Fine structure in proton emission with the branching ratio Ip=9.6±1.5% was discovered during the reinvestigation of the 3.1 μs activity of 145Tm. This observation was made possible by the development of the new technology of digital processing of detector signals. The slightly deformed shape of the 144Er potential tunneled by the emitted protons was inferred from the measured energy of 0.33 MeV for the 2+ state. The structure of the wave function of 145Tm and proton emission rates were analyzed within the models accounting for particle-core vibration coupling. The wave function was found to be dominated by the π0h11/2 orbital coupled to the 0+ ground state of the 144Er core and 2+ excited state of the core. The origin of the 1.40 MeV proton transition to the 2+ state was found in the small 3% π1f7/2⊕2+ component in the wave function.
|Journal||Physical Review Letters|
|Publication status||Published - 2003 Jan 10|
ASJC Scopus subject areas
- Physics and Astronomy(all)