Nuclear Data Sheets for A = 48

Proton spectroscopy ofNi48,Fe46, andCrPomorski1, Pfützner2, Dominik3 et al. 2014Phys. Rev. C761450View full textAdd to dashboardCite

“…Nonobservation of such a signature may indicate that either no protons were emitted in the decay or that the decay occurred after the decay gate was closed. Both possibilities are very unlikely, because the β daughter, 48 Co is proton unbound [35] and the 48 Ni half-life is much shorter that the decay gate (see below). It could happen, however, that the decay occurred within the first 100 µs after the implantation when the OTPC is still in the low sensitivity mode.…”

First observation of two-proton radioactivity inNi48

“…However, the β + decay daughter nucleus 48 Co is predicted to be proton unbound by more than 800 keV [2][3][4]. Moreover, the assumption of the mirror symmetry and the level scheme of 48 Sc [25] leads to the prediction that neither the ground state of 48 Co, expected to be 6 + , nor any low lying excited state could be fed by β decay of 48 Ni. Therefore, a β transition with no emission of at least one proton seems very unlikely, unless the mirror symmetry is seriously broken in this case.…”

Optimizing phonon space in the phonon-coupling model

“…Here we compared only the theoretical results for SV-bas with the data. For the spin-orbit splitting the agreement between theory and experimental data is good, with the exception of the proton 1f pair in 48 Ca. Also the energy gaps between the particle and hole spec- tra are well reproduced.…”

“…As the parity changes from shell to shell one obtains only low-lying (ph) pairs with negative parity. From 48 Ca on the spin-orbit splitting is so large that the lower partner of the first unoccupied shell is shifted beneath the Fermi edge in the next lower shell. The coupling of this hole state with the states of the same shell just above the Fermi edge gives rise to low-lying ph pairs with positive parity.…”