/sup 55/Mn(n,. cap alpha. )/sup 53/Cr and /sup 59/Co(n,. cap alpha. ) reactions at E-italic/sub n/ = 14. 1 MeV

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

DOI:https://doi.org/10.1103/PhysRevC.34.460· OSTI ID:5380079

Fischer, R; Traxler, G; Uhl, M; Vonach, H; Maier-Komor, P

The energy and angular distributions of the ..cap alpha.. particles from the /sup 55/Mn(n,x-italic..cap alpha..) and /sup 59/Co(n,x-italic..cap alpha..) reactions for 14.1 MeV incident neutrons were measured by means of a multitelescope system. The results concerning total helium production are in good agreement with existing helium accumulation measurements, whereas the angular distributions reported in the literature for the /sup 59/Co(n,..cap alpha..) reaction could not be confirmed. The results are analyzed in the framework of the statistical model of nuclear reactions. Comparison of such calculations with the measured ..cap alpha..-emission cross sections allows the extraction of nuclear level densities for /sup 52/V and /sup 56/Mn, the residual nuclei reached in the reactions studied, in the energy region up to the neutron binding energy, and for /sup 55/Mn and /sup 59/Co, the residual nuclei reached by neutron emission, for energies around 11 MeV. The level densities derived in this way agree very well with the prediction of the back-shifted Fermi-gas model for the level density parameters of Strohmaier and Uhl. For /sup 52/V and /sup 56/Mn there is also excellent agreement with the level densities derived from average s-italic-wave neutron resonances. The spin cutoff factors derived from the ..cap alpha..-particle angular distributions indicate that there is no reduction of the effective moment of inertia below the rigid body value.

• Research Organization: Institut fuer Radiumforschung und Kernphysik der O-dieresissterreichischen Akademie der Wissenschaften, 1090 Wien, Austria
• OSTI ID: 5380079
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 34:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BINDING ENERGY
CHARGED PARTICLES
COBALT 59 TARGET
CROSS SECTIONS
DATA
DIRECT REACTIONS
DISTRIBUTION
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
FERMI GAS MODEL
HADRON REACTIONS
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MANGANESE 55 TARGET
MANGANESE 56
MANGANESE ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MINUTES LIVING RADIOISOTOPES
MOMENT OF INERTIA
MULTI-NUCLEON TRANSFER REACTIONS
NEUTRON REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-ODD NUCLEI
PARTIAL WAVES
PARTICLE PROPERTIES
RADIOISOTOPES
S WAVES
SPIN
STATISTICAL MODELS
TARGETS
THREE-NUCLEON TRANSFER REACTIONS
TRANSFER REACTIONS
VANADIUM 52
VANADIUM ISOTOPES