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Thls report was preporod o r on account of Gevemmnt sponsored work. Neither the United Stows, nor t k Commission, nor any person aclting on behalf of t k Commission: A. #ekes any worronty or Irspresentstian. expressed or implied, with respect t o the accuracy, complefe=ss, or usdulners of the informotion ca&ained i n this report, or that tho UH of any infarmution, apporotw, method, or process disclosed in this report moy not infringe privately owned rights; or 8. Assums ony kiobilltles with resprcr to the use of, or fot damqea resulting from the u w o i any infermation, apparatus, nuthod, or process dlscloscd i n thls report. As used i n the above, "person pct9ng an brhnlf of tho Commtssion'* fncludos any omployee or contractor of the Commission, o, rmployoe of such conhostor, to the extent that such employee or contmctor 06 the CoMraisslm, or e.mlayoa of s w h eonhector propons, disuminohs, ar provides m.cuess to, any Informotion p w s w n t to his employmnt or conhast Y N~ the Conunisrion, or his employment with such conttactor.

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The energy spectra of tritons, a particles, and deuterons from the reactions z He (d,t)2p, d( z He,t)2p, 3 He( 3 He, 4 He)2^>, and p( z B.e,d)2p were measured at forward angles 0° to 5°, using 36-MeV deuterons and 53-MeV 3 He from the Oak Ridge isochronous cyclotron. The reaction d( z B.e,t)2p at 0° was also studied at 74 MeV. All spectra had peaks in the high-energy region which are attributed to the enhancement of the cross section due to the final-state interaction of the two protons. The final-state interaction theory of Watson and Migdat gives an adequate representation of the data for the reactions 3 He(d,02^> and 3 He( 3 He, 4 He)2^ for the known proton-proton interaction. For the other two reactions, d( z He f t)2p and p( z He,d)2p, the observed peaks are much narrower than the predictions of the Watson-Migdal theory. In the case of d( z U.e f t)2p the narrower peak could be explained by assuming the primary reaction mechanism to be a charge-exchange process. A search for a three-proton enhancement in the reaction 8 He( 3 He,Q3£ was unsuccessful.