New laser polarization line at the ISOLDE facility

作者：Kowalska M^*; Aschenbrenner P; Baranowski M; Bissell M L; Gins W; Harding R D; Heylen H; Neyens G; Pallada S; Severijns N; Velten Ph; Walczak M; Wienholtz F; Xu Z Y; Yang X F; Zakoucky D

来源：Journal of Physics G: Nuclear and Particle Physics , 2017, 44(8): 084005.

DOI：10.1088/1361-6471/aa77d7

• spin-polarized beam
• optical pumping
• radioactive-ion beam
• betadecay asymmetry

Following a growing interest in spin-polarized beams of radioactive ions, a new laser spin-polarization setup has been installed at the ISOLDE facility at CERN. The setup is located at the VITO beamline which aims to bring together several experimental techniques using polarized ions allowing for studies in nuclear physics, fundamental interactions, material and life sciences. Intensive design work, which took place in 2016, allowed the installation of the first stage of the polarization line. With this experimental setup, the ion beam can be neutralized, polarized and implanted into a solid sample inside an electromagnet which also hosts beta-detectors, where the degree of nuclear spin polarization can be measured. In autumn 2016 the setup was commissioned using short-lived Na-26 and Na-28 beams which were polarized in the D2 line from their atomic ground state. The previously observed degrees of beta asymmetry were reproduced and thus the beamline is now ready for the first physics experiments with spin-polarized radioactive beams.

• 出版日期2017-8