Alpha particles following the β-decay of 12B and 12N

✍ Scribed by D. Schwalm; B. Povh

• Publisher: Elsevier Science
• Year: 1966
• Weight: 559 KB
• Volume: 89
• Category: Article
• ISSN: 0029-5582
• DOI: 10.1016/s0029-5582(66)80101-3

✦ Synopsis

The 10.3±0.3 MeV state in 12C, populated by the fl-decay of ~B and 12N, decays by ~particle emission to the ground state of aBe; its width is 3.04-0.7 MeV. The population and decay of the 10.3 MeV state limit the spin to Jn = 0 + or 2 +. The 12.7 MeV state in 12C, populated by the fl-decay of ~N, decays by s-particle emission to the Jn : 2 + first excited state of 8Be. The formation and decay of the 12.7 MeV state uniquely determine the spin as Jn = 1 +. The estimated value of logft : 3.7 +o:~ for the fl-decay of 12N to the 12.7 MeV state suggests that this state is closely related to the ~N ground state.

RADIOACTIVITY 12B [from liB(d, p)], ~2N [from ~°B(3He, n)]; measured E~, c~c~-coin. ] E 12C deduced levels, /~, J, ~, log ft. Natural and enriched targets.