Evaluations of average level spacings
The average level spacing for highly excited nuclei is a key parameter in cross section formulas based on statistical nuclear models, and also plays an important role in determining many physics quantities. Various methods to evaluate average level spacings are reviewed. Because of the finite experimental resolution, to detect a complete sequence of levels without mixing other parities is extremely difficult, if not totally impossible. Most methods derive the average level spacings by applying a fit, with different degrees of generality, to the truncated Porter-Thomas distribution for reduced neutron widths. A method that tests both distributions of level widths and positions is discussed extensivey with an example of /sup 168/Er data. 19 figures, 2 tables.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6753640
- Report Number(s):
- BNL-28451; CONF-800979-11; TRN: 81-001571
- Resource Relation:
- Conference: Workshop on nuclear data evaluation methods and procedures, Upton, NY, USA, 22 Sep 1980; Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electric dipole transitions from neutron capture in /sup 167/Er resonances
Parity dependence of the level densities of /sup 53/Cr and /sup 55/Cr at high excitation
Related Subjects
ERBIUM 168
ENERGY-LEVEL DENSITY
NUCLEI
LEVEL WIDTHS
PORTER-THOMAS DISTRIBUTION
REVIEWS
STRENGTH FUNCTIONS
DOCUMENT TYPES
ERBIUM ISOTOPES
EVEN-EVEN NUCLEI
FUNCTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
STABLE ISOTOPES
653001* - Nuclear Theory- Nuclear Structure
Moments
Spin
& Models
651813 - Nuclear Properties & Reactions
A=150-189
Theoretical- Energy Levels & Transitions- (-1987)