Anomalous backward alpha scattering

  • The elastic alpha scattering to backward angles has been studied for 40,42,44,48Ca between 40.7 and 72.3 MeV. The cross sections for 40Ca are larger than those for the higher isotopes up to the highest energies. They show backward increases that disappear above 50 MeV. The enhancement factor for 40Ca over 42,44Ca varies smoothly with energy. 48Ca does also show a backward cross-section enhancement over 42,44Ca. alpha -cluster rotational bands in the 44Ti compound state, four-nucleon correlations in 40Ca, and the l-dependent optical model are discussed as approaches to understand the anomaly. The rotator model appears to agree qualitatively with the experimental data. It involves rotational bands extending at least up to J=16 in 44Ti.

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Author:Reinhard StockGND, G. Gaul, R. Santo, M. Bernas, B. Harvey, D. Hendrie, J. Mahoney, J. Sherman, J. Steyaert, M. Zisman
Parent Title (German):Physical review C
Document Type:Article
Date of Publication (online):2005/09/21
Year of first Publication:1972
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/09/21
Page Number:9
First Page:1226
Last Page:1234
Source:Phys. Rev. C 6, 1226-1234 (1972), ©1972 The American Physical Society,
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht