Degradation of KNN-Based Lead-Free Piezoelectric Material Under Gamma Irradiation Dai, Gang ; Du, Yijia ; Zhou, Quanfeng ; Zhong, Le ; Sun, Xiangyu ; Wang, Ke ; Zhang, Jian Abstract Publication: IEEE Transactions on Nuclear Science Pub Date: August 2018 DOI: 10.1109/TNS.2018.2817494 Bibcode: 2018ITNS...65.1964D