More Chemistry
The very short-lived beryllium isotope with a mass of 7, with a half-life of approximately 53 days, only occurs on Earth in very small traces, namely as an atmospheric spallation product of oxygen and nitrogen due to the action of cosmic radiation.
The atomic nucleus of the nuclide with the formula 7Be consists of the 4 protons, which are element-specific for beryllium, and 3 neutrons.
There are practically no technical applications for this Be isotope.
See also: list of Beryllium isotopes.
74Be + e- → 73Li + γ | half-life = 53,22 days.
The gamma radiation (gamma quantum γ per decay) has an energy of 477.6035(20) keV; Intensity 10.44(4)%, dose 0.04989(19) MeV/Bq-s.
Half-life T½ = 53.22(6) d respectively 4.598208 × 106 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|---|---|---|---|
EE | 7Li | 100 % | 0.86189(7) MeV | 477.6035(20) keV 10.44(4) % |
OZ | Isotone N = 3 | Isobar A = 7 |
---|---|---|
1 | 4H | 7H |
2 | 5He | 7He |
3 | 6Li | 7Li |
4 | 7Be | 7Be |
5 | 8B | 7B |
6 | 9C | |
7 | 10N | |
8 | 11O |
[1] - T. Ohtsuki, H. Yuki, M. Muto, J. Kasagi, K. Ohno:
Enhanced Electron-Capture Decay Rate of 7Be Encapsulated in C60 Cages.
In: Physical Review Letters, 93, 112501, (2004), DOI 10.1103/PhysRevLett.93.112501.
[2] - M. Yoshimori:
Production and behavior of beryllium 7 radionuclide in the upper atmosphere.
In: Advances in Space Research, (2005), DOI 10.1016/j.asr.2005.04.093.
[3] - L. Damone et al.:
7Be (n,p)7Li Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN.
In: Physical Review Letters, (2018), DOI 10.1103/PhysRevLett.121.042701.
Last update: 2023-10-22
Perma link: https://www.chemlin.org/isotope/beryllium-7
© 1996 - 2024 ChemLin