Spin-polarized radioactive isotope beam produced by tilted-foil technique

The tilted-foil method for producing spin-polarized radioactive isotope beams has been studied using the re-accelerated radioactive Li-8 and In-123 beams produced at Tokai Radioactive Ion Accelerator Complex (TRIAC) facility. We successfully produced polarization in a Li-8 beam of 7.3(5)% using thin polystyrene foils (4.2 mu g/cm(2)). The systematic study of the nuclear polarization as a function of the number of foils and beam energy has been performed, confirming the features of the tilted-foil technique experimentally. After the study, a spin-polarized radioactive In-123 beam, which is the heaviest ever polarized in its ground state by this method, has been successfully generated by the tilted-foil method, for the nuclear spectroscopy around the doubly magic nucleus Sn-132. (V) 2013 Elsevier B.V. All rights reserved.