Spectra and electromagnetic transitions of ^72-84Kr in the interacting boson model-1

Within the framework of the interacting boson model-1, the energy levels and electromagnetic transitions in ^72-84Kr isotopes are calculated. The structures of the eigenstate and Hamiltonian matrix for some low-lying states are also calculated. The calculated results are compared with available experimental data, and the results are generally in good agreement. The present study shows that the ^{72,74,76,80,82,84}Kr isotopes are in the transition from U(5) → SU(3), and ⁷⁸Kr is in the transition from U(5) → O(6). (authors)