Physics
Scientific paper
Sep 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970phrvc...2..828r&link_type=abstract
Physical Review C, vol. 2, Issue 3, pp. 828-841
Physics
4
Scientific paper
The three-body breakup reactions induced by 47-MeV protons on a gaseous He4 target have been investigated in a kinematically complete experiment. Protons were observed in coincidence with tritons or He3,s at several pairs of coplanar lab angles using two counter telescopes. Data were stored by an on-line computer which serially listed four linear signals from each event on magnetic tape. The proton spectra showed strong enhancements from neutron-proton and proton-proton final-state interactions, in agreement with the predictions of the Watson-Migdal theory. A Chew-Low-type extrapolation procedure was used to extract the np singlet scattering length, which was in fair agreement with the value from np free scattering. The triton and He3 spectra showed peaks due to sequential reaction processes via the continuum resonance states in the He4 system. These enhancements could be identified with previously observed He4 levels of known spin and parity assignments.
Paic Guy
Richardson Reginald J.
Rogers G. J.
Verba J. W.
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