Two-electron--one-photon transition in aluminum following double-K-shell ionization

Journal Article · Fri Jul 15 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.688· OSTI ID:7194062

Auerhammer, J; Genz, H; Kumar, A; Richter, A

The decay possibilities of atoms with two K-shell vacancies have been studied by bombarding a thin (465 ..mu..g/cm/sup 2/) Al target with electrons of E/sub 0/ = 20 keV. In addition to the more common probability involving a sequential decay (which leads to a K/sup -2/..-->..K/sup -1/L/sup -1/ transition with the emission of a K..cap alpha.. hypersatellite x ray, called the one-electron--one-photon transition (OEOP)), we have also investigated the weakly correlated two-electron--one-photon transition (TEOP) by spectroscopy of the emitted x rays using a high-resolution crystal spectrometer. The two transitions were recorded with different crystals always relative to the intensity of the K..cap alpha.. line, which originates from a single-K-shell vacancy. The branching ratio R/sub B/ = I/sub TEOP//I/sub OEOP/ was found to be R/sub B/ = (2.2 +- 0.8) x 10/sup -3/, which is in good agreement with theoretical predictions, that include the electron correlation approximately and is close to previous heavy-ion induced investigations.

• Research Organization: Institut fuer Kernphysik, Technische Hochschule Darmstadt, D-6100 Darmstadt, West Germany
• OSTI ID: 7194062
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM
ATOM COLLISIONS
COLLISIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
K SHELL
KEV RANGE
KEV RANGE 10-100
L SHELL
METALS
SPECTRA
SPECTROSCOPY
X-RAY SPECTRA