Projectile-like fragments from /sup 20/Ne + /sup 197/Au and the correlated energy transfer studied by counting the simultaneously emitted neutrons

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.36.90· OSTI ID:5977236

Buergel, M; Fuchs, H; Homeyer, H; Ingold, G; Jahnke, U; Thoma, G

For the reaction /sup 20/Ne+ /sup 197/Au at the bombarding energy of 290 MeV the number of neutrons emitted in coincidence with quasielastic projectile-like fragments is counted eventwise with high efficiency and is used to discriminate between the two most frequent processes leading to a given ejectile, (i) the transfer of n nucleons from the projectile to the target, and (ii) the transfer of (n-4) nucleons together with the (subsequent) emission of an ..cap alpha.. particle. The two processes differ in the excitation energy given to the target-like residue and hence in the number of neutrons evaporated, and this difference appears also in the neutron-number ejectile-energy correlations. In the average, for each (9.3 +- 1.0) MeV of excitation energy, one neutron is emitted. For process (i) (all missing projectile nucleons transferred to the target) the ejectiles' mean kinetic energies follow conventional momentum matching conditions up to the transfer of five nucleons. A marked deviation from the same momentum matching conditions is observed for the pure pickup channels and is attributed to an interesting correlation of excitation energy distribution with the direction of nucleon transfer.

• Research Organization: Bereich Kern- und Strahlenphysik, Hahn-Meitner-Institut Berlin GmbH, D-1000 Berlin, Federal Republic of Germany
• OSTI ID: 5977236
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 36:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651920* -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BORON
CARBON
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
CROSS SECTIONS
DATA
DIRECT REACTIONS
DISTRIBUTION
ELEMENTS
EMISSION
ENERGY
ENERGY RANGE
ENERGY SPECTRA
EXPERIMENTAL DATA
FLUORINE
FRAGMENTATION
GOLD 197 TARGET
HALOGENS
HEAVY ION REACTIONS
INCLUSIVE INTERACTIONS
INFORMATION
INTERACTIONS
KINETIC ENERGY
MEV RANGE
MEV RANGE 100-1000
MULTIPLICITY
NEON 20 REACTIONS
NEUTRON EMISSION
NITROGEN
NONMETALS
NUCLEAR REACTIONS
NUMERICAL DATA
OXYGEN
PARTICLE INTERACTIONS
Q-VALUE
SEMIMETALS
SPECTRA
TARGETS
TRANSFER REACTIONS