Physics – Nuclear Physics
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977nupha.276..168b&link_type=abstract
Nuclear Physics A, Volume 276, Issue 1, p. 168-188.
Physics
Nuclear Physics
7
Nuclear Reactions
Scientific paper
Excitation curves for the 21Ne(p, γ)22Na, 21Ne(p, p'γ)21Ne and 21Ne(p, p)21Ne reactions have been obtained for Ep = 0.4-1.6 MeV. Neon gas enriched to 92 % in 21Ne was recirculated in a differentially pumped gas target system. The fifteen previously reported (p, γ) resonances were established and nineteen new (p, γ) resonances found. Anomalies in the elastic scattering yield were observed for fourteen resonances. The reported state at Ex = 7278 +/- 7 keV in 22Na was resolved into a doublet separated by 1 keV. All unbound states in 22Na, observed previously in other reactions, have been confirmed as resonance states in the energy range covered, with the exception of the Ex = 7942 +/- 7 keV state. The new Ep = 663, 694, 1235, 1432 and 1543 keV resonances correspond to new unbound states in 22Na. Excitation energies, γ-ray decay schemes, resonance widths and strengths as well as limits on Jπ assignments are reported for all the resonances. From the Coulomb excitation of the Ex = 350 keV, first excited state in 21Ne a value of B(E2) = 0.014 +/- 0.002 e2 . b2 is deduced. The astrophysical as well as the nuclear structure implications of the present results are discussed.
Supported in part by NSF institutional grant A 4162611-1975, California State University, Los Angeles.
Berg H. L.
Hietzke W.
Rolfs Claus
Winkler Heiner
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