Magnetic spectrometer Grand Raiden

A high-resolution magnetic spectrometer called "Grand Raiden" is operated a t the RCNP ring cyclotron facility in Osaka for nuclear physics studies at intermediate energies. This magnetic spectrometer has excellent ion-optical properties. In the design of the spectrometer, the second-order dispersion matching condition has been taken into account, and almost all the aberrat ion terms such as (x\theta(3)), (x\theta phi(2)), (x\theta(2)delta) and (x\ theta delta(2)) in a third-order matrix calculation are optimized. A large magnetic rigidity of the spectrometer (K = 1400 MeV) gives a great advantag e to measure the charge-exchange (He-3, t) reactions at 450 MeV. The abilit y of the high-resolution measurement has been demonstrated. Various coincid ence measurements are performed to study the nuclear structures of highly e xcited states through decay properties of nuclear levels following nuclear reactions at intermediate energies. (C) 1999 Elsevier Science B.V. All righ ts reserved.