Photoion yield spectra of singly and doubly charged lanthanides in the region of the 5p excitation: The elements La, Ce, Pr, Nd, Sm, and Eu

Journal Article · Wed Feb 15 04:00:00 EST 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.1780· OSTI ID:6532794

Dzionk, C; Fiedler, W; Lucke, M v; Zimmermann, P

Using synchrotron radiation, an atomic beam technique, and a time-of-flight spectrometer the photoion yield spectra of the singly and doubly charged lanthanides La, Ce, Pr, Nd, Sm, and Eu in the region of the 5p excitation between 20 and 40 eV were measured. The experimental results are discussed within the concept of autoionizing atomic states and the production of doubly charged photoions by stepwise processes. For Pr, as an example, the partial cross sections of the subshells 6s/sub 1/2/, 4f/sub 5/2/, 5p/sub 3/2/, and 5p/sub 1/2/ were calculated with the method of the time-dependent local-density approximation, and the results are compared with the Pr/sup +/ and Pr/sup 2+/ signals.

• Research Organization: Institut fuer Strahlungs- und Kernphysik, Technische Universitaet Berlin, Hardenbergstrasse 36, D-1000 Berlin 12, Federal Republic of Germany
• OSTI ID: 6532794
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 39:4; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC BEAMS
ATOMS
AUTOIONIZATION
BEAMS
BREMSSTRAHLUNG
CHARGE STATES
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
IONIZATION
METALS
PHOTOIONIZATION
RADIATIONS
RARE EARTHS
SYNCHROTRON RADIATION
TIME-OF-FLIGHT METHOD