Abstract
The reactions 21Ne(p, γ) 22Na and 22Ne(p, γ) 23Na have been investigated at E p(lab) = 70–355keV. Neon gas enriched to 91% in 21Ne and to 99% in 22Ne was recirculated in a differentially pumped gas target system of the extended-static and quasi-point supersonic jet type. For 21Ne(p, γ) 22Na, new resonances were found at E p = 126, 272, 291 and 352 keV. The 291 keV resonance corresponds to a new unbound state in 22Na. Excitation energies, γ-ray decay schemes, resonance widths and strengths as well as J π assignments are reported for all the resonances. Information on low-lying states in 22Na is also obtained. Of the 9 expected resonances in 22Ne(p, γ) 23Na none has been observed. Upper limits on their ωγy strengths are presented. The astrophysical as well as the nulcear structure aspects of the results are discussed.
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