spontaneous emission

Yoon, P., & Hwang, J. (2020). Dynamical Coupling of Energetic Electrons and Upper-Hybrid Thermal Fluctuations in the Earth s Radiation Belt. Journal Of Geophysical Research: Space Physics, 125. http://doi.org/10.1029/2019JA027748 (Original work published March 2020)
Hwang, J., & Yoon, P. (2018). High-frequency thermal fluctuations and instabilities in the radiation belt environment. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1029/2018JA025643 (Original work published October 2018)