Paramagnetic defects in neutron-irradiated α-quartz: Novel Al-associated E’ centers R. I. Mashkovtsev, S. M. Botis, M. J. Nilges and Y. Pan EPL, 128 5 (2019) 54004 Published online: 30 January 2020 DOI: 10.1209/0295-5075/128/54004