# Isotopen van broom

Het chemisch element broom (Br), met een atoommassa van 79,904(1) u, bezit 2 stabiele isotopen: $^{79}$Br en $^{81}$Br, die ongeveer in gelijke mate voorkomen. De overige 30 radio-isotopen zijn instabiel en hebben een relatief korte halveringstijd (de meeste minder dan een seconde).
De kortstlevende isotoop van broom is $^{69}$Br, met een halfwaardetijd van minder dan 24 nanoseconden. De langstlevende is $^{77}$Br, met een halfwaardetijd van ongeveer 57 uur.

## Overzicht

| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) |
| Natuurlijk voorkomen (molfractie) |||
| $^{66}$Br | 35 | 31 | | | p | $^{65}$Se | | |
| $^{67}$Br | 35 | 32 | 66,96479(54) | | p | $^{66}$Se | 1/2$^−$ | |
| $^{68}$Br | 35 | 33 | 67,95852(38) | < 1,2 µs | p | $^{67}$Se | 3$^+$ | |
| $^{69}$Br | 35 | 34 | 68,95011(11) | < 24 ns | p | $^{68}$Se | 1/2$^−$ | |
| $^{70}$Br | 35 | 35 | 69,94479(33) | 79,1(8) ms | β$^+$ | $^{70}$Se | 0$^+$ | |
| $^{70m}$Br | 2292,2(8) keV | 2292,2(8) keV | 2292,2(8) keV | 2,2(2) s | β$^+$ | $^{70}$Se | (9$^+$) | |
| $^{70m}$Br | 2292,2(8) keV | 2292,2(8) keV | 2292,2(8) keV | 2,2(2) s | IT | $^{70}$Br | (9$^+$) | |
| $^{71}$Br | 35 | 36 | 70,93874(61) | 21,4(6) s | β$^+$ | $^{71}$Se | 5/2$^−$ | |
| $^{72}$Br | 35 | 37 | 71,93664(6) | 78,6(24) s | β$^+$ | $^{72}$Se | 1$^+$ | |
| $^{72m}$Br | 100,92(3) keV | 100,92(3) keV | 100,92(3) keV | 10,6(3) s | IT (> 99,9%) | $^{72}$Br | 1$^−$ | |
| $^{72m}$Br | 100,92(3) keV | 100,92(3) keV | 100,92(3) keV | 10,6(3) s | β$^+$ (< 0,1%) | $^{72}$Se | 1$^−$ | |
| $^{73}$Br | 35 | 38 | 72,93169(5) | 3,4(2) min | β$^+$ | $^{73}$Se | 1/2$^−$ | |
| $^{74}$Br | 35 | 39 | 73,929891(16) | 25,4(3) min | β$^+$ | $^{74}$Se | (0$^−$) | |
| $^{74m}$Br | 13,58(21) keV | 13,58(21) keV | 13,58(21) keV | 46(2) min | β$^+$ | $^{74}$Se | 4$^+$ | |
| $^{75}$Br | 35 | 40 | 74,925776(15) | 96,7(13) min | β$^+$ | $^{75}$Se | 3/2$^−$ | |
| $^{76}$Br | 35 | 41 | 75,924541(10) | 16,2(2) uur | β$^+$ | $^{76}$Se | 1$^−$ | |
| $^{76m}$Br | 102,58(3) keV | 102,58(3) keV | 102,58(3) keV | 1,31(2) s | IT (99,4%) | $^{76}$Br | (4)$^+$ | |
| $^{76m}$Br | 102,58(3) keV | 102,58(3) keV | 102,58(3) keV | 1,31(2) s | β$^+$ (0,6%) | $^{76}$Se | (4)$^+$ | |
| $^{77}$Br | 35 | 42 | 76,921379(3) | 57,036(6) uur | β$^+$ | $^{77}$Se | 3/2$^−$ | |
| $^{77m}$Br | 105,86(8) keV | 105,86(8) keV | 105,86(8) keV | 4,28(10) min | IT | $^{77}$Br | 9/2$^+$ | |
| $^{78}$Br | 35 | 43 | 77,921146(4) | 6,46(4) min | β$^+$ (99,99%) | $^{78}$Se | 1$^+$ | |
| $^{78}$Br | 35 | 43 | 77,921146(4) | 6,46(4) min | β$^−$ (,01%) | $^{78}$Kr | 1$^+$ | |
| $^{78m}$Br | 180,82(13) keV | 180,82(13) keV | 180,82(13) keV | 119,2(10) µs | | | (4$^+$) | |
| $^{79}$Br | 35 | 44 | 78,9183371(22) | stabiel | stabiel | stabiel | 3/2$^−$ | 0,5069(7) |
| $^{79m}$Br | 207,61(9) keV | 207,61(9) keV | 207,61(9) keV | 4,86(4) s | IT | $^{79}$Br | (9/2$^+$) | |
| $^{80}$Br | 35 | 45 | 79,9185293(22) | 17,68(2) min | β$^−$ (91,7%) | $^{80}$Kr | 1$^+$ | |
| $^{80}$Br | 35 | 45 | 79,9185293(22) | 17,68(2) min | β$^+$ (8,3%) | $^{80}$Se | 1$^+$ | |
| $^{80m}$Br | 85,843(4) keV | 85,843(4) keV | 85,843(4) keV | 4,4205(8) uur | IT | $^{80}$Br | 5$^−$ | |
| $^{81}$Br | 35 | 46 | 80,9162906(21) | stabiel | stabiel | stabiel | 3/2$^−$ | 0,4931(7) |
| $^{81m}$Br | 536,20(9) keV | 536,20(9) keV | 536,20(9) keV | 34,6(28) µs | | | 9/2$^+$ | |
| $^{82}$Br | 35 | 47 | 81,9168041(21) | 35,282(7) uur | β$^−$ | $^{82}$Kr | 5$^−$ | |
| $^{82m}$Br | 45,9492(10) keV | 45,9492(10) keV | 45,9492(10) keV | 6,13(5) min | IT | $^{82}$Br | 2- | |
| $^{82m}$Br | 45,9492(10) keV | 45,9492(10) keV | 45,9492(10) keV | 6,13(5) min | β$^−$ | $^{82}$Kr | 2- | |
| $^{83}$Br | 35 | 48 | 82,915180(5) | 2,40(2) uur | β$^−$ | $^{83}$Kr | 3/2$^−$ | |
| $^{83m}$Br | 3068,8(6) keV | 3068,8(6) keV | 3068,8(6) keV | 700(100) ns | | | (19/2$^−$) | |
| $^{84}$Br | 35 | 49 | 83,916479(16) | 31,80(8) min | β$^−$ | $^{84}$Kr | 2$^−$ | |
| $^{84m1}$Br | 320(10) keV | 320(10) keV | 320(10) keV | 6,0(2) min | β$^−$ | $^{84}$Kr | 6$^−$ | |
| $^{84m2}$Br | 408,2(4) keV | 408,2(4) keV | 408,2(4) keV | < 140 ns | | | 1$^+$ | |
| $^{85}$Br | 35 | 50 | 84,915608(21) | 2,90(6) min | β$^−$ | $^{85}$Kr | 3/2$^−$ | |
| $^{86}$Br | 35 | 51 | 85,918798(12) | 55,1(4) s | β$^−$ | $^{86}$Kr | (2$^−$) | |
| $^{87}$Br | 35 | 52 | 86,920711(19) | 55,65(13) s | β$^−$ (97,48%) | $^{87}$Kr | 3/2$^−$ | |
| $^{87}$Br | 35 | 52 | 86,920711(19) | 55,65(13) s | β$^−$, n (2,52%) | $^{86}$Kr | 3/2$^−$ | |
| $^{88}$Br | 35 | 53 | 87,92407(4) | 16,29(6) s | β$^−$ (93,42%) | $^{88}$Kr | (2-) | |
| $^{88}$Br | 35 | 53 | 87,92407(4) | 16,29(6) s | β$^−$, n (6,48%) | $^{87}$Kr | (2-) | |
| $^{88m}$Br | 272,7(3) keV | 272,7(3) keV | 272,7(3) keV | 5,4(7) µs | | | | |
| $^{89}$Br | 35 | 54 | 88,92639(6) | 4,40(3) s | β$^−$ (86,2%) | $^{89}$Kr | (3/2$^−$, 5/2$^−$) | |
| $^{89}$Br | 35 | 54 | 88,92639(6) | 4,40(3) s | β$^−$, n (13,8%) | $^{88}$Kr | (3/2$^−$, 5/2$^−$) | |
| $^{90}$Br | 35 | 55 | 89,93063(8) | 1,91(1) s | β$^−$ (74,8%) | $^{90}$Kr | | |
| $^{90}$Br | 35 | 55 | 89,93063(8) | 1,91(1) s | β$^−$, n (25,2%) | $^{89}$Kr | | |
| $^{91}$Br | 35 | 56 | 90,93397(8) | 541(5) ms | β$^−$ (80%) | $^{91}$Kr | 3/2$^−$ | |
| $^{91}$Br | 35 | 56 | 90,93397(8) | 541(5) ms | β$^−$, n (20%) | $^{90}$Kr | 3/2$^−$ | |
| $^{92}$Br | 35 | 57 | 91,93926(5) | 0,343(15) s | β$^−$ (66,9%) | $^{92}$Kr | (2$^−$) | |
| $^{92}$Br | 35 | 57 | 91,93926(5) | 0,343(15) s | β$^−$, n (33,1%) | $^{91}$Kr | (2$^−$) | |
| $^{93}$Br | 35 | 58 | 92,94305(32) | 102(10) ms | β$^−$ (89%) | $^{93}$Kr | 3/2$^−$ | |
| $^{93}$Br | 35 | 58 | 92,94305(32) | 102(10) ms | β$^−$, n (11%) | $^{92}$Kr | 3/2$^−$ | |
| $^{94}$Br | 35 | 59 | 93,94868(43) | 70(20) ms | β$^−$ (70%) | $^{94}$Kr | | |
| $^{94}$Br | 35 | 59 | 93,94868(43) | 70(20) ms | β$^−$, n (30%) | $^{93}$Kr | | |
| $^{95}$Br | 35 | 60 | 94,95287(54) | 50 ms | | | 3/2$^−$ | |
| $^{96}$Br | 35 | 61 | 95,95853(75) | 20 ms | | | | |
| $^{97}$Br | 35 | 62 | 96,96280(86) | 10 ms | | | 3/2$^−$ | |

## Overzicht van isotopen per element

* (en) R.B. Firestone, S.Y. Frank Chu & C.M. Baglin (1999) - Table of Isotopes (online versie van de cd-rom)
* (en) G. Audi, A.H. Wapstra, C. Thibault, J. Blachot & O. Bersillon (2003) - The NUBASE evaluation of nuclear and decay properties, Nuclear Physics A, 729, pp. 3-128
* (en) J.R. de Laeter, J.K. Böhlke, P. De Bièvre, H. Hidaka, H.S. Peiser, K.J.R. Rosman & P.D.P. Taylor (2003) - Atomic weights of the elements. Review 2000 (IUPAC Technical Report), Pure and Applied Chemistry, 75 (6), pp. 683–800
* (en) M.E. Wieser (2006) - Atomic weights of the elements 2005 (IUPAC Technical Report), Pure and Applied Chemistry, 78 (11), pp. 2051–2066
* (en) David R. Lide (2004) - CRC Handbook of Chemistry and Physics (85th ed.), hoofdstuk 11, CRC Press - ISBN 978-0849304859
$^{66}$Br · $^{67}$Br · $^{68}$Br · $^{69}$Br · $^{70}$Br · $^{70m}$Br · $^{71}$Br · $^{72}$Br · $^{72m}$Br · $^{73}$Br · $^{74}$Br · $^{74m}$Br · $^{75}$Br · $^{76}$Br · $^{76m}$Br · $^{77}$Br · $^{77m}$Br · $^{78}$Br · $^{78m}$Br · $^{79}$Br · $^{79m}$Br · $^{80}$Br · $^{80m}$Br · $^{81}$Br · $^{81m}$Br · $^{82}$Br · $^{82m}$Br · $^{83}$Br · $^{83m}$Br · $^{84}$Br · $^{84m1}$Br · $^{84m2}$Br · $^{85}$Br · $^{86}$Br · $^{87}$Br · $^{88}$Br · $^{88m}$Br · $^{89}$Br · $^{90}$Br · $^{91}$Br · $^{92}$Br · $^{93}$Br · $^{94}$Br · $^{95}$Br · $^{96}$Br · $^{97}$Br · $^{98}$Br