1. M. G. Spencer and T. Alam, “High power direct energy conversion by nuclear batteries,” Appl. Phys. Rev., 6, No. 031305, 1–20 (2019).
2. J. Neuhoff, “DOE Isotope Program. R&D and Production of Isotopes for Space Applications,” Nuclear and Emerging Technologies for Space Conference (2021).
3. M. Lu, G. Wang, and C. Yao, “Gallium nitride for nuclear batteries,” Adv. Mater. Res., 343–344, 56–61 (2012).
4. G. Feng, M. Chen, S. Bi, et al., “Free and bound states of ions in ionic liquids, conductivity, and underscreening paradox,” Phys. Rev. 9, No. 021024, 1–22 (2019).
5. C. Zhou, J. Zhang, X. Wang, et al., “Review – betavoltaic cell: the past, present, and future,” ECS J. Solid State Sci. Technol., 10, No. 027005, 1–14 (2021).