Observation of bound and unbound 1? states in 208Pb by particle spectroscopy

11th International Spring Seminar on Nuclear Physics: Shell Model and Nuclear Structure – achievements of the past two decades

Heusler, Andreas^1

Gustav-Kirchhoff-Strasse 7/1, Heidelberg

69120, Germany^1

关键词: Isobaric analog;    Magnetic spectrographs;    Mean distances;    Nonresonant;    Particle spectroscopies;    Residual interactions;    Shell models;    Single configuration;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/580/1/012021/pdf
DOI  :  10.1088/1742-6596/580/1/012021

来源: IOP

【 摘 要 】

Using the Q3D magnetic spectrograph of the Maier-Leibnitz-Labaratorium at Garching (Germany), experiments on the208Pb(d,d'), the207Pb(d,p), the resonant and the non-resonant208Pb(p,p') reactions were performed. The208Pb(p,p') reaction was investigated near all seven known isobaric analog resonances in209Bi. The excitation energies of about 300 states in208Pb at Ex 208Pb is about 10keV up to the neutron threshold (S(n) 7368 keV). The number of 1-states observed by particle spectroscopy up to the proton threshold (S(p) 8.00 MeV) is close to the number predicted by the schematic shell model without residual interaction. The structure of several 1-states is deduced from particle spectroscopy. Four out of the seven lowest 1-states contain about 80% strength of a single configuration.