[en] Using Green's function techniques, the authors derive expressions for the width of a proton decaying state in spherical and deformed nuclei. The authors show that the proton decay widths calculated by the exact expressions of Maglione et al. are equivalent to the distorted wave expressions of Bugrov et al., and that of angstrom berg et al. in the spherical case

[en] We discuss new theoretical results on the decay of deformed and near-spherical nuclei. We interpret the latest experimental results on deformed odd-A proton emitters, including fine structure, and discuss the use of particle-vibration coupling to calculate the decay rates of near-spherical emitters

[en] In a recent experiment to study the proton radioactivity of the highly deformed ¹³¹Eu nucleus, two proton lines were detected. The higher energy one was assigned to the ground-state to ground-state decay, while the lower energy, to the ground-state to the 2⁺ state decay. This constitutes the first observation of fine structure in proton radioactivity. With these four measured quantities, proton energies, half-life and branching ratio, it is possible to determine the Nilsson configuration of the ground state of the proton emitting nucleus as well as the 2⁺ energy and nuclear deformation of the daughter nucleus. These results will be presented and discussed

[en] A kinematically complete measurement was made of the Coulomb dissociation of ⁸B nuclei on a Pb target at 83MeV/nucleon. The cross section was measured at low relative energies in order to infer the astrophysical S factor for the ⁷Be( p,γ)⁸B reaction. A first-order perturbation theory analysis including E1 , E2 , and M1 transitions was employed to extract the E1 strength relevant to neutrino-producing reactions in the solar interior. By fitting the measured cross section from E_rel=130 to 400keV, we find S₁₇(0)=17.8^+1.4_-1.2 eV b

No abstract available

[en] A new more precise measurement of the ground-state proton decay of ¹¹⁷La is presented [E_p=806(5) keV, t_1/2,p=26(3) ms]. ¹¹⁷La was produced via the p4n fusion-evaporation channel by bombarding a ⁶⁴Zn target with 310 and 295 MeV ⁵⁸Ni beams. The proton decay rate is consistent with emission from a prolate deformed 3/2⁺ or 3/2^- Nilsson state. No evidence is found for a previously reported proton decay from a high spin isomer in ¹¹⁷La. An upper limit for the production cross section for proton decay of ¹¹⁶La at a bombarding energy of 325 MeV was established

[en] Rotational bands feeding the ground state and the isomeric state in the proton emitter ¹⁴¹Ho were observed using the recoil-decay tagging method. This constitutes direct evidence that ¹⁴¹Ho is deformed. A quadrupole deformation of β₂=0.25(4) was deduced for the ground state from the extracted dynamic moment of inertia. Based on observed band crossings and signature splittings the 7/2^-[523] and 1/2⁺[411] configurations were proposed for the ground state and the isomeric state, respectively. Comparison with particle-rotor calculations for β₂=0.25 indicates, however, that ¹⁴¹Ho may have significant hexadecapole deformation and could be triaxial in the 7/2^-[523] ground state

No abstract available

[en] The 270-MeV ⁵⁸Ni+¹⁰²Pd reaction was used for the first recoil-decay tagging measurement with Gammasphere coupled to the Fragment Mass Analyzer at Argonne National Laboratory. Level structures of ¹⁵⁵Yb, ¹⁵⁶Lu, and ¹⁵⁷Lu, as well as the excited states associated with the 25/2^- isomer in ¹⁵⁵Lu, are identified for the first time. The systematical behavior of the energy levels is compared with that of neighboring isotones and isotopes. The attractive interaction between h_11/2 protons and h_9/2 neutrons plays an important role in the structure of ¹⁵⁵Yb and ^155,156Lu

No abstract available