Nuclear structure of 18F: (V). A further study and summary of low-lying (2s, 1d)2 states

The 6164, 6284, 6310, 6383, 6480, 6777 and 6803 keV states have been studied via the capture reactions ¹⁴N(α, γ)¹⁸F and ¹⁷O(p, γ)¹⁸F. These studies yield respective assignments of J^πT = 3⁺(1), 2⁺(0+1), 3⁺(0), 2⁺(0+1), 3⁺(0), 4⁺(0) and 1⁺, 2 or 3⁺(0). Information on radiative widths, branching and multipole mixing ratios is reported. The 6164 and 6777 keV states are well described theoretically by simple $\text{(}\text{d}{}_{\mathrm{<mtext>5</mtext><mtext>2</mtext>}}\text{s}{}_{\mathrm{<mtext>1</mtext><mtext>2</mtext>}}\text{)}{}_3{}^{\mathrm{+}}\text{and}\text{(}\text{d}{}_{\mathrm{<mtext>5</mtext><mtext>2</mtext>}}\text{d}{}_{\mathrm{<mtext>3</mtext><mtext>2</mtext>}}{}_4{}^{\mathrm{+}}$ configurations, respectively. The 2⁺ states at 6284 and 6383 keV are mixed in isospin. A comparison of the observed properties with the available model calculations is presented for the above states as well as for some low-lying positive-parity states.