Isospin breaking effects in the reaction 4He(d,3He)3H at low energies.

We report on a new measurement of the reaction {sup 4}He({ital d},{sup 3}He){sup 3}H to study isospin breaking effects near threshold. We compared the results with microscopic calculations and infer on the importance of specific isosopin-breaking {ital S}-matrix elements. This analysis does not support the idea of an unknown {sup 6}Li resonance causing the observed effects.