The lifetimes of the first excited 2 þ states in the N ¼ Z nuclei 80 Zr, 78 Y, and 76 Sr have been measured using the γ-ray line shape method following population via nucleon-knockout reactions from intermediateenergy rare-isotope beams. The extracted reduced electromagnetic transition strengths yield new information on where the collectivity is maximized and provide evidence for a significant, and as yet unexplained, odd-odd vs even-even staggering in the observed values. The experimental results are analyzed in the context of state-of-the-art nuclear density-functional model calculations.

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. While 3,3-dimethylbicyclo[3.3. Ilnonan-2-one (5) is stable under strongly basic conditions (1-BuO-/t-BuOH/l85"C), its isomer, 3,3-dimethylbicyclo[3.2.2]nonan-2-one (6), is slowly transformed to 5. Similarly, 3,3-dimethylbicyclo-[3.2.2]non-6-en-Zone (8b) rearranges to a [3.3.1] isomer but the latter is not stable. Experiments with 3,3-dimethylbicyclo[3.3.l]non-6-en-2-one (7) revealed that it is converted to five compounds, none of which is 8b. The major product, Des expkriences rCalisCes avec le cornposC 11 uniquement rCvklent que la transposition p-Cnolate 7 + 11 est unidirectionnelle. Le clivage HallerBauer en produits acides intervient comme un processus mineur dans les rCactions des cCtones insaturCes. On a Ctabli la structure des produits principalement ii partir de leurs spectres de rCsonnance magnCtique nuclCaire du 'H et du '2.

We present a new statistical tool based on random sampling to assess the confidence interval of Pearson's and Spearman's correlation coefficients. These estimators are then used to quantify the statistical correlations among the neutron skin thickness of atomic nuclei and the slope of the symmetry energy in the infinite nuclear medium.

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