Determination For Brody-type Nearest Neighbor Spacing Distribution of Energy Spectra

In the statistical analysis of energy level fluctuations, NNS distribution is one of the important characteristic measures. Its analysis together with determination and calculation usually is a puzzling procedure of approximate treatment. Based on the concept of energy level repulsion and the corresponding Brody model of energy spectra, an effective algorithm for identifing the Brody-type distribution and determining its characteristic parameter is suggested in this article. A series of calculational examples proves the advantage of this algorithm which is conducive to the standardization of the treatmental process of the spectra analysis.