Na18: Mass excess and low-lying states

Abstract

We present estimates of the mass excess of 18 Na and properties of some of the low-lying states, using information from the mirror nucleus 18 N for guidance. We offer explanations for three peaks observed in 18 Na → 17 Ne + p decay.

Mg19two-proton decay lifetime

“…scale (t < ∼10 −15 s) well below our experimental sensitivity, contributed to the observed 17 Ne yield: the 2p1n breakup of the 20 Mg secondary beam, the 1p1n breakup followed by prompt proton emission from unbound 18 Na [16,21,22], and sequential 1p emissions of 19 Mg excited states through broad resonances in 18 Na. Furthermore, the 20 Mg beam had sufficient energy to pass unreacted through the target and undergo knockout reactions on the DSSD.…”