We measure 114 nuclide-production cross sections for an isotopically enriched 208 Pb target bombarded with 1.0 GeV protons. The cross sections are determined using direct ␥ spectrometry with a high-resolution Ge detector. The cross sections are compared to another experiment which used ␥ spectrometry with a natural Pb target; our results average 7.5% less for nuclides measured in common. They are also compared to a kinematically inverse reaction of 1 GeV/nucleon 208 Pb interacting with a hydrogen target; we find our results average 15% higher than those for ͑a different set of͒ common nuclides. We find there is a systematic discrepancy between the cross sections found from the two very different experimental techniques. We also compare our measurements to eight different models. We find most are fairly reliable in predicting cross sections for nuclides not too far away in mass from Pb, but differ greatly in their reliability for nuclides in the deepspallation and fission mass regions. In the spallation region (Aտ155), the CEM2K code, which includes an intranuclear cascade, followed by a preequilibrium stage, leading finally to equilibrium decay, gives the best representation of our data. In the center of the fission/fragmentation mass region, the INUCL code is the most accurate. INUCL includes the same basic ingredients of cascade, preequilibrium, and evaporation, but differs considerably in details. It also contains a comprehensive fission model, which is lacking in CEM2K. No simulation code tested is reliable for the entire mass range of nuclides measured.

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This paper introduces a new approach to measure the muon magnetic moment anomaly a µ = (g − 2)/2, and the muon electric dipole moment (EDM) d µ at the J-PARC muon facility. The goal of our experiment is to measure a µ and d µ using an independent method with a factor of 10 lower muon momentum, and a factor of 20 smaller diameter storage-ring solenoid compared with previous and ongoing muon g − 2 experiments with unprecedented quality of the storage magnetic field. Additional significant differences from the present experimental method include a factor of 1,000 smaller transverse emittance of the muon beam (reaccelerated thermal muon beam), its efficient vertical injection into the solenoid, and tracking each decay positron from muon decay to obtain its momentum vector. The precision goal for a µ is statistical uncertainty of 450 part per billion (ppb), similar to the present experimental uncertainty, and a systematic uncertainty less than 70 ppb. The goal for EDM is a sensitivity of 1.5 × 10 −21 e • cm.

The work is aimed at experimental determining and computer simulating the independent and cumulative yields of residual product nuclei in the target and structure materials of the transmutation facilities driven by high-current accelerators. The ITEP U-10 accelerator was used in 48 experiments to obtain more than 4000 values of the yields of radioactive residual product nuclei in 0.1-2.

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