Observation of the exotic nucleus [Formula Presented] via its direct proton decay
Proton emission from [Formula Presented] was observed for the first time via the [Formula Presented] reaction, using the Holifield Radioactive Ion Beam Facility Recoil Mass Spectrometer in conjunction with a double-sided Si strip detector at the focal plane. The measured energy of the emitted proton is 1.728(10) MeV and its half-life is 3.5(10) μs, the shortest ever observed for ground-state proton radioactivity. When compared to the calculated WKB half-life for an [Formula Presented] transfer, the spectroscopic factor is 0.51(16), which is consistent with the value of 0.64 calculated via the BCS approximation for a spherical nucleus. Also, the half-life of [Formula Presented] was determined with a greater precision than previously available to be 16.7(7) μsec. © 1998 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review C - Nuclear Physics
Batchelder, J., Bingham, C., Rykaczewski, K., Toth, K., Davinson, T., McKenzie, J., Woods, P., Ginter, T., Gross, C., McConnell, J., Zganjar, E., Hamilton, J., Walters, W., Baktash, C., Greene, J., Mas, J., Milner, W., Paul, S., Shapira, D., Xu, X., & Yu, C. (1998). Observation of the exotic nucleus [Formula Presented] via its direct proton decay. Physical Review C - Nuclear Physics, 57 (3), R1042-R1046. https://doi.org/10.1103/PhysRevC.57.R1042