TY - RPRT TI - Single-photoelectron collection efficiency in 4D ultrafast electron microscopy AU - Curtis, Wyatt A. AU - Willis, Simon A. AU - Flannigan, David J. PY - 2022 DO - 10.1039/d2cp01250b UR - https://www.osti.gov/biblio/1869639 ID - 1869639 ER -