3S, 3Po,e, 3De,o resonance series in helium

Resonance parameters for more than 1700 doubly excited states in S-3, P-3(o,e) and D-3(e,o) manifolds up to N = 5 threshold are obtained by means of the B- splineK- matrix method with maximum orbital angular momentum l (max) = 8. Excellent agreement is found with the best available data in the literature. A detailed analysis of the resonances based on the propensity rules for all relevant channels arranged in schematic patterns allows one to classify the series according to the usual approximate models. The analysis, made possible by the extended energy range considered, helps to asses the limits of these models for the triplet series and discloses the occurrence of nine intruder states and many ` collisions' between resonance series.