Thesis, University of Bordeaux (2017)

T.Goigoux

Study of ⁶⁷Kr two-proton radioactivity and development of a time projection chamber

RADIOACTIVITY ⁶⁷Kr(2p), (β⁺), ⁵⁷Zn, ^59,61Ge, ^63,65Se, ^68,69Kr(EC), (β⁺), (β⁺p), ^55,56Cu, ⁶⁰Ga, ⁶³Ge, ^64,65As, ⁶⁷Kr(EC), (β⁺)[from ⁹Be(⁷⁸Kr, X), E=345 MeV/nucleon, followed by separation of fragments using BigRIPS and ZerDegreeSpectrometer at RIBF-RIKEN]; measured E(p), I(p), Eγ, half-lives of decays of isotopes from time distribution of (fragment)(decay events) correlations using EURICA-WAS3ABi setup at RIKEN; deduced %2p for the decay of ⁶⁷Kr, and %β⁺p for ⁵⁷Zn, ^59,61Ge, ^63,65Se, ^68,69Kr. Comparison with previous experimental results. Discussed astrophysical implications for the rp process of nucleosynthesis.