TY - JOUR AU - Penn, David C2 - Journal of Vacuum Science and Technology DA - 1976-01-01 00:01:00 LA - en M1 - 13 PB - Journal of Vacuum Science and Technology PY - 1976 TI - Electron Attenuation Lengths for Free-Electron-Like Metals UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=620105 ER -