γ-ray decay of the 9.042 and 9.806 MeV states inNa23

The

{}^{12}C ({}^{12}C, p γ) {}^{23}{Na}

reaction, at an incident energy of

E_{c . m .} = 19.3

MeV, has been used to study the

γ

-ray decay of the 9.042 and 9.806 MeV levels in

{}^{23}{Na}

, which are resonantly excited at this energy. Doppler shift attenuation measurements have yielded lifetime limits of

τ < 10

fs for the 9.042 MeV level and

τ < 20

fs for the 9.806 MeV level. Angular distributions of the

γ

rays deexciting these two levels have been measured, and the results are consistent with the assumption of

J = \frac{15}{2}

and

J = \frac{17}{2}

, respectively. The measurements indicate that these two levels are likely candidates for the

{\frac{15}{2}}^{+}

and

{\frac{17}{2}}^{+}

members of the ground state rotational band in

{}^{23}{Na}

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