15N( overlinep, po) 15N and the levels of 16O for Ex = 14.8-18.6 MeV
Abstract
Angular distributions of cross section and analyzing power for elastic scattering of protons from 15N have been measured for Ep = 2.7-7.0 MeV. A phase-shift analysis of the data yields spin-parity assignments and level parameters for seventeen states of 16O in the excitation energy region 14.8-18.6MeV. Three of the resonances have not previously been identified, among them being a broad Jπ = 2 - level at Ep = 6.1 MeV which is almost certainly the analog of the 2 - 1p1h state with configuration ( d{3}/{2}, p{1}/{2}-1) at Ex ∽ 5.0 MeV in 16N. The broad level previously reported near Ep = 5.0 MeV has been observed and its parameters determined. A resonance analysis of the phase shifts yielded values of Er, Γ and Γp for all of the levels. The Jπ assignments are in agreement with previously reported values. For resonances having J = l, the data can usually be fit with a resonant phase shift corresponding to either J = l + 1 or J = l - 1, in addition to the phase shift for J = l. Which of the two spurious- J solutions occurs seems to depend on whether the partial wave through which the resonant state is formed is J = l + {1}/{2}or J = l - {1}/{2}.
- Publication:
-
Nuclear Physics A
- Pub Date:
- November 1984
- DOI:
- 10.1016/0375-9474(84)90206-9
- Bibcode:
- 1984NuPhA.429..218D