Two measurements of the 22Na+p resonant scattering via thick-target inverse-kinematics method

22 Na is an important isotope for the study of extinct radioactivity, meanwhile its sufficiently long half life provides the possibility to observe live 22 Na in nearby nova explosions. The 22 Na(p, γ ) 23 Mg is one of the key reactions that influence the 22 Na abundance in nova ejecta. To study the proton resonant states in 23 Mg relevant to the astrophysical 22 Na(p, γ ) 23 Mg reaction rates, two measurements have been carried out at the CRIB separator of University of Tokyo, and the RIBLL secondary beamline in Lanzhou, respectively. The 22 Na secondary beam was produced via the 1 H( 22 Ne, 22 Na)n charge exchange reaction. Thick-target inverse-kinematics method is applied to obtain the excitation function of 22 Na+ p elastic scattering. Extended gas target and solid state polyethylene foil were used in the two measurements, respectively, to map the different excitation energy region of the compound nucleus 23 Mg. Several new resonant levels are observed and their contribution to the 22 Na(p, γ ) 23 Mg reaction rate is evaluated.