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AbstractAbstract
[en] The general properties of the nucleus-nucleus collisions in the GeV/A range are reviewed. It is shown that, despite of the very transient nature of the process, some observable quantities are linked with the formation of a dense, very excited state of the matter. It is not, however, quite clear wether these quantities are relevant for the bulk properties of the matter. The questions of the pion multiplicity and the deuteron to proton ratio are analyzed. The equation of state is tentatively derived for some values of the thermodynamical variables
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Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. C9.1-C9.13; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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Bovet, E.; Antonuk, L.; Egger, J.P.; Fiorucci, G.; Gabathuler, K.; Gimlett, J.
8. Biennial session on nuclear physics1985
8. Biennial session on nuclear physics1985
AbstractAbstract
No abstract available
Original Title
Mesure du deplacement d'interaction forte dans les atomes π-H et π-D a l'aide d'un spectrometre
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Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. S5.1-S5.3; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985; Published in summary form only.
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AbstractAbstract
[en] The colour dielectric quark model relating nuclear binding to the spread of the quark wave functions is applied to calculate the charge symmetry breaking in mirror nuclei. We parametrize the mass difference of mirror nuclei (1/2Tsub(z)(M(Z,N) - M(N,Z) in the form a + bAsup(2/3). The first term is given by the colour dielectric model as proportional to the quark mass difference msub(d) - msub(u) = 2.5 MeV; the second is related to the difference of Coulomb energies in the mirror nuclei
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Source
Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. C19.1-C19.7; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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AbstractAbstract
[en] Some attractive properties of the kaon interaction with nuclei are emphasized and their interest as probes of nuclear structure is shown. The multiple scattering mechanism K+ K- is analysed and the theoretical predictions are compared with the data obtained recently at Brookhaven
[fr]
On degage certains aspects originaux de l'interaction des kaons avec les noyaux et on montre l'interet de telles sondes pour l'etude de la structure nucleaire. Le mecanisme de diffusion multiple de K+ et K- est egalement analyse et les predictions theoriques sont comparees aux donnees experimentales obtenues recemment a BrookhavenOriginal Title
Diffusion de kaons et structure nucleaire
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Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. C1.1-C1.14; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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AbstractAbstract
[en] The high energy response of nuclei to a spin-isospin excitation is investigated. We predict the existence of a strong contrast between the spin transverse and spin longitudinal responses. The second one undergoes a shadow effect in the Δ region and displays the occurence of the pionic branch
[fr]
On recherche la reponse des noyaux a une excitation spin-isospin a haute energie. Nous predisons l'existence d'un contraste important entre les fonctions de reponse des spins transverse et longitudinal. Le second subit un effet d'ombre dans la region Δ ce qui est du a l'apparition de la branche pioniqueOriginal Title
Modes de spin-isospin a haute energie dans les noyaux
Primary Subject
Source
Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. C5.1-C5.10; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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[en] The results of a few experiments on fragmentation in heavy ion collisions at intermediate energy are reviewed. Two distinct fragmentation processes are considered: projectile fragmentation in peripheral collisions and nuclear fragmentation or multifragmentation in central collisions
[fr]
Les resultats de quelques experiences concernant la fragmentation dans les collisions d'ions lourds aux energies intermediaires sont examines. On distingue deux processus de fragmentation: la fragmentation du projectile qui intervient dans les collisions peripheriques et la fragmentation nucleaire ou multifragmentation associee aux collisions centralesOriginal Title
Processus de fragmentation dans les collisions d'ions lourds au voisinage de l'energie de Fermi
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Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. C18.1-C18.24; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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AbstractAbstract
[en] The first results of an experiment done at GANIL show that at 35 MeV/A most of the inelastic channels of the Ar+Ag system lead to multibody final states: the quasi two body cross sections (deep inelastic process, fusion/fission) have been found negligible. A light nuclei multidetector is used to study coincidences between projectile-like and light particles for the projectile fragmentation reaction
[fr]
Les premiers resultats d'une experience effectuee a GANIL montrent qu'a 35 MeV/A les interactions inelastiques du systeme Ar+Ag conduisent essentiellement a des multicorps: les sections efficaces des voies a quasi deux corps (deep inelastic, fusion/fission) ont ete trouvees negligeables. L'utilisation d'un multidetecteur de noyaux legers vers l'avant nous a permis de plus d'etudier les coincidences quasi projectile/particules dans la zone de fragmentation du projectileOriginal Title
Etude de la reaction Ar+Ag a 35 MeV/A
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Source
Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. S1.1-S1.7; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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[en] Experimental results for neutron emission in heavy ion collisions in an energy range between 10 to 100 MeV/A are reviewed. In the moving source description the evolution of the equilibrated and non equilibrated components are discussed
[fr]
On passe en revue des resultats experimentaux relatifs a la detection des neutrons emis dans les collisions d'ions lourds dans le domaine de 10 a 100 MeV/A. On discute sur les parametres relatifs a la description de la source mobile (emission equilibree et non equilibree)Original Title
Emission de neutrons et de particules legeres dans les collisions d'ions lourds
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Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. C12.1-C12.14; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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Chavallier, A.; Chevallier, J.; Debeauvais, M.; Pape, A.; Andriambolona, R.; Rakotoson, G.; Stephan, C.; Tys, J.
8. Biennial session on nuclear physics1985
8. Biennial session on nuclear physics1985
AbstractAbstract
[en] Six-branched stars (including one short branch) have been observed in nuclear emulsions impregnated with chemical fractions of monazite. Also low-energy α-particle groups not corresponding to known emitters have been seen in Si spectra of monazite and hematite. An experiment in which magnetic mass separation was performed showed a non-identified α-radioactivity at mass 239
[fr]
Dans les emulsions nucleaires impregnees d'une fraction chimique de monazite des ''etoiles a 6 branches'' presentant une branche courte ont ete observees. Les spectres de particules α obtenus a l'aide de detecteurs Si a partir d'echantillons de monazite et d'hematite montrent l'existence de groupes de particules α de faible energie ne correspondant pas a des emetteurs connus. Une experience effectuee par separation magnetique de masse a permis de mettre en evidence une masse 239 radioactive α non identifieeOriginal Title
Les emissions non identifiees dans les radioactivites naturelles
Primary Subject
Source
Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. S16.1-S16.8; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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AbstractAbstract
[en] Coulomb repulsion causes an instability in hot compound nucleus when its temperature is raised beyond a certain limiting value. In the framework of a finite temperature version of the liquid drop model, we establish the relation between this instability and the liquid gas phase transition in hot nuclear matter. This limiting temperature depends upon the critical temperature but is always below. It also depends upon the charge and the mass of the nucleus and is very sensitive to the characteristic of the hot matter and its surface tension
[fr]
La repulsion coulombienne provoque l'instabilite des noyaux composes quand la temperature depasse une certaine valeur limite. Dans le cadre du modele de la goutte liquide a temperature finie, nous avons montre la relation entre cette instabilite et la transition de phase liquide gaz dans la matiere nucleaire infinie. Cette temperature limite depend de la temperature critique mais lui reste toujours inferieure. Elle depend aussi de la charge et de la masse du noyau etudie et est tres sensible aux caracteristiques de la matiere nucleaire a temperature finie et de la tension superficielleOriginal Title
Stabilite des noyaux chauds
Primary Subject
Source
Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire; 362 p; 1985; p. C4.1-C4.16; 8. Biennial session on nuclear physics; Aussois (France); 4-8 Feb 1985
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