Multichannel R-matrix analysis of elastic and inelastic resonances in the 20,21Na+p compound systems

• Published in: Nuclear physics. A Vol. 758; pp. 166 - 169
• Main Authors: Ruiz, C., Aliotta, M., Azuma, R.E., Boyd, R.N., Buchmann, L., Chen, A., Clarke, N.M., D'Auria, J.M., Davinson, T., Fulton, B.R., Groombridge, D., Hutcheon, D., Laird, A.M., Murphy, A.S., Pearson, J., Roberts, I., Robinson, A., Sarazin, F., Shotter, A.C., Walden, P., Woods, P.J.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2005
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2005.05.171

Resonant scattering studies were performed using radioactive 20,21Na beams at ISAC between energies of 0.5 keV/u and 1.5 keV/u. Intensities of up to 1 × 10 8 /sec were used with thick CH 2 targets, and elastic and inelastic proton resonances were observed corresponding to states in 21,22Mg by detecting recoil protons using the LEDA silicon array. A multichannel R-Matrix formalism was used to fit the excitation functions leading to the deduction of partial widths and spin-parity assignments. In certain cases definite spin-parity assignments could be made without fitting angular distributions due to the constraining nature of Coulomb-interfering resonances. Where possible, analogue assignments are made in the A=22, T=1, system based on the 21Na+p analysis.