DREB Conference 2024

The SCRIT (Self-Confining RI Ion Target) electron scattering facility [1] was constructed at RIKEN in Japan to enable electron scattering from short-lived unstable nuclei. Electron scattering is a powerful tool for exploring the structure of atomic nuclei because of the well-understood mechanism of electromagnetic interaction. However, its application to short-lived unstable nuclei has been challenging because of the difficulty in preparing thick targets, even though there has been a long-standing desire to investigate exotic features of unstable nuclei using electron scattering [2].
Recently, we achieved a milestone by realizing the world's first electron scattering from online-produced unstable nuclei, ${}^{137}$Cs, at the SCRIT facility after years of development [3,4]. Cesium nuclides were produced through the photo-fission of uranium by irradiating 28 g of uranium with a 15-W electron beam and then ionized using a surface ionization-type ion source in an ISOL system. Finally, a luminosity of 10${}^{26}$ cm${}^{-2}$s${}^{-1}$ was achieved. This experiment serves as a perfect emulation of electron scattering from short-lived unstable nuclei produced online after upgrading the power of the ISOL driver.
In this contribution, we will present recent progress and prospects of the SCRIT electron scattering facility and discuss several topics also that may be only feasible in the future using the SCRIT method.

References:
[1] M. Wakasugi et al., Nucl. Instr. Meth. B317 (2013) 668-673
[2] T. Suda and H. Simon, Prog. Part. Nucl. Phys. 96, 1 (2017)
[3] T. Ohnishi et al., Nucl. Instr. Meth. B541 (2023) 380-384
[4] K. Tsukada et al., Phys. Rev. Lett. 131 (2023) 092502