Phenomenology of continuum angular distributions. I. Systematics and parametrization

C. Kalbach and F. M. Mann
Phys. Rev. C 23, 112 – Published 1 January 1981
PDFExport Citation

Abstract

A large number of experimental angular distributions have been studied for particles emitted into the continuum in preequilibrium nuclear reactions in order to study their systematics. For pure multistep direct reactions it has been found that to first order the shapes of these angular distributions are determined by the energy of the outgoing particle. In addition, there is evidence that the division of the cross section into multistep direct and multistep compound components with the latter having a symmetric angular distribution is a meaningful one. The shapes of the angular distributions can be described in terms of Legendre polynomials. The polynomial coefficients are given by simple phenomenological relations involving the energy of the outgoing particle. The same reduced coefficients are used for multistep direct and multistep compound processes except that only even order polynomials are considered in the latter case. The present formulation has been shown to have significant predictive ability for light ion reactions.

NUCLEAR REACTIONS A(a,b), A=C12 to Th232, a=p,d,He3,He4, b=n,p,d,t,He3,He4, E=1880 MeV, Eb=460 MeV. Deduced systematics of σ(Eb,θ)σ(Eb) in continuum. Parametrized σ(Eb,θ)σ(Eb) in continuum with energy dependent Legendre polynomial coefficients.

  • Received 20 June 1980

DOI:https://doi.org/10.1103/PhysRevC.23.112

©1981 American Physical Society

Authors & Affiliations

C. Kalbach

  • Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina

F. M. Mann

  • Hanford Engineering Development Laboratory, Richland, Washington

See Also

References (Subscription Required)

Click to Expand
Issue

Vol. 23, Iss. 1 — January 1981

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×