Isotopes of boron

Isotopes of boron
Boron (5B) naturally occurs as isotopes and , the latter of which makes up about 80% of natural boron. There are 13 radioisotopes that have been discovered, with mass numbers from 7 to 21, all with short half-lives, the longest being that of , with a half-life of only and with a half-life of . All other isotopes have half-lives shorter than . Those isotopes with mass below 10 decay into helium (via short-lived isotopes of beryllium for and ) while those with mass above 11 mostly become carbon.
List of isotopes
|-
| ?
| style="text-align:center" | 5
| style="text-align:center" | 1
|
| p-unstable
| 2p?
| ?
| 2−#
|
|
|-
|
| style="text-align:center" | 5
| style="text-align:center" | 2
|
| []
| p
|
| (3/2−)
|
|
|-
|
| style="text-align:center" | 5
| style="text-align:center" | 3
|
|
| β+α
|
| 2+
|
|
|-
| style="text-indent:1em" |
| colspan="3" style="text-indent:2em" |
|
|
|
| 0+
|
|
|-
|
| style="text-align:center" | 5
| style="text-align:center" | 4
|
|
| p
| |
| 3/2−
|
|
|-
|
| style="text-align:center" | 5
| style="text-align:center" | 5
|
| colspan=3 align=center|Stable
| 3+
| colspan=2 align=center|[, ]
|-
|
| style="text-align:center" | 5
| style="text-align:center" | 6
|
| colspan=3 align=center|Stable
| 3/2−
| colspan=2 align=center|[, ]
|-
| style="text-indent:1em" |
| colspan="3" style="text-indent:2em" |
|
|
|
| 1/2+, (3/2+)
|
|
|-
| rowspan=2|
| rowspan=2 style="text-align:center" | 5
| rowspan=2 style="text-align:center" | 7
| rowspan=2|
| rowspan=2|
| β−
|
| rowspan=2|1+
| rowspan=2|
| rowspan=2|
|-
| β−α
|
|-
| rowspan=2|
| rowspan=2 style="text-align:center" | 5
| rowspan=2 style="text-align:center" | 8
| rowspan=2|
| rowspan=2|
| β−
|
| rowspan=2|3/2−
| rowspan=2|
| rowspan=2|
|-
| β−n
|
|-
| rowspan=3|
| rowspan=3 style="text-align:center" | 5
| rowspan=3 style="text-align:center" | 9
| rowspan=3|
| rowspan=3|
| β−
|
| rowspan=3|2−
| rowspan=3|
| rowspan=3|
|-
| β−n
|
|-
| β−2n ?
| ?
|-
| style="text-indent:1em" |
| colspan="3" style="text-indent:2em" |
|
| IT ?
|
| 0+
|
|
|-
| rowspan=3|
| rowspan=3 style="text-align:center" | 5
| rowspan=3 style="text-align:center" | 10
| rowspan=3|
| rowspan=3|
| β−n
|
| rowspan=3|3/2−
| rowspan=3|
| rowspan=3|
|-
| β− (< )
|
|-
| β−2n (< )
|
|-
|
| style=text-align:center | 5
| style=text-align:center | 11
|
| >
| n ?
| ?
| 0−
|
|
|-
| rowspan=5|
| rowspan=5 style=text-align:center | 5
| rowspan=5 style=text-align:center | 12
| rowspan=5|
| rowspan=5|
| β−n
|
| rowspan=5|(3/2−)
| rowspan=5|
| rowspan=5|
|-
| β−
|
|-
| β−2n
|
|-
| β−3n
|
|-
| β−4n
|
|-
|
| style=text-align:center | 5
| style=text-align:center | 13
|
| <
| n
|
| (2−)
|
|
|-
| rowspan=4|
| rowspan=4 style=text-align:center | 5
| rowspan=4 style=text-align:center | 14
| rowspan=4|
| rowspan=4|
| β−n
|
| rowspan=4|(3/2−)
| rowspan=4|
| rowspan=4|
|-
| β−2n
|
|-
| β−3n (< )
|
|-
| β− (> )
|
|-
|
| style=text-align:center | 5
| style=text-align:center | 15
|
| >
| n
|
| (1−, 2−)
|
|
|-
|
| style=text-align:center | 5
| style=text-align:center | 16
|
| >
| 2n
|
| (3/2−)
|
|
Neutrinos from boron-8 beta decays within the Sun are an important background to dark matter direct detection experiments. They are the first component of the neutrino floor that dark matter direct detection experiments are expected to eventually encounter.
Applications
Boron-10
Boron-10 is used in boron neutron capture therapy as an experimental treatment of some brain cancers.
References
Boron
Boron
https://borates.today/isotopes-a-comprehensive-guide/#:~:text=Boron%20isotope%20elements%20with%20masses,11%20mostly%20decay%20into%20carbon.