Coulomb excitation with radioactive nuclear beam of 64Cu

Abstract The radioactive nuclear beam of 64 Cu was obtained utilizing a two-stage method at the HI-13 tandem accelerator of China Institute of Atomic Energy. The B (E2) value of the first excitation state of 64 Cu has been directly measured for the first time by Coulomb excitation method, using the radioactive nuclear beam of 64 Cu. An upper limit of the B (E2;2 1 + →1 gs + ) value from the first excitation state to the ground state of 64 Cu is determined to be 49 W.u., which is significantly smaller than 250±170 W.u., the value adopted by Nuclear Data Sheets. The reliability of the experimental method was verified by simultaneously performing the Coulomb excitation experiment of 181 Ta.