EFFECTS OF CHARGE EXCHANGE IN DIRECT REACTIONS

The inclusion of charge-exchange effects in direct-reaction theory is discussed and a number of experimental results are then treated: the threshold effect in Zr90(d,p) and Mo92(d,p) excitation curves in the region of the (d,n) threshold to the analog of the parent state, and the behavior of the Zr90(d,np) and Mo92(d,np) total cross sections in the same region; Hamburger's data for Pb207(d,p)Pb208; and, finally, the discrepancy between (d,n) and (He3,d) spectroscopic factors for analog states in several light nuclei. The theory is successful in describing the threshold effect and Hamburger's data, but does not explain the discrepancy in spectroscopic factors. A number of methods of calculating the analog-residual-state wave functions are critically discussed. © 1969 The American Physical Society.