No abstract available

[en] We investigate shape coexistence in a rotating nucleus. We concentrate on the case of ⁷²Kr which exhibits an interesting interplay between prolate and oblate shaped states as a function of angular momentum. The calculation uses the local harmonic version of the method of self-consistent adiabatic large-amplitude collective motion. We analyse how the collective behaviour of the system changes with angular momentum and we focus on the role of non-axial shapes

No abstract available

No abstract available

[en] Ever since its first observation in ⁷²Se, co-existence of two nuclear shapes is now a general phenomenon in A ∼ 80 mass nuclei. The shape structures are found to change with the addition of two protons or two neutrons. The potential energy surfaces are calculated for N=Z, ⁷²Kr to ⁹²Pd nuclei, in an axially deformed relativistic mean field (RMF) approach, using a quadratic constraint scheme

[en] It was observed that the shape isomerism in N=Z nucleus which at the same time supports the predicted scenario of oblate prolate shape co-existence in the medium mass region. ⁷²Kr seems to be one of the rarer nuclei with a rather pure oblate deformed ground state and the oblate-prolate shape mixing found in the Kr isotopes

[en] The purpose of the present work is to study the effects of neutron-proton pairing correlation in spontaneous breakdown of rotational symmetry in N = Z ⁷²Kr, ⁷⁶Sr and ⁸⁰Zr nuclei

[en] We report on the first measurement of the absolute transition strength B(E2;0₁⁺→2₁⁺) in the self-conjugate nucleus ⁶⁸Se. It is found that the 0₁⁺→2₁⁺ transition displays a strength similar to that for the triaxial ⁶⁴Ge nucleus, in sharp contrast to the much stronger collectivity observed for the oblate ⁷²Kr nucleus. Shape evolution along the N=Z line from zinc to strontium is analyzed through beyond-mean-field calculations using the D1S force. Over this narrow mass region the nuclear structure shows clear-cut transition from prolate to oblate and back to prolate, with ⁶⁸Se standing as pivotal between triaxial and oblate deformations.

No abstract available

[en] The mass of one of the three major waiting points in the astrophysical rp-process ⁷²Kr was measured for the first time with the Penning trap mass spectrometer ISOLTRAP. The measurement yielded a relative mass uncertainty of δm/m=1.2 x 10^-7 (δm=8 keV). Other Kr isotopes, also needed for astrophysical calculations, were measured with more than one order of magnitude improved accuracy. We use the ISOLTRAP masses of^72-74Kr to reanalyze the role of the ⁷²Kr waiting point in the rp-process during X-ray bursts. (orig.)