Étude par la voie 18O+ α de niveaux excités entre 11,7 et 13,0 MeV dans 22Ne

Investigation of theα-cluster structure ofNe22andGoldberg1, Rogachev2, Trzaska3 et al. 2004Phys. Rev. C532230View full textAdd to dashboardCite

“…The anomaly at 180°corresponds to a stronger resonance than reported in Ref. [19,20]. However, the precision of the parameter determination is not certain due to the very high sensitivity of the calculations to the beam energy spread in the gas.…”

“…The inset (b) gives the excitation function reported in Ref. [20] in comparison with the corresponding region of excitation function determined in the present experiment. The continuous lines show the results of the best fits to both works (see below).…”

“…The influence of the lower-energy resonances on the parameters of the 11.88 MeV resonance was checked. Inclusion of the closest strong 1 − resonance at 11.76 MeV [19,20] has only a minor effect.…”

“…[18]. The present work concentrates on a detailed comparison of data in the region a few MeV above the ␣ decay threshold in 22 Ne with existing data obtained by conventional methods [19,20]. It is well known that ␣ capture by 18 O plays an important role in astrophysics [21].…”

“…A very clear and beautiful picture of quasirotational bands of levels with large ␣-particle reduced widths was found in these nuclei, which manifested a molecular structure of cluster levels. The data on 20 Ne have been reviewed by Richards [7], who grouped the levels into several cluster bands. It was shown that the 0 − band was characterized by an extremely large reduced width for ␣ decay to the ground state of 16 O.…”