The files here contain the G0 GEANT Monte Carlo program and associated
procedures and test case output.  Unfortunately, there is very little
documentation for this program except comments in the code and what can
be gleaned from the CERN manuals for GEANT and the CERN libraries.

Generally files are provided as gnu-zipped files.  In some cases those
files are tar archives.

The following files are available here:

neven-9712.tar.gz	An archive of the December 1997 version of Neven
			Simicevic's code (a snap shot of the code at that
			time).  This version can be used to reproduce
			earlier results.

g0-3c.tar.gz		An archive of version 3C of the code (obsolete).  This
			version was modified by S. Williamson to correct
			problems and introduce new capabilities to
			the program in Jan and Feb 1998.  It exists
			in two editions: a "compare-neven" edition which
			includes some hard-coded cuts on initial
			electron kinematics (for comparison to
			the neven-9712 version above), and a "normal"
			version with no such hard-coded cuts. 

g0-4a1.tar.gz		An archive of version 4A (release 1) of the G0 Geant
			code. This release (dated March 27, 1999) is now
			obsolete.  It is kept here for backup and comparison
			purposes.  (See g0-5a-a00503.tar.gz.)

g0-4a2.tar.gz		An archive of release 2 of version 4A. This release
			(dated April 1, 1999) is now obsolete.  It is kept
			here for backup and comparison purposes.
			(See g0-5a-a00503.tar.gz.)

g0-4a2.tar.gz		An archive of release 2 of version 4A. This release
			(dated April 1, 1999) is now obsolete.  It is kept
			here for backup and comparison purposes.
			(See g0-5a-a00503.tar.gz.)

g0-4a3.tar.gz		An archive of release 3 of version 4A. This release
			(dated April 3, 1999) is now obsolete.  It is kept
			here for backup and comparison purposes.
			(See g0-5a-a00503.tar.gz.)

g0-4a4.tar.gz		An archive of release 4 of version 4A.  This release
			(dated May 19, 1999) is now obsolete.  It is kept
			here for backup and comparison purposes.
			(see g0-5a-a00503.tar.gz)

g0-5a-a00503.tar.gz	Version 5A of G0Geant.  This version contains
			many changes from and improvements to earlier
			versions of the code.  See the "CHANGES" file in
			the archive for details. It is preferable that
			you download the program from the JLab CUE system
			(see the directory: /group/e91017/g0cvs/g0-5a).
			The version here was copied from
			/group/e91017/g0cvs/targz_distribution on May 3, 2000

g0-5a-jeff-a00503.tar.gz A development version of G0Geant from Jeff Martin
			This is a snap-shot from Jeff Martin's web site
			on 5/3/00.

geant321.car.gz		The GEANT version 3.21 core routines necessary
			for compilation of the G0 Monte Carlo.

flukaaf.dat.gz		Data for the FLUKA package.  This data file is
			required by G0 Geant.  It is likely that your
			installation of the Cern software already
			has this file.  This version was copied from the
			96a release of Cernlib.

xsneut95.dat.gz		The MICAP neutron cross sections.  This is another
			data file required by G0 Geant.  Probably your
			installation of the Cern software already
			includes this file.  This version was copied from the
			95a release of Cernlib.  

fcalc-3b.tar.gz		This archive contains version 3b of the "Fcalc"
			library -- originally written by Joe Mandeville and 
			then extensively modified by Steve Williamson.  This
			library is required by the most recent version (4a) of
			G0 Geant.

g0-4a3-acad.tar.gz	This archive contains Autocad (Release 12) 3D models
			produced using euc2acad on the geometry files supplied
			with G0 Geant 4a (Release 3).  The models were created
			for forward-proton mode only (though it wouldn't
			be hard to do the backward mode). Both a standard
			(cold) dimension model and a warm dimension model
			(C_LEA=C_ALU=1) are available.  The latter is for the
			purpose of comparison to fabrication drawings.  Models
			are supplied in both DWG and DXF format.  See further
			comments in the README file.

euc2acad-4a.tar.gz	Gnu-zipped tar archive containing a program which
			converts euclid format geometry description (produced
			by Geant) to an Autocad "script". See the README file.

fcalc-linux.tar.gz	A version of the "Fcalc" library for Linux developed
			by Adam Scott (ascott@its.caltech.edu) to be used with
			g0-linux (above).

g0-2d.euclid.gz		A (now obsolete) version of the geometry file with
			changes as of January 31, 2000.  Note that the version
			number does not correspond to to the version of
			G0Geant. Those version numbers have been "decoupled".

g0-2e.euclid.gz		A (now obsolete) version of the geometry file with
			changes as of February 7, 2000.  This version includes
			a corrected version of the FPD detectors.

g0-2f.euclid.gz		An (now obsolete) version of the geometry file with changes
			as of May 3, 2000.  This version includes a realistic
			definition of the CEDs as created by Alice Allen.

g0-2g.euclid.gz		An updated version of the geometry file with changes
			as of May 11, 2000.  This version includes changes
			made by Jeff Martin.  Jeff added deuterium selection
			based on the TARG data card (here renamed TARG_FLAG
			to not conflict with TARG volume).  Jeff added more
			documentation.  TARB_FLAG tells if bremsstrahlung
			generator turned on (TARB data card). Cerenkov medium
			parameters section is added (taken from SAMPLE), though
			not in use, yet.

g0-2g-acad.tar.gz	An archive of drawings (forward/backward and
			cold/warm) of the geometry defined by g0-2g.euclid
			produced with euc2acad and Autocad Rel 12.

det2euc-1d.tar.gz	An archive containing a program which converts the
			"standard" detparam.log file (which defines the
			detector shapes and positions) to euclid+ format.

gcalor/			A package simulating hadronic interactions down to 1 MeV
			for nucleons and charged pions and into the thermal region
			for neutrons.