# 溴的同位素

主要的溴同位素|

| 同位素
 | 衰變
 |
| --- | --- |
|  | 丰度
 | 半衰期 (*t*1/2) | 方式
 | 能量 （MeV）
 | 產物
 |
| 75Br
 | 人造
 | 96.7 分钟 | β+ | 2.040
 | 75Se
 |
| 76Br
 | 人造
 | 16.2 小时 | β+ | 3.941
 | 76Se
 |
| 77Br
 | 人造
 | 57.04 小时 | β+ | 0.343
 | 77Se
 |
| 79Br
 | 50.65%
 | 穩定，帶44粒中子
 |
| 80mBr
 | 人造
 | 4.4205 小时 | IT
 | 0.086
 | 80Br
 |
| 81Br
 | 49.35%
 | 穩定，帶46粒中子
 |
| 82Br
 | 人造
 | 35.282 小时 | β− | 3.093
 | 82Kr
 |

 |
| 標準原子質量 (*A*r, 標準) | * [79.901, 79.907]
* 傳統: 79.904
 |
|

|  |  |
| --- | --- |
| ←Se（34） | Kr（36）→ |

 |
|

**溴**共有45個同位素，其中有2個同位素是穩定的。

## 圖表

| 符號
 | Z
 | N
 | 同位素質量（u）
 | 半衰期
 | 衰變 方式
 | 衰變 產物
 | 原子核 自旋
 | 相對豐度 （莫耳分率）
 | 相對豐度 的變化量 （莫耳分率）
 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 激發能量
 |
| 68Br
 | 35
 | 33
 | 67.95836(28)#
 | ~50 ns
 | p
 | 67Se
 | 3+#
 |  |  |
| 69Br
 | 35
 | 34
 | 68.95011(11)#
 | <24 ns
 | p
 | 68Se
 | 1/2−#
 |  |  |
| 70Br
 | 35
 | 35
 | 69.94479(33)#
 | 79.1(8) ms
 | β+ | 70Se
 | 0+#
 |  |  |
| 70mBr
 | 2292.2(8) keV
 | 2.2(2) s
 | β+ | 70Se
 | (9+)
 |  |  |
| IT
 | 70Br
 |
| 71Br
 | 35
 | 36
 | 70.93874(61)
 | 21.4(6) s
 | β+ | 71Se
 | (5/2)−
 |  |  |
| 72Br
 | 35
 | 37
 | 71.93664(6)
 | 78.6(24) s
 | β+ | 72Se
 | 1+
 |  |  |
| 72mBr
 | 100.92(3) keV
 | 10.6(3) s
 | IT (>99.9%)
 | 72Br
 | 1−
 |  |  |
| β+ (<0.1%)
 | 72Se
 |
| 73Br
 | 35
 | 38
 | 72.93169(5)
 | 3.4(2) min
 | β+ | 73Se
 | 1/2−
 |  |  |
| 74Br
 | 35
 | 39
 | 73.929891(16)
 | 25.4(3) min
 | β+ | **74Se** | (0−)
 |  |  |
| 74mBr
 | 13.58(21) keV
 | 46(2) min
 | β+ | **74Se** | 4(+#)
 |  |  |
| 75Br
 | 35
 | 40
 | 74.925776(15)
 | 96.7(13) min
 | β+ | 75Se
 | 3/2−
 |  |  |
| 76Br
 | 35
 | 41
 | 75.924541(10)
 | 16.2(2) h
 | β+ | **76Se** | 1−
 |  |  |
| 76mBr
 | 102.58(3) keV
 | 1.31(2) s
 | IT (99.4%)
 | 76Br
 | (4)+
 |  |  |
| β+ (0.6%)
 | **76Se** |
| 77Br
 | 35
 | 42
 | 76.921379(3)
 | 57.036(6) h
 | β+ | **77Se** | 3/2−
 |  |  |
| 77mBr
 | 105.86(8) keV
 | 4.28(10) min
 | IT
 | 77Br
 | 9/2+
 |  |  |
| 78Br
 | 35
 | 43
 | 77.921146(4)
 | 6.46(4) min
 | β+ (99.99%)
 | **78Se** | 1+
 |  |  |
| β− (0.01%)
 | 78Kr |
| 78mBr
 | 180.82(13) keV
 | 119.2(10) µs
 |  |  | (4+)
 |  |  |
| 79 Br  | 35
 | 44
 | 78.9183371(22)
 | **稳定** | 3/2−
 | 0.5069(7)
 |  |
| 79mBr
 | 207.61(9) keV
 | 4.86(4) s
 | IT
 | **79Br** | (9/2+)
 |  |  |
| 80Br
 | 35
 | 45
 | 79.9185293(22)
 | 17.68(2) min
 | β− (91.7%)
 | **80Kr** | 1+
