TY - JOUR AU - M Ramsey AU - F Netzer AU - Charles Clark AU - J Matthew 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 -