Radioactivity of neutron deficient isotopes in the region N>82>Z

The α decay characteristics of 88 decay lines emanating from 74 isotopes are presented, including new α decay lines identified in the neutron deficient nuclides Ta (E=5969±8 keV, t=46±4 ms), Ta (E=5516±5 keV, t=1100±100 ms), Ta (Eα=5313±5 keV, t=1700±200 ms), Ir (E=6323 ±8 keV, t=161±21 ms, b=82±14%), and Ir (E=6083±11 keV, t=830±300 ms, b=36 ±10%). Their correlations with other decay lines are discussed. The alpha decay of a high-spin isomer in Ta has been discovered, with an energy of 7744±8 keV and a half-life of 1.7±0.1 ms, while the half-life of the corresponding isomeric alpha decay line of W has been measured for the first time as 160±50 μs. First half-life and branching ratio measurements are also reported for the 5454±4 keV Lu line (t=494 ±12 ms), Re (b=85±9%), Os (t=12 ms), Ir (t=12±1 ms), Ir (t=34±4 ms), the 6227 ±15 keV Ir line (t=125±40 ms), and Ir (b=58±11%). New decay measurements for the proton emitter Ta (E=1108±8 keV, t=375±54 ms, b=4.2±0.9%; E=1007±5 keV, t=144±24 ms) are presented. All energies have been measured using a consistent energy calibration procedure for protons and α particles.