0 degree measurements of momentum distributions of projectile-like fragments

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.46.1383· OSTI ID:7198947

Souliotis, G A; Morrissey, D J ^[1]; Orr, N A; Sherrill, B M; Winger, J A ^[2]

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1. National Superconducting Cyclotron Laboratory and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824 (United States)
2. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

The results of momentum distribution measurements at 0{degree} for projectile-like fragments produced by several intermediate-energy beams and separated using the A1200 beam-analysis device are described. The most detailed measurements were performed for neutron-rich fragments from the reaction of {sup 18}O ({ital E}/{ital A}=80 MeV) projectiles with {sup 27}Al and {sup 181}Ta targets. The analysis of the centroids and widths of the parallel momentum distributions of the fragments indicated that no pure'' fragmentation occurs, but rather, along with fragmentation, direct stripping and/or pickup channels contribute significantly to the production mechanism, especially for fragments close in mass to the projectile. Apart from nucleon-removal products, nuclei with a net number of nucleons picked up from the target were observed with momentum distributions peaked at velocities considerably lower than that of the beam. These distributions are consistent with momentum conservation and the previously established feature of lower energy transfer reactions that the excitation energy is preferentially given to the nucleon acceptor.

• OSTI ID: 7198947
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 46:4; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27 TARGET
OXYGEN 18 REACTIONS
NUCLEAR FRAGMENTATION
TANTALUM 181 TARGET
ENERGY SPECTRA
NEUTRON-RICH ISOTOPES
PARTICLES
CHARGED-PARTICLE REACTIONS
HEAVY ION REACTIONS
ISOTOPES
NUCLEAR REACTIONS
RADIOISOTOPES
SPECTRA
TARGETS
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