Direct observation of $\beta$ and $\gamma$ decay from a high-spin long-lived isomer in ${}^{187}$Ta

J. L. Chen, H. Watanabe, P. M. Walker +20

${}^{187}$Ta ($Z=73$, $N=114$) is located in the neutron-rich $A\approx 190$ region where a prolate-to-oblate shape transition via triaxial softness is predicted to take place. A pr…