Talk:Isotopes of gadolinium

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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
 64  70 AB  |Gd-134  |0.4# s                     |0+
 64  71 A   |Gd-135  |1.1(2) s                   |3/2-
 64  71 BC  |Gd-135  |1.1(2) s                   |
 64  72 A   |Gd-136  |1# s [>200 ns]             |
 64  72 B   |Gd-136  |>=200 ns                   |0+
 64  73 A   |Gd-137  |2.2(2) s                   |7/2+#
 64  73 B   |Gd-137  |2.2(2) s                   |(7/2)
 64  73 C   |Gd-137  |7. s                       |
 64  74 AB  |Gd-138  |4.7(9) s                   |0+
 64  74 C   |Gd-138  |~4.7 s                     |
 64  74 AD  |Gd-138m |6(1) µs                    |(8-)             |2232.7(11) keV
 64  75 A   |Gd-139  |5.7(3) s                   |9/2-#
 64  75 B   |Gd-139  |5.8(9) s                   |(9/2-)
 64  75 C   |Gd-139  |5. s                       |
 64  75 A   |Gd-139m |4.8(9) s                   |1/2+#            |250(150)# keV
 64  75 E   |Gd-139m |4.8(9) s                   |                 |X keV
 64  75 C   |Gd-139m |~4.8 s                     |
 64  76 ABC |Gd-140  |15.8(4) s                  |0+
 64  77 A   |Gd-141  |14(4) s                    |(1/2+)
 64  77 B   |Gd-141  |14(4) s                    |1/2+
 64  77 C   |Gd-141  |21. s                      |0+
 64  77 A   |Gd-141m |24.5(5) s                  |(11/2-)          |377.8(2) keV
 64  77 E   |Gd-141m |24.5(5) s                  |11/2-            |377.8(2) keV
 64  77 C   |Gd-141m |25. s                      |11/2-
 64  78 AB  |Gd-142  |70.2(6) s                  |0+
 64  78 C   |Gd-142  |1.17 min                   |1/2+
 64  79 AB  |Gd-143  |39(2) s                    |(1/2)+
 64  79 C   |Gd-143  |39. s                      |1/2+
 64  79 AE  |Gd-143m |110.0(14) s                |(11/2-)          |152.6(5) keV
 64  79 C   |Gd-143m |1.84 min                   |11/2-
 64  80 ABC |Gd-144  |4.47(6) min                |0+
 64  81 AB  |Gd-145  |23.0(4) min                |1/2+
 64  81 C   |Gd-145  |23.4 min                   |1/2+
 64  81 AE  |Gd-145m |85(3) s                    |11/2-            |749.1(2) keV
 64  81 C   |Gd-145m |1.44 min                   |11/2-
 64  82 ABC |Gd-146  |48.27(10) d                |0+
 64  83 AB  |Gd-147  |38.06(12) h                |7/2-
 64  83 C   |Gd-147  |1.588 d                    |7/2-
 64  83 AD  |Gd-147m |510(20) ns                 |(49/2+)          |8587.8(4) keV
 64  84 AC  |Gd-148  |74.6(30) a                 |0+
 64  84 B   |Gd-148  |70.9(10) a                 |0+
 64  85 ABC |Gd-149  |9.28(10) d                 |7/2-
 64  86 ABC |Gd-150  |1.79(8)E+6 a               |0+
 64  87 ABC |Gd-151  |124(1) d                   |7/2-
 64  88 AB  |Gd-152  |1.08(8)E+14 a              |0+
 64  88 C   |Gd-152  |STABLE                     |0+
 64  89 ABC |Gd-153  |240.4(10) d                |3/2-
 64  89 AD  |Gd-153m1|3.5(4) µs                  |(9/2+)           |95.1737(12) keV
 64  89 AD  |Gd-153m2|76.0(14) µs                |(11/2-)          |171.189(5) keV
 64  90 ABC |Gd-154  |STABLE                     |0+
 64  91 ABC |Gd-155  |STABLE                     |3/2-
 64  91 A   |Gd-155m |32.0(3) ms                 |11/2-            |121.05(19) keV
 64  91 D   |Gd-155m |31.97(27) ms               |11/2-            |121.05(19) keV
 64  92 ABC |Gd-156  |STABLE                     |0+
 64  92 AD  |Gd-156m |1.3(1) µs                  |7-               |2137.60(5) keV
 64  93 ABC |Gd-157  |STABLE                     |3/2-
 64  94 ABC |Gd-158  |STABLE                     |0+
 64  95 AB  |Gd-159  |18.479(4) h                |3/2-
 64  95 C   |Gd-159  |18.6 h                     |3/2-
 64  96 A   |Gd-160  |STABLE [>31E+18 a]         |0+
 64  96 B   |Gd-160  |>3.1E+19 a                 |0+
 64  96 C   |Gd-160  |>1.9E+19 a                 |0+
 64  97 A   |Gd-161  |3.646(3) min               |5/2-
 64  97 BC  |Gd-161  |3.66(5) min                |5/2-
 64  98 ABC |Gd-162  |8.4(2) min                 |0+
 64  99 A   |Gd-163  |68(3) s                    |7/2+#
 64  99 B   |Gd-163  |68(3) s                    |(5/2-,7/2+)
 64  99 C   |Gd-163  |1.13 min                   |
 64 100 AB  |Gd-164  |45(3) s                    |0+
 64 100 C   |Gd-164  |45. s                      |
 64 101 A   |Gd-165  |10.3(16) s                 |1/2-#
 64 101 BC  |Gd-165  |10.3(16) s                 |
 64 102 A   |Gd-166  |4.8(10) s                  |0+
 64 102 B   |Gd-166  |~7 s                       |0+
 64 103 A   |Gd-167  |3# s                       |5/2-#
 64 103 B   |Gd-167  |~3 s                       |
 64 104 A   |Gd-168  |300# ms                    |0+
 64 104 B   |Gd-168  |~0.3 s                     |0+
 64 105 A   |Gd-169  |1# s                       |7/2-#
 64 105 B   |Gd-169  |~1 s                       |

Femto 12:37, 15 November 2005 (UTC)

Talk[edit]


This does not conform to other "isotopes of" pages. Important info missing.[edit]

Does not note signoficant isotopes as do most other "Isotopes of" pages". Gadolinium notes specific nuclear/isotopic properties that should be here because they are properties on indivisual isotopes and not of Gadolinium as a whole. The (NMR) nuclear resonance characteristics are unique to some isotopes. I came here to look for the energy of gamma emitted after neutron absorption of Gd-157 (still used for cancer patient targeted radiation treatment although being supplanted by Boron-10). From Gadolinium "Gadolinium has the highest neutron cross-section among any stable nuclides: 61,000 barns for 155Gd and 259,000 barns for 157Gd. 157Gd has been used to target tumors in neutron therapy. This element is very effective for use with neutron radiography and in shielding of nuclear reactors. It is used as a secondary, emergency shut-down measure in some nuclear reactors, particularly of the CANDU type.[1] Gadolinium is also used in nuclear marine propulsion systems as a burnable poison." I was also miffed that meta 158Gd was not noted as it would be the intermediate after 157Gd neutron absorption. Shjacks45 (talk) 03:38, 21 February 2014 (UTC)

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