Preequilibrium ( p , n ) reaction as a probe for the effective nucleon-nucleon interaction in multistep direct processes

Journal Article · Tue May 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.2010· OSTI ID:6805462

Scobel, W; Trabandt, M ^[1]; Blann, M; Pohl, B A; Remington, B A ^[2]; Byrd, R C ^[3]; Foster, C C ^[4]; Bonetti, R; Chiesa, C ^[5]; Grimes, S M ^[6]

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1. I. Instituut fuer Experimentalphysik, Universitaet Hamburg, D-2000 Hamburg 50, (Federal Republic of Germany)
2. Lawrence Livermore National Laboratory, Livermore, California 94550 (USA)
3. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
4. Indiana University Cyclotron Facility, Indiana University, Bloomington, Indiana 47405 (USA)
5. Istituto de Fisica Generale Applicata, dell'Universita di Milano, (Italy)
6. Ohio University, Athens, Ohio 45701 (USA)

The spectral continua {ital E}{sub {ital n}}{ge}30 MeV of neutrons from the reactions {sup 27}Al, {sup 90}Zr, {sup 208}Pb({ital p},{ital xn}) have been measured for {ital E}{sub {ital p}}=120 and 160 MeV and angles 0{degree}{le}{theta}{le}145{degree}. Angular distributions can be explained quantitatively in absolute values and shapes over five orders of magnitude as statistical multistep direct emission in which up to six steps are involved with significant contributions. The strength {ital V}{sub 0} of the effective nucleon-nucleon interaction applied shows a systematic dependence on the projectile energy {ital E}{sub {ital p}}{le}160 MeV that is consistent with that of spectroscopic factors for single step distorted-wave Born approximation results for transitions to low-lying states. The data also agree well with predictions of a recent phenomenological parametrization.

• OSTI ID: 6805462
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:5; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALUMINIUM 27 TARGET
ANGULAR DISTRIBUTION
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BARYONS
BORN APPROXIMATION
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DIRECT REACTIONS
DISTRIBUTION
DWBA
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
ISOCHRONOUS CYCLOTRONS
IU CYCLOTRON
LEAD 208 TARGET
MEV RANGE
MEV RANGE 100-1000
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PRECOMPOUND-NUCLEUS EMISSION
PROTON REACTIONS
SPECTROSCOPIC FACTORS
TARGETS
TIME-OF-FLIGHT METHOD
ZIRCONIUM 90 TARGET