Isotopes of bromine

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

[edit] 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)
nuclide symbol	excitation energy			half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
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-#

[edit] 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.

[edit] 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.