Talk:Isotopes of caesium

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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
 55  57 A   |Cs-112  |500(100) µs                |1+#
 55  57 B   |Cs-112  |0.5(1) ms                  |(0+,3+)
 55  57 C   |Cs-112  |0.5 ms                     |
 55  58 A   |Cs-113  |16.7(7) µs                 |5/2+#
 55  58 B   |Cs-113  |16.7(7) µs                 |(3/2+)
 55  58 C   |Cs-113  |17. µs                     |
 55  59 AB  |Cs-114  |0.57(2) s                  |(1+)
 55  59 C   |Cs-114  |0.58 s                     |1+
 55  60 A   |Cs-115  |1.4(8) s                   |9/2+#
 55  60 B   |Cs-115  |1.4(8) s                   |
 55  60 C   |Cs-115  |~1.4 s                     |
 55  61 AB  |Cs-116  |0.70(4) s                  |(1+)
 55  61 C   |Cs-116  |3.8 s                      |
 55  61 A   |Cs-116m |3.85(13) s                 |4+,5,6           |100(60)# keV
 55  61 E   |Cs-116m |3.85(13) s                 |4+,5,6           |100.# keV
 55  61 C   |Cs-116m |0.7 s                      |
 55  62 AB  |Cs-117  |8.4(6) s                   |(9/2+)#
 55  62 C   |Cs-117  |~8.4 s                     |
 55  62 A   |Cs-117m |6.5(4) s                   |3/2+#            |150(80)# keV
 55  62 E   |Cs-117m |6.5(4) s                   |(3/2+)           |150 keV
 55  62 C   |Cs-117m |6.5 s                      |
 55  63 AB  |Cs-118  |14(2) s                    |2
 55  63 C   |Cs-118  |14. s                      |2
 55  63 A   |Cs-118m |17(3) s                    |(7-)             |100(60)# keV
 55  63 E   |Cs-118m |17(3) s                    |6,7,8            |0+X keV
 55  63 C   |Cs-118m |17. s                      |
 55  64 AB  |Cs-119  |43.0(2) s                  |9/2+
 55  64 C   |Cs-119  |43. s                      |9/2+
 55  64 A   |Cs-119m |30.4(1) s                  |3/2(+)           |50(30)# keV
 55  64 E   |Cs-119m |30.4(1) s                  |3/2(+)           |0+X keV
 55  64 C   |Cs-119m |29. s                      |3/2
 55  65 A   |Cs-120  |61.2(18) s                 |2(-#)
 55  65 B   |Cs-120  |61.3(11) s                 |2(+)
 55  65 C   |Cs-120  |64. s                      |2+
 55  65 A   |Cs-120m |57(6) s                    |(7-)             |100(60)# keV
 55  65 E   |Cs-120m |57(6) s                    |(7-)             |0+X keV
 55  65 C   |Cs-120m |60. s                      |
 55  66 AB  |Cs-121  |155(4) s                   |3/2(+)
 55  66 C   |Cs-121  |2.3 min                    |3/2+
 55  66 AE  |Cs-121m |122(3) s                   |9/2(+)           |68.5(3) keV
 55  66 C   |Cs-121m |2.0 min                    |(9/2+)
 55  67 AB  |Cs-122  |21.18(19) s                |1+
 55  67 C   |Cs-122  |21. s                      |(1+)
 55  67 D   |Cs-122m1|>1 µs                      |(3)+             |45.8 keV
 55  67 A   |Cs-122m2|3.70(11) min               |8-               |140(30) keV
 55  67 D   |Cs-122m2|3.70(11) min               |8-               |76(24) keV
 55  67 B   |Cs-122m2|3.70(11) min               |8-               |0.1230 MeV
 55  67 C   |Cs-122m2|4.4 min                    |8-
 55  67 A   |Cs-122m3|360(20) ms                 |(5)-             |127.0(5) keV
 55  67 C   |Cs-122m3|0.36 s                     |
 55  67 E   |Cs-122m3|0.36(2) s                  |(5)-             |127.0 keV
 55  68 A   |Cs-123  |5.87(4) min                |1/2+
 55  68 B   |Cs-123  |5.88(3) min                |1/2+
 55  68 C   |Cs-123  |5.87 min                   |1/2+
 55  68 A   |Cs-123m1|1.64(12) s                 |(11/2)-          |156.74(21) keV
 55  68 E   |Cs-123m1|1.64(12) s                 |(11/2)-          |156.27(5) keV
 55  68 C   |Cs-123m1|1.6 s                      |11/2-
 55  68 D   |Cs-123m2|114(5) ns                  |(9/2+)           |231.63+X keV
 55  69 A   |Cs-124  |30.9(4) s                  |1+
 55  69 B   |Cs-124  |30.8(5) s                  |1+
 55  69 C   |Cs-124  |30. s                      |1+
 55  69 AE  |Cs-124m |6.3(2) s                   |(7)+             |462.55(17) keV
 55  69 C   |Cs-124m |6.3 s                      |7+
 55  70 A   |Cs-125  |45(1) min                  |1/2(+)
 55  70 B   |Cs-125  |46.7(1) min                |1/2(+)
