title: Spin and energy analyzed photoemission: a feasibility analysis.
abstract: New scientific opportunities, particularly for investigation of surface magnetism, will be provided by spin and energy analyzed photoemission. Electron-optical conservation laws and phase space concepts are summarized and applied to determine the feasiblity of an experiment consisting of a photoemitter in a magnetic field, a photoelectron energy analyzer and an electron spin analyzer. For the example of photoemission from a Ni crystal using He I resonance radiation and typical parameters for the energy and spin analyzers, a final signal count rate of approximately 220 counts/s is calculated. Ways to increase the count rate by orders of magnitude are described. In particular, a new experimental configuration is suggested which may avoid the large reduction in count rate caused by the magnetic field.
authors.affiliation: National Bureau of Standards, Washington, D.C. 20234, USA.
authors.forename: D T
authors.initials: DT
authors.lastname: Pierce
authors.forename: C E
authors.initials: CE
authors.lastname: Kuyatt
authors.forename: R J
authors.initials: RJ
authors.lastname: Celotta