This is an archive of past discussions about Isotopes of lanthanum. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page.
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
57 60 AB |La-117 |23.5(26) ms |(3/2+,3/2-)
57 60 C |La-117 |23 ms |3/2+
57 60 A |La-117m |10(5) ms |(9/2+) |138(15) keV
57 60 E |La-117m |10(5) ms |(9/2+) |151(12) keV
57 61 A |La-118 |200# ms |
57 61 B |La-118 |~1 s |
57 62 A |La-119 |1# s |11/2-#
57 62 B |La-119 |~2 s |
57 63 ABC |La-120 |2.8(2) s |
57 64 A |La-121 |5.3(2) s |11/2-#
57 64 BC |La-121 |5.3(2) s |
57 65 AC |La-122 |8.7(7) s |
57 65 B |La-122 |8.6(5) s |
57 66 A |La-123 |17(3) s |11/2-#
57 66 BC |La-123 |17(3) s |
57 67 A |La-124 |29.21(17) s |(7-,8-)
57 67 B |La-124 |<1 s |low
57 67 C |La-124 |30. s |(7+)
57 67 A |La-124m |21(4) s |low(+#) |100(100)# keV
57 67 E |La-124m |29(1) s |(7,8-) |0+X keV
57 67 D |La-124m |<1 s | |0+Y keV
57 68 A* |La-125 |64.8(12) s |(11/2-)
57 68 B |La-125 |64.8(12) s |
57 68 C |La-125 |1.2 min |11/2-
57 68 A |La-125m |390(40) ms |(3/2+) |107.0(1) keV
57 68 E |La-125m |0.4(2) s | |107.0(10) keV
57 68 C |La-125m |0.39 s |
57 69 A |La-126 |54(2) s |(5)(+#)
57 69 B |La-126 |<50 s |(0-,1,2-)
57 69 C |La-126 |54. s |
57 69 A |La-126m |20(20) s |(0-,1-,2-) |210(410) keV
57 69 E |La-126m |54(2) s |(5+) |0+X keV
57 69 D |La-126m |<50 s |(0-,1,2-) |0+Z keV
57 69 C |La-126m |<50. s |
57 70 AB |La-127 |5.1(1) min |(11/2-)
57 70 C |La-127 |3.8 min |3/2+
57 70 AE |La-127m |3.7(4) min |(3/2+) |14.8(12) keV
57 71 AB |La-128 |5.18(14) min |(5+)
57 71 C |La-128 |5.0 min |(5-)
57 71 A |La-128m |<1.4 min |(1+,2-) |100(100)# keV
57 71 E |La-128m |<1.4 min |(1+,2-) |0+X keV
57 72 ABC |La-129 |11.6(2) min |3/2+
57 72 AE |La-129m |560(50) ms |11/2- |172.1(4) keV
57 72 C |La-129m |0.56 s |(11/2-)
57 73 AB |La-130 |8.7(1) min |3(+)
57 73 C |La-130 |8.7 min |3+
57 74 ABC |La-131 |59(2) min |3/2+
57 74 AD |La-131m |170(10) µs |11/2- |304.52(24) keV
57 75 ABC |La-132 |4.8(2) h |2-
57 75 A |La-132m |24.3(5) min |6- |188.18(11) keV
57 75 E |La-132m |24.3(5) min |6- |188.20(11) keV
57 75 C |La-132m |24. min |6-
57 76 ABC |La-133 |3.912(8) h |5/2+
57 77 ABC |La-134 |6.45(16) min |1+
57 78 ABC |La-135 |19.5(2) h |5/2+
57 79 ABC |La-136 |9.87(3) min |1+
57 79 A |La-136m |114(3) ms |(8)(-#) |255(9) keV
57 79 E |La-136m |114(3) ms |(8+) |230+X keV
57 80 ABC |La-137 |6(2)E+4 a |7/2+
57 81 AB |La-138 |1.02(1)E+11 a |5+
57 81 C |La-138 |1.06E+11 a |5+
57 81 AD |La-138m |116(5) ns |(3)+ |72.57(3) keV
57 82 ABC |La-139 |STABLE |7/2+
57 83 ABC |La-140 |1.6781(3) d |3-
57 84 AB |La-141 |3.92(3) h |(7/2+)
57 84 C |La-141 |3.90 h |7/2+
57 85 AB |La-142 |91.1(5) min |2-
57 85 C |La-142 |1.54 h |2-
57 86 AB |La-143 |14.2(1) min |(7/2)+
57 86 C |La-143 |14.1 min |7/2-
57 87 AB |La-144 |40.8(4) s |(3-)
57 87 C |La-144 |40.7 s |
57 88 AB |La-145 |24.8(20) s |(5/2+)
57 88 C |La-145 |24. s |3/2+
57 89 AB |La-146 |6.27(10) s |2-
57 89 C |La-146 |6.3 s |(2-)
57 89 A |La-146m |10.0(1) s |(6-) |130(130) keV
57 89 E |La-146m |10.0(1) s |(6-) |X keV
57 89 C |La-146m |10.0 s |(6)
57 90 AB |La-147 |4.015(8) s |(5/2+)
57 90 C |La-147 |4.02 s |
57 91 AB |La-148 |1.26(8) s |(2-)
57 91 C |La-148 |1.1 s |2-
57 92 A |La-149 |1.05(3) s |5/2+#
57 92 B |La-149 |1.05(3) s |(3/2,5/2)
57 92 C |La-149 |1.10 s |
57 93 A |La-150 |510(30) ms |(3+)
57 93 B |La-150 |0.51(3) s |(3-)
57 93 C |La-150 |0.51 s |
57 94 A |La-151 |300# ms [>300 ns] |5/2+#
57 94 BC |La-151 |>150 ns |
57 95 A |La-152 |200# ms [>300 ns] |
57 95 BC |La-152 |>150 ns |
57 96 A |La-153 |150# ms [>300 ns] |5/2+#
57 96 B |La-153 |>100 ns |
57 96 C |La-153 |>0.15 µs |
57 97 A |La-154 |100# ms |
57 97 B |La-154 |~0.1 s |
57 98 A |La-155 |60# ms |5/2+#
57 98 B |La-155 |~0.06 s |
