass number. The second (if one exists) is denoted m2, and so on. Yet here the notation is: m, m1, m2, ..., so my understanding is that with the existence of multiple metastable nuclear isomers, there is no 'm1', which is just the first state and denoted simply as 'm'; then 'm2', 'm3', and so on. So what's the deal? Who's right? — Preceding unsigned comment added by Cthunter01 (talk • contribs) 00:36, 15 December 2010 (UTC)
Edit: Wait, no I was slightly mistaken. But my original problem had to do with references to 178m2-Hf having a half-life of 31 yrs in the Nuclear isomer article, but in this article that same isomer is listed as 178m3-Hf? Cthunter01 (talk) 00:42, 15 December 2010 (UTC)
Redudant note for Hf-182
I'm new at this editing thing so I'll just point it out in this talk page since I don't see why Hf-182 has a tag of potentially appearing in trace amounts. First of all, it isn't the only isotope that it's a theoretical decay product. Second, W-186 has a predicted alpha half life in excess of 1E50 years, much greater than its double decay half life or the half life of Hf-182. There's no way any detectable quantity of this isotope would be the result of this alpha decay. It's pretty useless to consider an occurence of less than a single atom on Earth as a trace. Crackhorace 10:42, 17 November 2016 (UTC)
— Preceding unsigned comment added by Crackhorace (talk • contribs) 10:43, 17 November 2016 (UTC)