A Search Technique for γ-ray Bands Using Segmented Fourier Analysis.
Abstract
A band-locator technique employing Fourier spectrum analysis has been developed for γ-ray spectra. This is a purely mathematical routine based on superdeformed, hyperdeformed, and normal rotational band frequency descriptions. This search routine has been designed to be part of a modified DAMM program from the ORNL users-software. The Fast Fourier Transform is part of the package from IMSL, Inc. Within frequency space there are unique characteristics inherent in each type of band which, when retransformed into energy space, can reconstitute the original peaks. Initially, a ``standard'' band is generated from a spin and rotational constant. The peak shape is then designed, matching the statistical information from the actual data peaks for FWHM variation, relative peak height, and calibration. Conversion into frequency space provides a pattern, segments of which can act as a template to be extracted from the frequency spectrum of the original data set. When confronted with a complete unknown, the presence of these segmented band frequencies provides useful information in locating the band. Examples will be presented for normal and superdeformed rotational bands.
- Publication:
-
APS Meeting Abstracts
- Pub Date:
- May 1996
- Bibcode:
- 1996APS..MAY..A807H