Investigation of Compound Nucleus Reactions on the Target Nuclei 88Sr and 89Y with Polarized Protons View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1976

AUTHORS

W. Kretschmer , G. Graw

ABSTRACT

In scattering experiments, where the energy resolution is much greater than widths and spacings of the finestructure resonances, the energy averaged cross section is a sum of the direct (DI) and compound nucleus (CN) cross section. The polarization dependent part of the cross section 〈σA〉, which is independent of the CN-scattering, can be used to determine the direct part of the cross section and from that σCN = 6exp − σDI 1). We have investigated the proton induced CN-reactions on the target nuclei 88Sr and 89Y near the lowest isobaric analog resonances (IAR). In this energy region around 5 MeV direct inelastic reactions are strongly reduced due to the Coulomb barrier and the (p,n)-reactions proceed to 3 levels in the residual nuclei 88Y and 89Zr, respectively. Most partial waves have weak or medium absorption, the absorption is strong for the resonant d5/2 partial wave at resonance energy and for the neutron p-waves. The simultaneous description of compound-elastic and (p,n)-cross sections allows a critical test of the various Hauser-Feshbach formulas2, 3) for a situation, where only few channels are open and furthermore weak and strong absorption is present. Recently a similar test of CN-formulas has been made by Genz et al.4) in a many channel case (Ep ≈ 6.1MeV near the S1/2 IAR observed in the (p,po) and (p,n) reactions on88Sr), where the compoundelastic cross section has been extracted from a fluctuation analysis. More... »

PAGES

765-766

Book

TITLE

Proceedings of the Fourth International Symposium on Polarization Phenomena in Nuclear Reactions

ISBN

978-3-0348-5507-5
978-3-0348-5506-8

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-0348-5506-8_193

DOI

http://dx.doi.org/10.1007/978-3-0348-5506-8_193

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1038646872


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