 55  70 C   |Cs-125  |45. min                    |1/2+
 55  70 A   |Cs-125m |900(30) ms                 |(11/2-)          |266.6(11) keV
 55  70 D   |Cs-125m |0.90(3) ms                 |(11/2-)          |266.1(11) keV
 55  71 AB  |Cs-126  |1.64(2) min                |1+
 55  71 C   |Cs-126  |1.64 min                   |1+
 55  71 A   |Cs-126m1|>1 µs                      |                 |273.0(7) keV
 55  71 D   |Cs-126m1|>=1 µs                     |                 |273.0(7) keV
 55  71 AD  |Cs-126m2|171(14) µs                 |                 |596.1(11) keV
 55  72 AB  |Cs-127  |6.25(10) h                 |1/2+
 55  72 C   |Cs-127  |6.2 h                      |1/2+
 55  72 AD  |Cs-127m |55(3) µs                   |(11/2)-          |452.23(21) keV
 55  73 A   |Cs-128  |3.640(14) min              |1+
 55  73 B   |Cs-128  |3.66(2) min                |1+
 55  73 C   |Cs-128  |3.62 min                   |1+
 55  74 AB  |Cs-129  |32.06(6) h                 |1/2+
 55  74 C   |Cs-129  |1.336 d                    |1/2+
 55  75 ABC |Cs-130  |29.21(4) min               |1+
 55  75 AE  |Cs-130m |3.46(6) min                |5-               |163.25(11) keV
 55  75 C   |Cs-130m |3.5 min                    |5-
 55  76 ABC |Cs-131  |9.689(16) d                |5/2+
 55  77 A   |Cs-132  |6.479(7) d                 |2+
 55  77 BC  |Cs-132  |6.480(6) d                 |2+
 55  78 ABC |Cs-133  |STABLE                     |7/2+
 55  79 A   |Cs-134  |2.0648(10) a               |4+
 55  79 BC  |Cs-134  |2.0652(4) a                |4+
 55  79 A   |Cs-134m |2.903(8) h                 |8-               |138.7441(26) keV
 55  79 E   |Cs-134m |2.912(2) h                 |8-               |138.7441(26) keV
 55  79 C   |Cs-134m |2.91 h                     |8-
 55  80 ABC |Cs-135  |2.3(3)E+6 a                |7/2+
 55  80 AE  |Cs-135m |53(2) min                  |19/2-            |1632.9(15) keV
 55  80 C   |Cs-135m |53. min                    |19/2-
 55  81 AC  |Cs-136  |13.16(3) d                 |5+
 55  81 B   |Cs-136  |13.04(3) d                 |5+
 55  81 A   |Cs-136m |19(2) s                    |8-               |518(5) keV
 55  81 E   |Cs-136m |19(2) s                    |8-               |X keV
 55  81 C   |Cs-136m |19. s                      |8
 55  82 AC  |Cs-137  |30.1671(13) a              |7/2+
 55  82 B   |Cs-137  |30.03(5) a                 |7/2+
 55  83 AB  |Cs-138  |33.41(18) min              |3-
 55  83 C   |Cs-138  |32.2 min                   |3-
 55  83 AE  |Cs-138m |2.91(8) min                |6-               |79.9(3) keV
 55  83 C   |Cs-138m |2.9 min                    |6-
 55  84 ABC |Cs-139  |9.27(5) min                |7/2+
 55  85 ABC |Cs-140  |63.7(3) s                  |1-
 55  86 ABC |Cs-141  |24.84(16) s                |7/2+
 55  87 A   |Cs-142  |1.689(11) s                |0-
 55  87 B   |Cs-142  |1.684(14) s                |0-
 55  87 C   |Cs-142  |1.8 s                      |
 55  88 AB  |Cs-143  |1.791(7) s                 |3/2+
 55  88 C   |Cs-143  |1.78 s                     |(3/2+)
 55  89 A   |Cs-144  |994(4) ms                  |1(-#)
 55  89 B   |Cs-144  |0.994(4) s                 |1
 55  89 C   |Cs-144  |1.01 s                     |1
 55  89 A   |Cs-144m |<1 s                       |(>3)             |300(200)# keV
 55  89 E   |Cs-144m |<1 s                       |(>=4)            |X keV
 55  90 A   |Cs-145  |582(6) ms                  |3/2+
 55  90 BC  |Cs-145  |0.594(13) s                |3/2+
 55  91 A   |Cs-146  |323(6) ms                  |1-
 55  91 B   |Cs-146  |0.321(2) s                 |1-
 55  91 C   |Cs-146  |0.322 s                    |2-
 55  92 A   |Cs-147  |225(5) ms                  |(3/2+)
 55  92 B   |Cs-147  |0.235(3) s                 |(3/2+)
 55  92 C   |Cs-147  |0.227 s                    |
 55  93 ABC |Cs-148  |146(6) ms                  |
 55  94 A   |Cs-149  |150# ms [>50 ms]           |3/2+#
 55  94 BC  |Cs-149  |>50 ms                     |
 55  95 A   |Cs-150  |100# ms [>50 ms]           |
 55  95 BC  |Cs-150  |>50 ms                     |
 55  96 A   |Cs-151  |60# ms [>50 ms]            |3/2+#
 55  96 BC  |Cs-151  |>50 ms                     |

