Boron-19 is a radioisotope of the chemical element boron, which has 14 neutrons in its atomic nucleus in addition to the element-specific 5 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 19. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of 19B is exclusively for academic purposes.
The discovery of the neutron-rich nuclide was reported in 1984 [1]. It was artificially produced by irradiating beryllium with a beam of accelerated iron-56 nuclei.
See also: list of Boron isotopes.
Half-life T½ = 2.92(13) ms respectively 2.92 × 10-3 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|---|---|---|---|
β-, n | 18C | 71 % | ||
β-, 2n | 17C | 17 % | ||
β- | 19C | > 2.9 % | ||
β-, 3n | 16C | < 9.1 % |
Z | Isotone N = 14 | Isobar A = 19 |
---|---|---|
5 | 19B | 19B |
6 | 20C | 19C |
7 | 21N | 19N |
8 | 22O | 19O |
9 | 23F | 19F |
10 | 24Ne | 19Ne |
11 | 25Na | 19Na |
12 | 26Mg | 19Mg |
13 | 27Al | |
14 | 28Si | |
15 | 29P | |
16 | 30S | |
17 | 31Cl | |
18 | 32Ar | |
19 | 33K | |
20 | 34Ca |
[1] - J. A. Musser, J. D. Stevenson:
First Observation of the Neutron-Rich Isotope 19B.
In: Physical Review Letters, 53, 2544, (1984), DOI 10.1103/PhysRevLett.53.2544.
[2] - J. Casal, E. Garrido:
Three-body structure of 19B: Finite-range effects in two-neutron halo nuclei.
In: Physical Review C, 102, 051304(R), (2020), DOI 10.1103/PhysRevC.102.051304.
Last update: 2024-09-23
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