SPALLATION REACTIONS OF THORIUM BY 150 AND 82 MEV PROTONS

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Nuclear Phys.

DOI:https://doi.org/10.1016/0029-5582(61)90154-7· OSTI ID:4016431

Lefort, M; Simonoff, G N; Tarrago, X

Spallation reactions of thorium by 150 and 82 Mev protons were studied by radiochemical isolation of Pa, Th, Ac, and Ra isotopes and measurements of absolute cross sections. Calculations were made for comparison, by assuming a model of nuclear reactions by direct interaction and neutron evaporation (Serber- Jackson). Fission-evaporation competition at each step was assumed. The agreement is very satisfactory for (p, pxn) reactions. However, experimental values are nearly twice those calculated for radium and actinium. Several reasons are discussed in order to explain this discrepancy. Direct interaction occurs also for alpha fragments, deuterons, and tritons. Cross sections for alapha particle and triton production were measured at various energies. The formation of tritium is explained in terms of indirect pick-up. (auth)

• Research Organization: Universite, Paris
• NSA Number: NSA-15-025480
• OSTI ID: 4016431
• Journal Information: Nuclear Phys., Journal Name: Nuclear Phys. Vol. Vol: 25
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ACTINIUM
ALPHA PARTICLES
CROSS SECTIONS
DEUTERONS
ENERGY RANGE
EVAPORATION
FISSION
INTERACTIONS
ISOTOPES
MEASURED VALUES
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR THEORY
PHYSICS
PICK-UP
PROTACTINIUM
PROTON BEAMS
PROTONS
QUALITATIVE ANALYSIS
RADIOCHEMISTRY
RADIUM
TARGETS
THORIUM
TRANSDUCERS
TRITONS