Eur. Phys. J. A (2009) 42: 453-456
https://doi.org/10.1140/epja/i2008-10770-7

Regular Article - Experimental Physics

Electron scattering based on a novel internal target technique: SCRIT

¹ RIKEN Nishina Center, Saitama, Japan
² Rikkyo University, Rikkyo, Japan
³ Tohoku University, Tohoku, Japan
⁴ Kyoto University, Kyoto, Japan

^* e-mail: wakasugi@riken.jp

Received: 27 November 2008
Revised: 23 February 2009
Accepted: 6 March 2009
Published online: 4 April 2009

Abstract

A novel technique for forming internal targets, named SCRIT (Self-Confining RI Ion Target), has been developed, which can make electron scattering off short-lived radioactive nuclei possible in an electron storage ring. SCRIT confines the ions of interest by utilizing the “ion trapping” phenomenon in the electron storage ring. Approximately 10⁷ stable ¹³³Cs ions were trapped in a three-dimensional configuration along the electron beam axis at an electron beam current of 75mA. The angular distribution of the electrons scattered from the trapped ¹³³Cs ions was successfully measured, and a collision luminosity of 10²⁶/(cm² s) was achieved.