Hibridon© 4.3.7

This is the home page and hypertext help facility for Hibridon© , a program package to solve the close-coupled equations which occur in the quantum treatment of inelastic atomic and molecular collisions. Gas-phase scattering, photodissociation, collisions of atoms and/or molecules with flat surfaces, and bound states of weakly-bound complexes can be treated. Although this hypertext help contains some general formal material, we assume here that you have some background with the quantum theory of inelastic scattering.
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New additions (Version 4.3.7)
Version 4.1, release 5 of the Hibridon© package can be installed on the following platforms:

IBM RS/6000 workstations running under AIX 3.2.5, 4.1.3, 4.1.4, 4.2, 4.3
HP 9000 series workstations running under HPUX 10.01, 10.2, 11.0
DEC Alpha workstations running under OSF 41.64
SGI workstations running under IRIX 5.2 and 6.5
Sun workstations running under SunOS 5.5.1 and 5.7
Hibridon 4.1.5 is no longer actively maintained
You can obtain a copy of Hibridon 4.1.5 as a g'zipped tar archive in binary format (1.4 MB)


Version 4.2 of the Hibridon© package can be installed on the following platforms:

Apple G4 and G5 workstations running under OSX 10.3.2
IBM RS/6000 workstations running under AIX 4.3
You can obtain a copy of Hibridon 4.2 as a g'zipped tar archive in binary format (1.6 MB)



Version 4.3 of the Hibridon© package can be installed on the following platforms:

Apple G5 workstations running under OSX 10.3.9 and 10.4.11 with the IBM xlf 8.1 compiler Hibridon is no longer actively maintained on Apple PowerPC workstations.

Apple Intel workstations running under OSX 10.6 with the Intel ifort compiler
Xeon x86 workstations running under Linux with the Intel (ifort) or Portland Group (pgf95) compilers
SGI ALTIX (ia64 Itanium cpu) workstations under Linux with the Intel (ifort) compiler

You can obtain a copy of Hibridon 4.3 as a g'zipped tar archive in binary format (~2 MB)


This hypertext help facility will guide you in the installation and application of Hibridon©. To ensure the proper display of special characters, your ASCII encoding should be set to ISO 8859-1 (Latin-1) Characters.

If your WEB browser does not support frames, then go to to open a second browser window with an index of all available help links.

Throughout these hypertext links, words in Typewriter Font denote names of input parameters, variables, files, and directories. Names that are enclosed in braces (for example, {name}) can take on different values. Bold face is used for extra emphasis. Also, please take special note of all comments and instructions which follow the “warning” and “take notice” signs


Installation instructions for the Hibridon© package are available here Installation also creates your own copy of these hypertext help files.
Calculations on any particular collision system involve linking several system specific subroutines which define the interaction potential energy surface(s) together with a large number of general routines, which have be compiled previously.
Execution of the Hibridon© package is controlled by the Hibridon driver.
A number of examples have been prepared to help you learn how to use the Hibridon© package. These are particularly instructive once you have had an initial exposure to this help library.
The Hibridon© package was written by M. H. Alexander, D. E. Manolopoulos, H.-J. Werner, B. Follmeg and P. J. Dagdigian, with contributions by P. F. Vohralik, D. Lemoine, G. Corey, R. Gordon, B. Johnson, T. Orlikowski, A. Berning, A. Degli-Esposti, C. Rist, B. Pouilly, G. van der Sanden, M. Yang, F. de Weerd, S. Gregurick, J. Klos and F. Lique. Support for its development was provided by grants (to MHA) from the U. S. National Science Foundation, the U. S. Army Research Office, the Office of Scientific Research of the U. S. Air Force, and (to HJW) from the German Fonds der Chemische Industrie. Copyright (c) 1987, 1991, 1993, 1996, 2000, 2001, 2003, 2004, 2007, 2008, 2009, 2010, 2011 University of Maryland at College Park. All rights reserved.
For further inquiries

This version of Hibridon is dedicated to the memories of Sheldon Green, Peter Andresen, and Pierre Valiron whose untimely deaths robbed us of outstanding scientists, and dear friends, who both made long-lasting and invaluable contributions to the field of inelastic molecular collisions. Ave atque vale.

Current Revision of this help library: 4-August-2011
Applicable version of Hibridon©: 4.3.7