diàn zǐ fú
electron volt (unit of energy used in particle physics, approximately 10^-19 Joules)
zhào diàn zǐ fú
mega electron volt MeV (unit of energy equal to 1.6 x 10-13 Joules)
jí diàn zǐ fú
giga electron volt GeV (unit of energy equal to 1.6 x 10-10 Joules)