土曜定例会(99 年 6 月 12 日)報告 1. 実験計画   Kr-一次ビームによる実験(Z. Liu、青井)     measurement for charge distribution (target=Be, degrader=C)         <=> contamination from primary beams         * different predictions from different codes.     R&D for isotope production         72Ni: 0.05 s^-1 8+ isomer ? (c.f. 70Ni) 82Ge 2 80Zn 10^-3     coulex:         84Se: beta_2(estimated)=0.1, E(2+)=1.455 MeV, 1400 s^-1*         78Ge: 0.25 0.62, 400 s^-1           * Doki's estimates           △p = 0.2 %、flat degrader, PI of beam by TOF   少し重い breakup の simulation (X. Liu)     23Al+Pb->p+22Mg (+Pb) with △E(500 micron) E(2mm) at 75 cm +                   hodoscope at 3 m 50 MeV/u , Erel=335 keV (energy of the E2 transition) range of 50 MeV/u 22Mg: 2.1 mm => si total thickness = 2.5 mm energy loss in 500 micron Si: 1 MeV for proton, 180 MeV for 22Mg     energy loss in 2.5 mm Si: 6 MeV for proton     angular spread by multiple scattering         25 mg/cm^2 Pb target => 0.7 deg for proton, 0.4 deg for 22Mg         after 2.5 mm Si => 2.7 deg for proton * need to calculate relative energy resolution