γ-ray spectroscopy of theA=23,T=1/2nuclei

Three New Low-Energy Resonances in theNe22(p,γ)NaCavanna1, Depalo2, Aliotta3 et al. 2015Phys. Rev. Lett.6255801View full textAdd to dashboardCite

“…The corresponding 23 Na excitation energies are consistent with, but more precise than, the literature values [30,35] (Fig. 2) at 9-53 keV distance in an area without other suspected resonances and with a low beam-induced background.…”

“…For these two states, only limited angular distribution data were available in the indirect works [29], hampering their interpretation. Indeed, new spin-parity values reported recently [30] are somewhat different from those in Ref. [29].…”

“…The spin-parity of the resonances shown here is partly still under study [30]; therefore. theoretical predictions of the angular distributions are fraught with uncertainty.…”

“…Only one direct experiment is reported in the literature [27], and it shows only upper limits for the resonance strengths. Indirect data are also available [28][29][30], but their interpretation relies on spin parity assignments or spectroscopic factor normalizations, which are often uncertain. As a result, the mere existence of the resonances at E res p ¼ 71, 105, and 215 keV is still under debate [28,29].…”

Direct measurement of low-energyNe22(p,γ)Na23resonances

“…For the resonances below 400 keV, however, data are scarce. The 23 Na states between E x = 8822-9171 keV have been studied with indirect techniques [17][18][19], but in many cases the spin and parity assignments to those levels are uncertain and their γ decay modes are poorly known, if at all. Direct [20] and indirect [17,18] experiments have been performed to derive the strength of 22 Ne(p,γ) 23 Na resonances below 400 keV, but both approaches only provided upper limits (tab.…”