TY - RPRT TI - Helium metastable density determination in the COST reference source by absolutely calibrated optical emission spectroscopy AU - Myers, Brayden (ORCID:0000000257231446) AU - Fiebrandt, Marcel (ORCID:0000000298773778) AU - Stapelmann, Katharina (ORCID:0000000221162661) PY - 2024 DO - 10.1063/5.0218352 UR - https://www.osti.gov/biblio/2578574 ID - 2578574 ER -