硼的同位素

硼（原子量：10.811(7)）共有14個已知同位素，質量數介於7-19之間，其中有2個是穩定的，其他都具有放射性。天然存在的硼同位素有2個，分別是10B和11B，皆為穩定同位素。其他放射性同位素都不出現在自然界中，只有在實驗室製造出來過，且半衰期都極短，非常不穩定。

圖表

|-
| 7B
| style="text-align:right" | 5
| style="text-align:right" | 2
| 7.02992(8)
| 350(50)×10−24 s[1.4(2) MeV]
| 
| Subsequently decays by double proton emission to 4He for a net reaction of 7B → 4He + 31H
| (−)
|
|
|-
| 8BHas 1  proton
| style="text-align:right" | 5
| style="text-align:right" | 3
| 8.0246072(11)
| 770(3) ms
| , 
| 2 
| 2+
|
|
|-
| 9B
| style="text-align:right" | 5
| style="text-align:right" | 4
| 9.0133288(11)
| 800(300)×10−21 s[0.54(21) keV]
| 
| immediately decays into two α particles, for a net reaction of 9B → 2 4He + 1H
| −
|
|
|-
| 10B
| style="text-align:right" | 5
| style="text-align:right" | 5
| 10.0129370(4)
| colspan=3 align=center|
| 3+
| 0.199(7)
| 0.18929–0.20386
|-
| 
| style="text-align:right" | 5
| style="text-align:right" | 6
| 11.0093054(4)
| colspan=3 align=center|
| −
| 0.801(7)
| 0.79614–0.81071
|-
| rowspan=2|12B
| rowspan=2 style="text-align:right" | 5
| rowspan=2 style="text-align:right" | 7
| rowspan=2|12.0143521(15)
| rowspan=2|20.20(2) ms
|  (98.4%)
| 
| rowspan=2|1+
| rowspan=2|
| rowspan=2|
|-
| ,  (1.6%)
| Immediately decays into two α particles, for a net reaction of 12B → 34He +  e−
|-
| rowspan=2|13B
| rowspan=2 style="text-align:right" | 5
| rowspan=2 style="text-align:right" | 8
| rowspan=2|13.0177802(12)
| rowspan=2|17.33(17) ms
|  (99.72%)
| 
| rowspan=2|−
| rowspan=2|
| rowspan=2|
|-
| β−, n (0.279%)
| 
|-
| rowspan=2|14B
| rowspan=2 style="text-align:right" | 5
| rowspan=2 style="text-align:right" | 9
| rowspan=2|14.025404(23)
| rowspan=2|12.5(5) ms
| β− (93.96%)
| 
| rowspan=2|2−
| rowspan=2|
| rowspan=2|
|-
| β−, n (6.04%)
| 
|-
| rowspan=3|15B
| rowspan=3 style="text-align:right" | 5
| rowspan=3 style="text-align:right" | 10
| rowspan=3|15.031103(24)
| rowspan=3|9.87(7) ms
| β−, n (93.6%)
| 
| rowspan=3|−
| rowspan=3|
| rowspan=3|
|-
| β− (6.0%)
| 
|-
| β−, 2n (0.40%)
| 
|-
| 16B
| style="text-align:right" | 5
| style="text-align:right" | 11
| 16.03981(6)
| <190×10−12 s[<0.1 MeV]
| n
| 
| 0−
|
|
|-
| rowspan=5|17BHas 2 halo neutrons
| rowspan=5 style="text-align:right" | 5
| rowspan=5 style="text-align:right" | 12
| rowspan=5|17.04699(18)
| rowspan=5|5.08(5) ms
| β−, n (63.0%)
| 
| rowspan=5|(−)
| rowspan=5|
| rowspan=5|
|-
| β− (22.1%)
| 
|-
| β−, 2n (11.0%)
| 
|-
| β−, 3n (3.5%)
| 
|-
| β−, 4n (0.40%)
| 
|-
| 18B
| style="text-align:right" | 5
| style="text-align:right" | 13
| 18.05560(22)
| <26 ns
| n
| 
| (4−)
|
|
|-
| 19B
| style="text-align:right" | 5
| style="text-align:right" | 14
| 19.06417(56)
| 2.92(13) ms
| β−
| 
| (−)
|
|
|-
| 20B
| style="text-align:right" | 5
| style="text-align:right" | 15
| 20.07451(59)
| > 912.4 ys
| n
| 
| (1−, 2-)
|
|
|-
| 21B
| style="text-align:right" | 5
| style="text-align:right" | 16
| 21.08415(60)
| > 760 ys
| 2n
| 
| (−)
|
|
|}

硼-8
硼-8是一种硼的同位素，会通过β+衰变衰变成铍-8，半衰期771.9毫秒。它有一个质子组成的。虽然太阳中微子只有少部分（80 ppm）源自硼-8的衰变，但硼-8衰变产生的中微子有约10 MeV的高能量，是直接探测暗物质的实验中重要的背景。

 參考文獻 

 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) . 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.

B
Category:硼