 |  |  |
| β+ (8.3%)
 | **80Se** |
| 80mBr
 | 85.843(4) keV
 | 4.4205(8) h
 | IT
 | 80Br
 | 5−
 |  |  |
| 81Br
 | 35
 | 46
 | 80.9162906(21)
 | **稳定** | 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
 | β− | **82Kr** | 5−
 |  |  |
| 82mBr
 | 45.9492(10) keV
 | 6.13(5) min
 | IT
 | 82Br
 | 2−
 |  |  |
| β− | **82Kr** |
| 83Br
 | 35
 | 48
 | 82.915180(5)
 | 2.40(2) h
 | β− | **83Kr** | 3/2−
 |  |  |
| 83mBr
 | 3068.8(6) keV
 | 700(100) ns
 |  |  | (19/2−)
 |  |  |
| 84Br
 | 35
 | 49
 | 83.916479(16)
 | 31.80(8) min
 | β− | **84Kr** | 2−
 |  |  |
| 84m1Br
 | 320(10) keV
 | 6.0(2) min
 | β− | **84Kr** | 6−
 |  |  |
| 84m2Br
 | 408.2(4) keV
 | <140 ns
 |  |  | 1+
 |  |  |
| 85Br
 | 35
 | 50
 | 84.915608(21)
 | 2.90(6) min
 | β− | 85Kr
 | 3/2−
 |  |  |
| 86Br
 | 35
 | 51
 | 85.918798(12)
 | 55.1(4) s
 | β− | **86Kr** | (2−)
 |  |  |
| 87Br
 | 35
 | 52
 | 86.920711(19)
 | 55.65(13) s
 | β− (97.48%)
 | 87Kr
 | 3/2−
 |  |  |
| β−, n (2.52%)
 | **86Kr** |
| 88Br
 | 35
 | 53
 | 87.92407(4)
 | 16.29(6) s
 | β− (93.42%)
 | 88Kr
 | (2−)
 |  |  |
| β−, n (6.48%)
 | 87Kr
 |
| 88mBr
 | 272.7(3) keV
 | 5.4(7) µs
 |  |  |  |  |  |
| 89Br
 | 35
 | 54
 | 88.92639(6)
 | 4.40(3) s
 | β− (86.2%)
 | 89Kr
 | (3/2−,5/2−)
 |  |  |
| β−, n (13.8%)
 | 88Kr
 |
| 90Br
 | 35
 | 55
 | 89.93063(8)
 | 1.91(1) s
 | β− (74.8%)
 | 90Kr
 |  |  |  |
| β−, n (25.2%)
 | 89Kr
 |
| 91Br
 | 35
 | 56
 | 90.93397(8)
 | 541(5) ms
 | β− (80%)
 | 91Kr
 | 3/2−#
 |  |  |
| β−, n (20%)
 | 90Kr
 |
| 92Br
 | 35
 | 57
 | 91.93926(5)
 | 0.343(15) s
 | β− (66.9%)
 | 92Kr
 | (2−)
 |  |  |
| β−, n (33.1%)
 | 91Kr
 |
| 93Br
 | 35
 | 58
 | 92.94305(32)#
 | 102(10) ms
 | β− (89%)
 | 93Kr
 | 3/2−#
 |  |  |
| β−, n (11%)
 | 92Kr
 |
| 94Br
 | 35
 | 59
 | 93.94868(43)#
 | 70(20) ms
 | β− (70%)
 | 94Kr
 |  |  |  |
| β−, n (30%)
 | 93Kr
 |
| 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−#
 |  |  |
| 98Br
 | 35
 | 63
 | (98)#
 |  |  |  |  |  |  |

|  |  |  |
| --- | --- | --- |
| ←
 | 同位素列表
 | →
 |
| 硒的同位素
 | **溴的同位素** | 氪的同位素
 |

## 参考文獻

* 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) （页面存档备份，存于互联网档案馆）. *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 （页面存档备份，存于互联网档案馆）, Nuc. Phys. A 729, pp. 3-128 (2003).
	+ National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database （页面存档备份，存于互联网档案馆） (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.