Threshold double photoionization of atoms with synchrotron radiation

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5613694

Armen, G B

In this dissertation, probabilities of M-shell excitation accompanying K-shell photoionization in argon are examined from both an experimental and theoretical standpoint. In the limit of high excitation energy, the conventional sudden approximation is applied to the problem. Threshold behavior of these probabilities is examined in the central-field dipole approximation, which is seen to reduce to the sudden approximation at larger excitation energies. Auger satellites were measured to determine these double-excitation probabilities as a function of incident photon energy. The theoretically predicted difference between the dependence of shake-up and shake-off probabilities on the photon energy near threshold is demonstrated. The present theory is seen to provide adequate predictions for shake-up probabilities, but to underestimate shake-off.

• Research Organization: Oregon Univ., Eugene (USA)
• OSTI ID: 5613694
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOMS
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GASES
IONIZATION
K SHELL
M SHELL
NONMETALS
PHOTOIONIZATION
PROBABILITY
RADIATIONS
RARE GASES
SYNCHROTRON RADIATION