Interaction of 5--50 MeV/nucleon /sup 3/He and /sup 4/He with /sup 59/Co

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Phys. Rev. C; (United States)

OSTI ID:5312008

Jastrze-cedillabski, J; Singh, P P; Mro-acute-accentz, T; Vigdor, S E; Fatyga, M; Karwowski, H J

Excitation functions and thick target recoil ranges for radioactive nuclei produced in /sup 3/He and /sup 4/He bombardment of /sup 59/Co over a 5--50 MeV/nucleon energy range have been measured using the activation technique. At 81 and 118 MeV /sup 4/He energy, the angular distributions of the radioactive recoils were also measured. Using the in-beam gamma ray technique, production cross sections for many radioactive as well as stable residual nuclei were measured for the /sup 4/He+ /sup 59/Co system for a /sup 4/He energy range between 30 and 150 MeV. Close to 90% of the reaction cross section was observed over the entire energy range. From the experimental data, information about the energy and linear momentum deposition in the interaction of He projectiles with the Co target was gathered. Two distinct changes in the reaction mechanism are apparent at about 40 and 90 MeV bombarding energies, as manifested by observables related to the energy and momentum deposition. The change of the reaction mechanism at 40 MeV is related to the onset of preequilibrium ..cap alpha..-particle and nucleon emission. The nature of the mechanism change which sets in at 90 MeV is less well understood.

• Research Organization: Heavy Ion Laboratory, Warsaw University, Warsaw, Poland; Indiana University Cyclotron Facility, Bloomington, Indiana 47405
• OSTI ID: 5312008
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 34:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651625* -- Nuclear Properties & Reactions
A=59-89
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
CHARGE DISTRIBUTION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COBALT 59 TARGET
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ENERGY RANGE
EVEN-EVEN NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
GAMMA RADIATION
HELIUM 3 REACTIONS
HELIUM 4
HELIUM ISOTOPES
INFORMATION
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MASS SPECTRA
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
MOMENTUM TRANSFER
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PRECOMPOUND-NUCLEUS EMISSION
RADIATIONS
RADIOACTIVATION
RECOILS
SPECTRA
STABLE ISOTOPES
TARGETS