BREAKUP REACTIONS MEASUREMENTS OF THE PROTON-NEUTRON CORRELATION IN DEUTERON BREAKUP AT 260 MEV G. Berg, J. Blomgren, J. Cameron, F. Jourdan, D. Miller, B. Ni, T. Rinckel, M. Saber, M. Spraker and Y. Wang Indiana University Cyclotron Facility, Bloomington, Indiana 4 74 08 Experiment CElO was designed to study the proton-neutron correlation from deuteron breakup in order to provide important information, such as the possible intensity and energy resolution of a tagged, polarized neutron beam with good resolution created by the breakup of polarized deuterons in the cooler ring. Studies of the interference between Fermi and Gamow-Teller transition amplitudes by the (I?, p) reaction on a light polarized target, and of the isovector term in the nucleon-nucleus interaction by measurement of cross sections and analyzing powers in neutron scattering on nuclei with a neutron excess, would be important sample experiments utilizing such a beam.' The experiment was divided into two parts. The first part, done in the T-region of the Cooler ring in February 1992, was to study the angular correlation of the two breakup nucleons in a small angular range. The second part, done in the G-region in March 1992, measured energies of the two nucleons with a detection system intended to provide about 400 keV resolution. Angular Correlation Measurements In this part of the experiment, the angular correlation of neutrons and protons from the C(d,np), Cu(d,np) and Pb(d,np) reactions were measured in the horizontal angular ranges of 0" < Op 5 6" and 0" 2 8, 2 -6" (on the opposite side of the beam). A stored beam of 260-MeV deuterons with an intensity of about 90 ,uA and a cycle period of 45 s was used with the data-taking time in each cycle being 25 s. Three "skimmer" targets were made from natural C, Cu and Pb, with thicknesses of 650 mg/cm2, 680 mg/cm2, and 2400 mg/cm2 respectively. A proton telescope, consisting of a delay-line wire chamber with both x and y wire planes sandwiched between a pair of 0.3 cm-thick scintillators and followed by two 8.3 cm- thick NaI(T1) detectors, was located downstream from the T-region 6" magnet. The dis- tance between the target and the wire chamber was 124 cm, and the spacing between two adjacent anode wires in each wire plane was 4 mm. The telescope covered breakup