Resonances in ~(12)C and Their Breakup to the 3α Final State

摘要

The breakup of ~(12)C states into three α-particles is discussed in the context of the continuum three-body problem. New information from the β-decay of ~(12)N populating 0~+, 1~+, and 2~+ states in ~(12)C is presented. The breakup mechanism of the 1~+ state at 12.71 MeV is clarified, the spin of the "10.3 MeV state" is determined as 0~+, and evidence for a previously unknown 2~+ state at 14.1(2) MeV is given.