Widths and Spectroscopic Factors in ²¹O

A recent 20O(d,p)21O experiment, in reverse kinematics, discovered two new states in 21O at 4.77(10) and 6.17(11) MeV, with Jπ assignments of 3/2+ and of 3/2+ or 7/2−, respectively. Both widths and spectroscopic factors were reported, along with the branching ratio for the upper state to decay to the 2+ state of 20O. We have computed single-particle widths for all the relevant decays and have used them to extract additional information for these two states, including the spectroscopic factors for 2+ decay of the upper state with the two possible Jπ values. Our analysis prefers 7/2− for Jπ

Consistent Description of \u3csup\u3e11\u3c/sup\u3eBe and \u3csup\u3e12\u3c/sup\u3eBe and of the \u3csup\u3e11\u3c/sup\u3eBe(\u3cem\u3ed,p\u3c/em\u3e)\u3csup\u3e12\u3c/sup\u3eBe Reaction

Simple wave functions for 11,12Be have been around for a long time. They have been tested against many independent processes involving (and properties of) these nuclei. All are consistent, except 11Be(d,p), where the discrepancy is a 4.7σ effect for the 2+ state and 15σ for the ground state. Here, we propose a resolution to this dilemma

Structure of 2\u3csup\u3e+\u3c/sup\u3e, \u3cem\u3eT\u3c/em\u3e = 2 States in \u3cem\u3eA\u3c/em\u3e = 12 Nuclei

Using a reasonable but simple model, properties of 2+ states in 12Be and 12O are calculated and compared with results of experiments

Coulomb Energies in \u3csup\u3e16\u3c/sup\u3eNe and Low-lying levels of \u3csup\u3e17\u3c/sup\u3eNa

We have computed energies of 16Ne levels in a core plus two-nucleon space, using known 16C energies and existing wave functions. We have then used these energies to compute properties of the first three levels of 17Na. Significant differences are found with results of a recent microscopic-cluster-model formulation

Excited 0\u3csup\u3e+\u3c/sup\u3e, \u3cem\u3eT\u3c/em\u3e = 2 States in \u3csup\u3e12\u3c/sup\u3eBe, \u3csup\u3e12\u3c/sup\u3eC, and \u3csup\u3e12\u3c/sup\u3eO

We present predictions of a relatively simple model of the low-lying 0+ states in 12Be, their predicted energy splitting in 12O, their cross-section ratios in 10Be(t,p) and 14C(p, t) and their decay widths. Comparison is made with predictions using earlier wave functions of Barker

Two-Proton Decay Energy and Width of \u3csup\u3e19\u3c/sup\u3eMg(g.s.)

We use a weak-coupling procedure and results of a shell-model calculation to compute the two-proton separation energy of 19Mg. Our result is at the upper end of the previous range, but 19Mg is still bound for single proton decay to 18Na. We also calculate the 2p decay width

Binding energy of ²²C

The sensitivity of the calculated matter radius to the binding energy is exploited to estimate the 2n binding energy of 22C, using a recent experimental value of Rm=5.4(9) fm. The result is B2n \u3c 220 keV, significantly smaller than another recent estimate

Reexamining \u3csup\u3e18\u3c/sup\u3eNa and \u3csup\u3e19\u3c/sup\u3eMg

New results for energies of resonances in 18Na have led us to reexamine the problems of 18Na and 19Mg. We have calculated the effect of the new data on energy and decay width of 19Mg (ground state)

Neutron Widths and Configuration Mixing in \u3csup\u3e11\u3c/sup\u3eBe

We use known widths and branching ratios in 11Be to discuss Jπ and configuration admixtures. Analysis favors 3/2− for the 3.96-MeV state and three-state mixing for this Jπ