Competitive and successive reactions in the position cluster and energy state of positronium in the liquids; Reactions competitives et successives dans la grappe du positon et etat energetique du positonium dans les liquides Didierjean, F 74 ATOMIC AND MOLECULAR PHYSICS; POSITRONS; ANNIHILATION; POSITRONIUM; ENERGY LEVELS; ELECTRON CAPTURE; INHIBITION; PARTICLE PROPERTIES; MAGNETIC FIELDS; CLUSTER MODEL; SOLVENTS; LIQUIDS; SODIUM 22; CHEMICAL REACTIONS; HALIDES; NITRATES; 664300; 664500; COLLISION PHENOMENA; SPECIAL ATOMS AND MOLECULES By combining two independent positron annihilation techniques, it is shown that, in polar solvents, the halogenated compounds inhibit positronium formation by quasi-free electron scavenging followed by positron capture. This sequence occurs before halide detachment intervenes. Studying mixtures of solutes allows both to confirm the existence of these successive reactions and to stress the influence, towards positronium formation, of the trap depth for the electron captured by nitrates, whether ion associated or not, in methanol. Finally, experiments in the presence of a magnetic field allow to conclude that the formed positronium is very rapidly thermalized, then localised in a potential well in the liquids, the so-called bubble. Strasbourg-1 Univ., 67 (France). Centre de Recherches Nucleaires; Strasbourg-1 Univ., 67 (France) OSTI; NTIS (US Sales Only); INIS France 1991-10-01 French Thesis/Dissertation Technical Report Other Information: TH: These (D. es Sc.); PBD: Oct 1991 Medium: X; Size: 175 p. https://doi.org/ ON: DE92526927 [] CRN-CPR-91-05 Other: ON: DE92526927; TRN: FR9200967 FRN; SCA: 664300; 664500; PA: FRD-92:000967; SN: 92000757222 2008-02-12 10149546