Latest development of MORA at IGISOL

by Luis Miguel Motilla (3rd year PhD student)

Around us we see an universe filled with galaxies, stars and planets like ours. But when we look back to the Big Bang and the processes that created the matter in it, at first we observe that there should have been created the same amount of matter and antimatter, consequently the universe would be empty or different than it is now. Sakharov suggested several conditions to explain the matter-antimatter asymmetry, one of them being the violation of the CP symmetry.

In the MORA experiment, we aim to measure the D triple-correlation of beta decay, which is non zero for violation of T symmetry in polarized nuclei, thus related to CPV. For this we use a symmetrical detector setup made of MCP’s, Phoswiches and Si detectors, to measure coincidences between beta emissions and recoil ions, product of the beta decay of trapped and polarized 23Mg ions, as well as measuring the polarization degree.

Here I will show the MORA setup in JYFL, how we plan to do the measurement, the challenges and successes that we encountered, and the latest experimental results concerning the proof of principle of polarized ions and the D-correlation measurement.