Published 1986 | Version v1
Miscellaneous Restricted

Study of the angular monentum dissipationin the system 32S+64Ni in deep inelastic collisions

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Description

In the present thesis energy and angular correlations of neutrons with deep-inelastically scattered projectile-like fragments (PLF) were studied. A detailed kinematic analysis resulted that the detected neutrons can nearly completely be assigned to the evaporation of the heavy recoil nuclei. The temperatures of the target-like fragments (TLF) and the neutron multiplicities indicate a mass-proportional partition of the excitation energy to PLF and TLF. A study of the spectra and correlations in the framework of the statistical model allows an estimation of the mean spin and the widths of the spin distributions for the TLF. The results are compatible with the assumption of a rigid rotation of the dinuclear system (sticking) at entrance angular momenta around 1crit. The widths of the spin distribution favour a nearly complete alignment of the dissipated angular momentum. (orig.)

Abstract (German)

In der vorliegenden Arbeit wurden Energie- und Winkelkorrelation von Neutronen mit tiefinelastisch gestreuten projektilartigen Fragmenten (PLF) untersucht. Eine detaillierte kinematische Analyse ergab, dass die nachgewiesenen Neutronen nahezu vollstaendig der Verdampfung der schweren Rueckstosskerne zugesprochen werden koennen. Die Temperaturen der targetartigen Fragmente (TLF) und die Neutronenmultiplizitaeten weisen auf eine massenproportionale Aufteilung der Anregungsenergie auf PLF und TLF hin. Eine Untersuchung der Spektren und Korrelationen im Rahmen des statistischen Modells erlaubt eine Abschaetzung der mittleren Spins und der Breiten der Spinverteilungen fuer die TLF. Die Ergebnisse sind vereinbar mit der Vorstellung einer starren Rotation des di-nuklearen Systems (sticking) bei Eingangsdrehimpulsen um 1crit. Die Breiten der Spinverteilung sprechen fuer eine nahezu vollstaendige Ausrichtung des dissipierten Drehimpulses. (orig.)

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Additional details

Additional titles

Original title (German)
Untersuchung der Drehimpulsdissipation im System 245 MeV

Publishing Information

Imprint Pagination
53 p.
Report number
INIS-mf--10793

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
19016301
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Numerical Data, Thesis
Descriptors DEI
ALUMINIUM ISOTOPES; ANGULAR CORRELATION; ANGULAR DISTRIBUTION; CARBON ISOTOPES; CHARGE DISTRIBUTION; DEEP INELASTIC HEAVY ION REACT; DIFFERENTIAL CROSS SECTIONS; DISSIPATION FACTOR; ENERGY SPECTRA; EVAPORATION MODEL; EXPERIMENTAL DATA; FLUORINE ISOTOPES; INCLUSIVE INTERACTIONS; INTERMEDIATE MASS NUCLEI; KINETIC ENERGY; LIGHT NUCLEI; MAGNESIUM ISOTOPES; MEV RANGE 100-1000; MULTIPLICITY; NEON ISOTOPES; NEUTRONS; NICKEL 64 TARGET; NITROGEN ISOTOPES; NUCLEAR ALIGNMENT; NUCLEAR FRAGMENTS; NUCLEAR TEMPERATURE; OXYGEN ISOTOPES; PHOSPHORUS ISOTOPES; SILICON ISOTOPES; SODIUM ISOTOPES; SPIN; SULFUR ISOTOPES; SULFUR 32 REACTIONS
Descriptors DEC
ANGULAR MOMENTUM; BARYONS; CORRELATIONS; CROSS SECTIONS; DATA; DISTRIBUTION; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; FERMIONS; HADRONS; HEAVY ION REACTIONS; INFORMATION; INTERACTIONS; MATHEMATICAL MODELS; MEV RANGE; NUCLEAR MODELS; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; SPECTRA; TARGETS