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Isotopes of bromine



Bromine (Br)
Standard atomic mass: 79.904(1) u

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Table

nuclide
symbol
Z(p) N(n)  
isotopic mass (u)
 
half-life nuclear
spin
representative
isotopic
composition
(mole fraction)
range of natural
variation
(mole fraction)
excitation energy
67Br 35 32 66.96479(54)# 1/2-#
68Br 35 33 67.95852(38)# <1.2 µs 3+#
69Br 35 34 68.95011(11)# <24 ns 1/2-#
70Br 35 35 69.94479(33)# 79.1(8) ms 0+#
70mBr 2292.2(8) keV 2.2(2) s (9+)
71Br 35 36 70.93874(61) 21.4(6) s (5/2)-
72Br 35 37 71.93664(6) 78.6(24) s 1+
72mBr 100.92(3) keV 10.6(3) s 1-
73Br 35 38 72.93169(5) 3.4(2) min 1/2-
74Br 35 39 73.929891(16) 25.4(3) min (0-)
74mBr 13.58(21) keV 46(2) min 4(+#)
75Br 35 40 74.925776(15) 96.7(13) min 3/2-
76Br 35 41 75.924541(10) 16.2(2) h 1-
76mBr 102.58(3) keV 1.31(2) s (4)+
77Br 35 42 76.921379(3) 57.036(6) h 3/2-
77mBr 105.86(8) keV 4.28(10) min 9/2+
78Br 35 43 77.921146(4) 6.46(4) min 1+
78mBr 180.82(13) keV 119.2(10) µs (4+)
79Br 35 44 78.9183371(22) STABLE 3/2- 0.5069(7)
79mBr 207.61(9) keV 4.86(4) s (9/2+)
80Br 35 45 79.9185293(22) 17.68(2) min 1+
80mBr 85.843(4) keV 4.4205(8) h 5-
81Br 35 46 80.9162906(21) STABLE 3/2- 0.4931(7)
81mBr 536.20(9) keV 34.6(28) µs 9/2+
82Br 35 47 81.9168041(21) 35.282(7) h 5-
82mBr 45.9492(10) keV 6.13(5) min 2-
83Br 35 48 82.915180(5) 2.40(2) h 3/2-
83mBr 3068.8(6) keV 700(100) ns (19/2-)
84Br 35 49 83.916479(16) 31.80(8) min 2-
84m1Br 320(10) keV 6.0(2) min 6-
84m2Br 408.2(4) keV <140 ns 1+
85Br 35 50 84.915608(21) 2.90(6) min 3/2-
86Br 35 51 85.918798(12) 55.1(4) s (2-)
87Br 35 52 86.920711(19) 55.65(13) s 3/2-
88Br 35 53 87.92407(4) 16.29(6) s (2-)
88mBr 272.7(3) keV 5.4(7) µs
89Br 35 54 88.92639(6) 4.40(3) s (3/2-,5/2-)
90Br 35 55 89.93063(8) 1.91(1) s
91Br 35 56 90.93397(8) 541(5) ms 3/2-#
92Br 35 57 91.93926(5) 0.343(15) s (2-)
93Br 35 58 92.94305(32)# 102(10) ms 3/2-#
94Br 35 59 93.94868(43)# 70(20) ms
95Br 35 60 94.95287(54)# 50# ms [>300 ns] 3/2-#
96Br 35 61 95.95853(75)# 20# ms [>300 ns]
97Br 35 62 96.96280(86)# 10# ms [>300 ns] 3/2-#

Notes

  • Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
  • Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.

References

  • Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
  • Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
  • Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
    • Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
    • National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
    • 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.


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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes_of_bromine". A list of authors is available in Wikipedia.
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