Electron-beam-driven RI separator for SCRIT (ERIS) at RIKEN RI beam factory

Highlights: • We constructed a radioactive isotope separator, ERIS, for the SCRIT electron scattering facility at RIKEN RIBF. • ERIS uses a photofission of uranium to produce a radioactive isotope. • The commissioning of ERIS was perfromed using natural xenon gas. • A 132Sn beam was successfully separated in our first attempt at RI production. -- Abstract: We constructed a radioactive isotope (RI) separator named ERIS (electron-beam-driven RI separator for SCRIT) for the SCRIT (Self-Confinement RI Target) electron scattering facility at RIKEN RI Beam Factory (RIBF). In ERIS, production rate of fission products in the photofission of uranium is estimated to be 2.2 ×1011 fissions/s with 30 g of uranium and a 1-kW electron beam. During the commissioning of ERIS, the mass resolution and overall efficiency, including ionization, extraction, and transmission, were found to be 1660 and 21%, respectively, using natural xenon gas. The preparation of uranium carbide (UC2) RI production targets is described from which a 132Sn beam was successfully separated in our first attempt at RI production