This paper reports, for the first time, intense spectator peaks from the reaction D(3He,tp)p, which may result from quasi- elastic scattering (QES) accompanied by charge exchange (CE). Quasielastic scattering was first observed by Kuckes, Wilson and Cooper1, who found that large peaks (called spectator peaks) are observed in the p-p coincidence cross sections from the reaction D(p,2p)n when momentum is transferred only between the two protons, and the neutron (called the spectator particle) remains nearly at rest in the laboratory. QES from the proton in the deuteron has also been studied2-4 in the reactions D(d,dp)n, D(3He,3He p)n, and D(a,ap)n. In CEQES for D(3He,tp)p reaction (see Fig. la), the and neutron would transfer momentum and exchange charge, emerging as triton and proton, and the proton from the deuteron would remain nearly at rest. Alternatively, a direct knockout (KO) process (see Fig. lb) might also produce spectator peaks.
Charge Exchange Spectator Peak Final State Interaction Sequential Decay Quasielastic Scattering
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