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In the framework of the two proton radioactivity studies, a Time Projection Chamber was recently developed at CENBG, in order to study the correlations between the two protons emitted. In fragmentation experiments performed at LISE3/GANIL, the 2p radioactivity of 45Fe and 54Zn was directly observed with the TPC. Results on correlations between the two protons are presented and compared to a recent theoretical model. [ABSTRACT FROM AUTHOR]

The half-lives of 38Ca and 39Ca have been measured at ISOLDE of CERN. The REXTRAP facility was used to prepare ultra-clean samples of radioactive nuclei for precision decay spectroscopy. 38Ca is one of the Tz = - 1 , 0+ $ \rightarrow$ 0+ $ \beta$ -emitting nuclides used to determine the vector coupling constant of the weak interaction and the Vud quark-mixing matrix element. The result obtained, T1/2 = 443.8(19) ms, is four times more precise than the average of previous measurements. For 39Ca , a half-life of T1/2 = 860.7(10) ms is obtained, a result in agreement with the average value from the literature. [ABSTRACT FROM AUTHOR]

In an experiment performed at the Accelerator Laboratory of the University of Jyväskylä, the ß-decay half-life of62Ga has been studied with high precision using the IGISOL technique. A half-life ofT1/2 = 116.09(17) ms was measured. Using ß-? coincidences, the ? intensity of the 954 keV transition and an upper limit of the ß-decay feeding of the 0+2 state have been extracted. The present experimental results are compared to previous measurements and their impact on our understanding of the weak interaction is discussed. [ABSTRACT FROM AUTHOR]