TY - JOUR AU - Ramsey, M AU - Netzer, F AU - Clark, Charles AU - Matthew, J C2 - Zeitschrift Fur Physik B-Condensed Matter DA - 1991-01-01 00:01:00 LA - en M1 - 85 PB - Zeitschrift Fur Physik B-Condensed Matter PY - 1991 TI - Environmentally "controlled collapse" of the 4f orbital in Cs, ER -