University of Saskatchewan  Physics and Engineering Physics

Experimental Subatomic Physics 

Photodisintegration of Few-Body Nuclei

Recently it has become possible, for the first time, to perform accurate and complete calculations of the photo-disintegration of few-body nuclei using the Lorentz integral transform method. These calculations have shown that there are significant differences in the calculated total photon absorption cross sections in few-body nuclei depending on the form of the NN potential used and the form of the three-nucleon (NNN) potential. 10-20% differences are found in the peak of the Giant Dipole Resonance and in the tail of the GDR (up to about 120 MeV) there are up to 50% differences. The time is now ripe for high precision (<2% error) measurements of the photo-nuclear cross sections for 3He, 3H and 4He. The HIGS facility with its mono-energetic high photon flux is ideally suited for this task. Such high precision measurement will be able to differentiate between potentials, and thus be sensitive to the underlying nuclear dynamics, as well as shed new light on our understanding of three-nucleon potentials. Individual reaction channels will be measured along with the total photon absorption cross section since it has been noted that these calculation will be extended to allow the calculation of exclusive cross sections as well.

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Last updated: 16 February 2001