Formation of the ground and 4.76-MeV Ne'4 states is characterized by 1=0 transfer, which establishes J =0+ for these two states. The J=2, 3.87-MeV state was observed to be formed via l=2 transfer, and so even parity is indicated for this state. Proton-y angular-correlation experiments were carried out in method II geometry at 8&=3. 45 and 3.33 MeV. These results establish unambiguous J=4 and 2 assignments for the respective 3.96and 5.58-MeV levels of Ne'4. The present experimental information on the static properties of Ne is shown to be consistent with a j-j coupling-model representation involving pure twobody proton condgurations. An intercomparison of the observed static properties associated with the low-lying levels of the even-A neon isotopes is presented, and a remarkable similarity is shown to exist between the low-lying level structures of 0" and Ne". It is concluded that 1dsg~subshell closure effects underlie the Ne" spectrum.(and perhaps nine) states in Ne 4 below E, =6.04 MeV via magnetic-spectrograph studies at a fixed angle (8~=90') with energy resolution of &20 keV; (b) Becker, Chase, McDonald, and Warburton' have further established both static and dynamic properties for the 1.99-, 3.87-, and 4.76-MeV Ne'4 levels. This previously available information is summarized in Fig. 1.The present work is primarily concerned with the four Ne" states between E,=3.96 and 5.58 MeV.
Angular-distribution measurementswere carried out on the protons from the Ne" (1, P) Ne'4 reaction studied at E& --3.30 MeV and are reported in Sec. II. Protongamma angular-correlation studies were performed on the Ne" (1 Py) Ne" reaction at 8, = 3.45 and 3.33 MeV, and these experiments are presented in Sec. III. The implications associated with the known information on this T, = 2 member of the A = 24 system are discussed in Sec. IV, in which a comparison is also made involving the known static properties of the low-lying levels of the even-A neon isotopes.
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