Femto 12:14, 15 November 2005 (UTC)

Talk[edit]

Ok, both Xenon and Caesium say that they are second in the number of isotopes. Caesium says it's second to Xenon, Xenon is second to tin.

One says "isotopes" the other stable isotopes. So this is not absolutely contraditory, but perhaps some phrasing might be in order to clear this up?

Caesium area stability trend data[edit]

After the occurrence of 9 stable isotopes in 54 Xe with the heaviest being EE54Xe136 and having 82 neutrons (28extra neutrons above the Z number), the element 55Cs is noted to be Monisotopic with only 1 stable isotope at OE55Cs133 with only 78 neutrons (23 extra neutrons above the Z number). It also is the beginning of a stability trend away from higher stable extra neutron isotopes for 4 more isotopes down to the also Monisotopic element OE59Pr141 with 82 neutrohns (and 23 extra neutrons above the Z number). This evidently results in a rebalancing of the structure of the atom such as to permit it to return to the accumulation of 2 neutrons per ptoton along a stability trend line with the formula A = 3Z - 36 (except for 61Pm), which runs from OE59Pr141 up to EE68Er168 (which has 100 neutrons and 32 extra neutrons above the Z number), a span of 10 elements. This structural stability decay after 54Xe and subsequent return after 59Pr is indicative that the stability of the atom is related to its structural features as well as to its electrostatic and magnetic properties.WFPM (talk) 10:35, 3 November 2010 (UTC)

Also note that in accordance with the indications of the Janet periodic table, see Charles Janet, the element 55Cs is involved with the accumulation of the first half (deuteron) half of the 6th alpha particle that is incorporated into the nucleus of the atom, which may explain the instability until the 6th alpha particle accumulation is completed in 56Ba, and that 56Ba has 7 stable isotopes up to EE56Ba138 with 82 neutrons (and 26 extra neutrons above the Z number) and 72 percent constituency.WFPM (talk) 10:35, 3 November 2010 (UTC)

It is finally noted that on the low side of the center of stability (OE55Cs133) The half-life values of the OO isotopes falls off drastically in comparison to the to the half-lives of the OE isotopes (by about 2 orders of magnitude). This occurs to the isotopes OO55Cs130, OO55Cs128, OO55Cs126, And OO55Cs124.WFPM (talk) 23:24, 21 April 2013 (UTC)

Grammar correction[edit]

" ... caesium isotopes were released into the atmosphere where it is absorbed readily into solution and is returned to the surface of the earth ... " There's a number inconsistency here: "isotopes" is the subject, and is obviously plural - but the following pronoun ("it") is obviously singular, as is the associated verb. Wouldn't " ... caesium isotopes were released into the atmosphere where they are readily absorbed into solution and are returned to the surface of the earth ... " be better? 121.44.172.159 (talk) 08:20, 16 December 2013 (UTC)Hawkeye