Elsevier Science Home
Computer Physics Communications Program Library
Full text online from Science Direct
Programs in Physics & Physical Chemistry
CPC Home

[Licence| Download | New Version Template] aabm_v1_0.gz(117 Kbytes)
Manuscript Title: Analysis of polarization experiments.
Authors: J. Nurzynski
Program title: LORNA
Catalogue identifier: AABM_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 36(1985)295
Programming language: Fortran.
Computer: VAX-780.
Operating system: VAX VMS 3.6.
RAM: 106K words
Word size: 32
Keywords: Nuclear physics, Polarization, Nuclear reactions, Particle spectra, Angular distributions, Differential Cross-sections, Analysing powers.
Classification: 17.8.

Nature of problem:
Program LORNA executes global analysis of particle spectra generated in nuclear reactions studied with polarized projectiles. Spectra corresponding to different signs of the source polarization and taken at various reaction angles by an array of independent detectors are analysed automatically and converted to the angular distributions (differential cross-sections and the analysing powers) for groups of particles indicated by the user.

Solution method:
Global analysis of spectra is provided by incorporating nuclear reactions kinematics calculations in the program. Analysis can be carried out either in channel-by-channel integration or by fitting Gaussian distributions.

Up to 20 particle groups belonging to the same nuclear reaction can be specified at one time for the analysis. The program has been written for a specific case of spin 1 projectiles with provision for extending it to other spin specifications. Symmetric Gaussian forms are used.

Running time:
The program contains interactive input and output sections. If executed from terminal, analysis of 200 spectra is completed in about 1.5 mins for one excitation energy.