Abstract
Initial experiments were carried out to study spin-isospin transitions in nuclei using (t, 3He) measurements. A triton beam was produced from the breakup reaction ( 4He,t-p) on a 9.25 g/cm 2 Be production target using a 4He beam of 620 MeV. With a beam of 70 enA a yield of 381 MeV tritons with 4.5 × 10 6 particles/s was achieved. The first half of the A1200 beam transport system at NSCL was used to analyze the triton beam. The energy spread at the target position was estimated to be about 23 MeV. The second half of the A1200 was used to analyze the energy of 3He particles from the (t, 3He) reaction. The dispersion matching method was applied to obtain good energy resolution despite the significant energy spread of the incident tritons. The achromatic properties of the A1200 system made it possible to obtain high-resolution (t, 3He) spectra at θ = 0° with a resolution of ΔE E = 0.002 ( ΔE = 780 keV).
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