Accession Number:

ADA191925

Title:

Characterization of Yttrium Aluminum Garnet/Yag/Using 14 MeV Neutron Activation,

Descriptive Note:

Corporate Author:

ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB

Personal Author(s):

• Burns, Forrest
• Chen, Michaeline F.
• Caslavsky, Jaroslav L.

Report Date:

1987-12-01

Pagination or Media Count:

21.0

Abstract:

A non-destructive method for the analysis of yttrium, aluminum and oxygen in Yttrium Aluminum Garnet YAG by 14 MeV neutron activation analysis had been developed and evaluated. The fast neutron induces primarily n,2n, n,p or n, alpha reactions with yttrium, aluminum, and oxygen to produce isotopes with measurable characteristic gamma-ray spectra. Concentrations of Y, Al and O were determined on the basis of calibrated nuclear decay emission spectra recorded on selected standards. After each analysis the crystal was returned to the furnace for further adjustments of the growth parameters, and any resultant elemental variations were observed in the next analysis. The accuracy of this method was determined by repeated analyses with various YAG crystals from a series of separate furnace runs. Keywords Neutron, Gamma ray spectroscopy, Oxygen analysis, Characterization, Yttrium aluminum garnet, Fast neutrons.

Descriptors:

• *NONDESTRUCTIVE TESTING
• *OXYGEN
• *YTTRIUM ALUMINUM GARNET
• ACCURACY
• ALUMINUM
• CRYSTALS
• FAST NEUTRONS
• FURNACES
• GAMMA RAY SPECTRA
• GAMMA RAY SPECTROSCOPY
• GROWTH(GENERAL)
• ISOTOPES
• PARAMETERS
• YTTRIUM

Subject Categories:

• Inorganic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE