Accession Number : AD0702096

Title :   REDUCTION OF INTERNAL CONVERSION ELECTRON DATA.

Descriptive Note : Final rept. Feb 67-Jul 69,

Corporate Author : AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Hennecke,H. J.

Report Date : DEC 1969

Pagination or Media Count : 40

Abstract : A description is given of several methods of analyzing internal conversion electron spectra measured with a magnetic spectrometer. All the methods discussed used linear least-squares techniques or a suitable linearization for non-linear cases. The primary purpose of all these analysis techniques is to provide systematic methods for the most reliable determination of the intensity of conversion lines from available data and also a reliable estimate of the error limits for this intensity. Consideration is given to the problems associated with time correction of the 'single-channel-analyzer-type' data obtained with magnetic spectrometers and to the combination of multiple scans over a given spectral region for such data. In particular, such corrections become quite complex in the study of internal conversion lines superimposed upon beta continua from a source containing several beta-decaying nuclides with different half-lives. In addition, spectrum stripping techniques utilizing empirical line shapes for a maximum of 5 overlapping lines are presented. The effects of correlations between the overlapping lines, the effects of the position (momentum) uncertainty of the lines, and the effects of empirical line shapes are discussed. Analysis techniques equivalent to those presented are invaluable for the routine analysis of conversion spectra, for the accurate determination of multipolarity mixing ratios and for the accurate measurement of L and M subshell ratios. (Author)

Descriptors :   (*NUCLEAR STRUCTURE, DETERMINATION), (*INTERNAL CONVERSION, NUCLEAR RADIATION SPECTROSCOPY), LINE SPECTRA, SPECTROMETERS, LEAST SQUARES METHOD, STATISTICAL DISTRIBUTIONS

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE