Abstract
The suppression of the isospin-½, three-body photodisintegration of is shown to result from two facts: (1) For the , states of three nucleons, the spin-isospin symmetries lead to integral equations dominated by a single effective interaction , which is the average of the -wave spin-singlet and spin-triplet interactions and (2) This supports a bound state due to the nature of the effective-range parameters. In the approximation that the (½,½) states are generated from alone, it is clear that a fraction of the isospin-½ bremsstrahlung-weighted sum rule must come from two-body photodisintegration with a corresponding reduction of the three-body channel contribution, since the total isospin-½ sum rule is fixed. The substantial reduction of the actual physical isospin-½, three-body photodisintegration is directly related to the strength of .
NUCLEAR REACTIONS Photodisintegration of ; exact three-body calculation; isospin sum rules.
- Received 25 September 1978
DOI:https://doi.org/10.1103/PhysRevC.19.310
©1979 American Physical Society