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Beryllium Isotopes

Radioactive Decay and Half-Life of Isotopes of Beryllium

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This is a periodic table tile for the element beryllium.

This is a periodic table tile for the element beryllium.

Todd Helmenstine
All beryllium atoms have four protons, but could have between one and ten neutrons. There are ten known isotopes of beryllium, ranging from Be-5 to Be-14. Many beryllium isotopes have multiple decay paths depending on the overall energy of the nucleus and its total angular momentum quantum number. This table lists the known isotopes of beryllium, their half-life and type of radioactive decay. The first entry corresponds to the nucleus where j=0 or the most stable isotope. Isotopes with multiple decay schemes are represented by a range of half-life values between the shortest and longest half-life for that type of decay.

Reference: International Atomic Energy Agency ENSDF database (Oct 2010)

Isotope Half-Life Decay
Be-5 unknown p
Be-6 5.8 x 10-22 sec - 7.2 x 10-21 sec p or α
Be-7 53.22 d
3.7 x 10-22 sec - 3.8 x 10-21 sec
EC
α, 3He, p possible
Be-8 1.9 x 10-22 sec - 1.2 x 10-16 sec
1.6 x 10-22 sec - 1.2 x 10-19 sec
α
α D, 3He, IT, n, p possible
Be-9 Stable
4.9 x 10-22 sec - 8.4 x 10-19 sec
9.6 x 10-22 sec - 1.7 x 10-18 sec
N/A
IT or n possible
α, D, IT, n, p possible
Be-10 1.5 x 106 yrs
7.5 x 10-21 sec
1.6 x 10-21 sec - 1.9 x 10-20 sec
β-
n
p
Be-11 13.8 sec
2.1 x 10-21 sec - 1.2 x 10-13 sec
β-
n
Be-12 21.3 ms β-
Be-13 2.7 x 10-21 sec believed n
Be-14 4.4 ms β-
 
α
β-
D
EC
γ
3He
IT
n
p
alpha decay
beta- decay
deuteron or hydrogen-2 nucleus ejected
electron capture
helium-3 nucleus ejected
isomeric transition
neutron emission
proton emission
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