L-SHELL FLUORESCENCE YIELDS IN HEAVY ELEMENTS

Journal Article · Thu Aug 01 04:00:00 EDT 1963 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.131.1165· OSTI ID:4688343

Jopson, R C; Mark, H; Swift, C D; Williamson, M A

Partial L-shell fluorescence yields of 23 heavy elements have been measured using an x-ray coincidence counting method. Vacancies in the K shell of the target atoms are created by photoelectric absorption of 122- and 136-kev gamma rays emitted by a Co/sup 57/ source. A known fraction of these K-shell vacancies are filled by J electrons. The Lshell vacancies created in this way are then occupied by eiectrons from higher shells, causing emission of L x rays and Auger electrons. The coincidence rate between the Land K x rays determines the fluorescence yield w/sub KL/, which is defined as the partial L-shell fluorescence yield following the emission of K/sub alpha / x rays. w/sub KL/ is a linear combination of the fluorescence yieids of the L/sub II/ and L/sub III/ subshells. A comprehensive comparison with previous measurements is given. (auth)

• Research Organization: Univ. of California, Livermore
• NSA Number: NSA-17-031195
• OSTI ID: 4688343
• Report Number(s): UCRL-6954; 0031-899X
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 131; ISSN PHRVA
• Country of Publication: United States
• Language: English

Related Subjects

ABSORPTION
ATOMIC MODELS
AUGER EFFECT
COBALT 57
COINCIDENCE METHODS
COUNTERS
EFFICIENCY
ELECTRONS
ELEMENTS
EMISSION
ENERGY
EXCITATION
FLUORESCENCE
GAMMA RADIATION
IONIZATION
MEASURED VALUES
ORBITS
PHOTOELECTRIC EFFECT
PHYSICS
RADIATION SOURCES
X RADIATION