Constrained-phase-space approach to spin alignment in deep-inelastic heavy-ion collisions

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.33.876· OSTI ID:6051539

Trautmann, W

A constrained-phase-space description of equilibrium in the angular momentum degrees of freedom is used to calculate the spin alignment in deep-inelastic heavy-ion reactions. The phase space is constructed by considering the internal degrees of freedom of the excited fragments and the conservation of angular momentum; the constraint which reflects the reaction dynamics is derived from the classical sticking condition. For several cases of mass-asymmetric heavy-ion reactions, the measured alignments are quantitatively reproduced. It is found that the alignment depends most sensitively on the initial angular momentum and on the fragment deformation at separation so that alignment data are useful to determine these quantities. Angular correlations of sequential-fission fragments from deep-inelastic reactions are also calculated. In the considered example, the measured in-plane anisotropy is explained as mainly resulting from the restrictions, imposed by the experimental setup, on the orientations of the orbital angular momenta in the entrance and exit channels.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6051539
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 33:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651515* -- Nuclear Properties & Reactions
A=39-58
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
ANGULAR MOMENTUM
CHARGED-PARTICLE REACTIONS
CORRELATIONS
DEEP INELASTIC SCATTERING
FISSION FRAGMENTS
HEAVY ION REACTIONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MASS SPECTRA
MATHEMATICAL MODELS
MATHEMATICAL SPACE
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PHASE SPACE
SCATTERING
SPACE
SPECTRA
SPIN
STATISTICAL MODELS
TARGETS
TITANIUM 48 TARGET