A chain of four odd-odd proton emitters ( Tm, Lu, Ta and Re ) has been established from Z=69-75, representing the heaviest region in which proton radioactivity has been identified. This also clearly shows that the proton drip-line has been crossed up to Z=75. The results indicate that there is a reversal in the d and h proton orbitals around Z=73. Proton separation energies are compared with mass model predictions.
|Number of pages||4|
|Journal||Nuclear Physics A|
|Publication status||Published - 1 Mar 1993|