Final state interactions in the p-p and p-n systems
corresponding to the formation of the singlet states of the di-proton and the deuteron have been observed in the reactions
He³(He³,2p)He⁴ and T(He³,np)He⁴, by measuring the energy spectra
of two of the final state particles detected in coincidence.
These interactions appear as regions of high density of events
along the kinematic contours in two dimensional energy space.
Both p-p and p-He⁴ coincidences from the reaction He³(He³,2p)He⁴
and p-He⁴ coincidences from the reaction T(He³,np)He⁴ were
studied. The dominant mechanism producing the three particle
final states was found to be the sequential breakup through the
states of Li⁵ and He⁵, in agreement with the results of previous experiments. The interaction between the two nucleons affects the distribution of coincidence events only in the region of two dimensional energy space corresponding to a breakup in which the two nucleons emerge with low relative energy. The relative
contributions of the different processes in the reaction
He³(He³,2p)He⁴ was determined for incident He³ energies from
1.15 MeV to 5.0 MeV. It was found that the nucleon-nucleon
interaction becomes less important as the incident energy
increases. The validity of two approximate theories of final
state interactions, the Watson theory and the Phillips, Griffy
and Biedenharn density of states formalism, was checked by
comparing their predictions with the observed energy spectra. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/36933 |
| Date | January 1967 |
| Creators | Blackmore, Ewart William |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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