Physics – Nuclear Physics
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvc..44.2195k&link_type=abstract
Physical Review C (Nuclear Physics), Volume 44, Issue 5, November 1991, pp.2195-2208
Physics
Nuclear Physics
62
Low And Intermediate Energy Heavy-Ion Reactions, Radiative Transfer, Scattering
Scientific paper
Coulomb dissociation of light nuclear projectiles in the electric field of heavy target nuclei has been experimentally investigated as an alternative access to radiative capture cross sections at low relative energies of the fragments, which are of astrophysical interest. As a pilot experiment the breakup of 156 MeV 6Li projectiles at 208Pb with small emission angles of the α particle and deuteron fragments has been studied. Both fragments were coincidentally detected in the focal plane of a magnetic spectrograph at several reaction angles well below the grazing angle and with relative angles between the fragments of 0°-2°. The experimental cross sections have been analyzed on the basis of the Coulomb breakup theory. The results for the resonant breakup give evidence for the strong dominance of the Coulomb dissociation mechanism and the absence of nuclear distortions, while the cross section for the nonresonant breakup follows theoretical predictions of the astrophysical S factor and extrapolations of corresponding radiative capture reaction cross section to very low c.m. energies of the α particle and deuteron. Various implications of the approach are discussed.
Baur Gerhard
Gils H. J.
Gsottschneider G.
Heide N.
Jelitto H.
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