Beryllium Isotopes

Radioactive Decay and Half-Life of Isotopes of Beryllium

Beryllium (Chemical Element)
Science Picture Co/Collection Mix:Subjects/Getty Images

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)

IsotopeHalf-LifeDecay
Be-5unknownp
Be-65.8 x 10-22 sec - 7.2 x 10-21 secp or α
Be-753.22 d
3.7 x 10-22 sec - 3.8 x 10-21 sec
EC
α, 3He, p possible
Be-81.9 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-9Stable
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-101.5 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-1113.8 sec
2.1 x 10-21 sec - 1.2 x 10-13 sec
β-
n
Be-1221.3 msβ-
Be-132.7 x 10-21 secbelieved n
Be-144.4 msβ-
 
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
Format
mla apa chicago
Your Citation
Helmenstine, Anne Marie, Ph.D. "Beryllium Isotopes." ThoughtCo, Feb. 6, 2017, thoughtco.com/beryllium-isotopes-603868. Helmenstine, Anne Marie, Ph.D. (2017, February 6). Beryllium Isotopes. Retrieved from https://www.thoughtco.com/beryllium-isotopes-603868 Helmenstine, Anne Marie, Ph.D. "Beryllium Isotopes." ThoughtCo. https://www.thoughtco.com/beryllium-isotopes-603868 (accessed January 19, 2018).