Strong anomaly in the d-p bremsstrahlung.

An anomaly in the d-p bremsstrahlung cross section, observed previously near the breakup threshold, was unexplained on the basis of an on-shell calculation of the cross section. An improved experiment using a solid target of (CH/sub 2/)/sub n/ has confirmed the energy of this strong anomaly. Off-shell and various neglected on-shell effects are prime candidates for its explanation. Estimates of these effects are calculated. Means of implementing necessary experimental improvements of the art are discussed.