Single nucleon removal in relativistic nuclear collisions

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Physical Review (Section) C: Nuclear Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevC.40.1198· OSTI ID:5552540

Benesh, C J; Cook, B C; Vary, J P ^[1]

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1. Physics Department, Iowa State University, Ames, Iowa 50011 (US)

We implement a simple approach to the inclusive cross section for single nucleon removal by relativistic nucleons and nuclei. We first develop the projectile and target dependence of the mean number, {ital N}({ital b}), of nucleon-nucleon collisions as a function of impact parameter in the peripheral region. Using the Glauber approximation, we obtain a simple parametrization for a critical impact parameter {ital b}{sub {ital c}} such that the reaction cross sections for both {ital N}-{ital B} and {ital A}-{ital B} collisions are well represented by {pi}{ital b}{sub {ital c}}{sup 2}. Further study of the {ital b} dependence of {ital N}({ital b}) around {ital b}={ital b}{sub {ital c}} allows us to develop a parametrization of single nucleon abrasion cross sections. Next, we employ the Weizsacker-Williams approximation with {ital b}{sub {ital c}} as the cutoff impact parameter to calculate the Coulomb contribution to the single nucleon removal process. The results are compared with recent data which suggest that the Weizsacker-Williams approximation is inadequate for heavy projectiles. Using our estimates for the nuclear contribution, we find that the data yields good agreement with the Weizsacker-Williams results for virtually all projectile-target combinations. We therefore conclude that the measured deviations from the Weizsacker-Williams results do not represent new physics, but rather reflect uncertainties in the estimation of the nuclear contribution to the single nucleon removal process. As an elementary example of the possible new physics that may be observed in this process, we calculate the contributions from a coherent nuclear process and the possible interference effects. For heavy projectiles, we find that the interference effects are comparable to the present experimental uncertainties.

• OSTI ID: 5552540
• Journal Information: Physical Review (Section) C: Nuclear Physics; (USA), Vol. 40:3; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEON REACTIONS
KNOCK-OUT REACTIONS
COULOMB FIELD
CROSS SECTIONS
GLAUBER THEORY
IMPACT PARAMETER
INCLUSIVE INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
RELATIVISTIC RANGE
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
DIRECT REACTIONS
ELECTRIC FIELDS
ENERGY RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
653003* - Nuclear Theory- Nuclear Reactions & Scattering