Since that time, SAMMY has undergone significant modifications: (1) User-friendly options have been incorporated to streamline common operations and to protect a run from common user errors (2) the Reich-Moore formalism has been extended to include an optional logarithmic parameterization of the external R-matrix, for which any or all parameters may be varied (3) the ability to vary samples thickness, effective temperature, matching radius, and/or resolution-broadening parameters has been incorporated (4) to avoid loss of information more » (i.e., computer round-off errors) between runs, the covariance file now includes precise values for all variables and (5) unused but correlated variables may be included in the analysis. In 1980 the multilevel multichannel R-matrix code SAMMY was released for use in analysis of neutron data at the Oak Ridge Electron Linear Accelerator. Among these changes are: (1) an alternative matrix-manipulation method for use in certain special cases (2) division of theoretical cross-section generation and broadening operations into separate segments of the code (3) an option to use the multilevel Breit-Wigner approximation to generate theoretical cross sections (4) new input options (5) renaming all temporary files as SAM.DAT (6) more sophisticated use of temporary files to maximize the number of data points that may be analyzed in a single run and (7) significant internal restructing of the code in preparation for changes described here and for planned future changes. Recently, major changes within SAMMY have led to the creation of version O, which is documented in this report. In August of 1984 the users' guide for version P of the multilevel multichannel R-matrix code SAMMY was published. This report is intended to be complete documentation for the current version of SAMMY. Because of these and earlier changes, the 1980 SAMMY manual is now obsolete. (5) Unused but correlated variables may be included in the analysis. (4) To avoid loss of information more » (i.e., computer round-off errors) between runs, the ''covariance file'' now includes precise values for all variables. (3) The ability to vary sample thickness, effective temperature, matching radius, and/or resolution-broadening parameters has been incorporated. (2) The Reich-Moore formalism has been extended to include an optional logarithmic parameterization of the external R-matrix, for which any or all parameters may be varied. Since that time, SAMMY has undergone significant modifications: (1) User-friendly options have been incorporated to streamline common operations and to protect a run from common user errors. Its publication in looseleaf form will permit updates to the manual to be made concurrently with updates to the code itself, thus eliminating most of the time lag between update and documentation. Because of these and earlier changes, the 1980 SAMMY manual is now hopelessly obsolete. computer round-off errors) between runs, the ``covariance file`` now includes precise values for al variables, (5) Unused but correlated variables may be included in the analysis. Since that time, SAMMY has undergone significant modifications: (1) User-friendly options have been incorporated to streamline common operations and to protect a run from common user errors, (2) The Reich-Moore formalism has been extended to include an optional logarithmic parameterization of the external R-matrix, for which any or all parameters may be varied, (3) the ability to vary sample thickness, effective temperature, matching radius, and/or resolution-broadening parameters has been incorporated, (4) to avoid loss of information more » (i.e.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |