Cantonet al.Reply:

Abstract

Canton et al. Reply: In the preceding Comment, Fortune and Sherr (FS) agree with our prediction on the existence of three narrow odd-parity resonances in 15 F, finding them within the same excitation range and having the same spinparity and level ordering. Their argument, based upon a very different approach from ours, concerns some differences in the resonance centroids and widths. They conclude that the energies and widths of these narrow resonances might be considerably different from what we found.FS comment first on the energy centroids of the three narrow resonances. As the relevant question has been addressed in our Letter [1], we only remind readers that the energies of these narrow states are shifted higher from the results obtained by including the pure Coulomb effects to the mirror states in 15 C. The central term of the p-14 O nuclear potential required a shift of 0.8 MeV (with respect to the n-14 C potential) to find the appropriate centroid and width values of the 1 2

Observation of narrow states in nuclei beyond the proton drip line:F15andNe16Mukha1, Timofeyuk2, Sümmerer3 et al. 2009Phys. Rev. C4313491View full textAdd to dashboardCite

“…Thus, the odd-parity 15 F states may not be as narrow as predicted in Refs. [6,7]. Such a phenomenon may be general for nuclei beyond the proton drip line, where 1p and 2p thresholds are very low.…”

“…Recently, Canton et al [6] suggested that some unbound states could exist as very narrow resonances. Using multichannel algebraic scattering (MCAS) theory, Canton et al predicted three odd-parity states in 15 − , with the widths of only a few keV.…”

“…(i) The 15 F odd-parity states predicted by both Refs. [6] and [7] lie in the vicinity of the 2p threshold. Therefore, three-body 13 N + p + p dynamics, which cannot be taken into account by either the shell model or the MCAS, may strongly influence their properties.…”

The spectra of exotic light mass nuclei determined with MCAS theory

“…15 F is one such case [3]. The A = 7 system also has been considered with a unique nuclear potential, and the level structures of 7 He, 7 Li, 7 Be, and 7 B have been obtained [2].…”

“…We have also used the scheme to consider low energy properties of 3 H-and 3 He- 4 He scattering to correlate different views of the spectra of 7 Li and 7 Be. The di-cluster structure of 7 Be that results has then been used to evaluate the astrophysical S-factor for the radiative capture of 3 He by 4 He.…”