change the variance of the Gaussian magnitude
distribution of the fermi momentum.
Default value: 110 to <MeV/c> per nucleon of
the interacting cluster. In case of 2H and 3He
where Urbana distributions are Default, setting this
option will force Gaussian distributions.
set the least number of detectors, required for a
trigger to <n>.
Default is the total number of triggers
having their trigger-mode bit equal to 1 in their
detector description file.
set the highest number of detectors, allowed for a
trigger to <n>.
Default is the total number of triggers
having their trigger-mode bit equal to 1 in their
detector description file.
Instead of generating simulated events, read
events from standard input in the ENIGMA-output
format. In this way one can compare ENIGMA
histograms with experimental histograms,
without resorting to PAW or other packages.
Some of the normal ENIGMA options will not
work (like the % of beamtime done etc).
Default = off.
Installs a detector named <detname> in the
simulated experiment. A
Detector File
named <detname> should
exist in the current directory, specifying the
detector properties. When <detname>=none
is specified, an already defined detector is
removed and no new one installed.
Default: none.
see -det1. It is advised to not use the same
detectorname twice. I don't know what happens.
So better use a different one here.
...
And so on. The present maximum is:
Select a theoretician to calculate your cross sections:
-
Present choices for pion production are:
- laget
- Blomqvist-Laget [NuclPhysA280(1977)405]
tabulated via the FreeSig code.
- dressler
- E.T.Dressler [CanJPhys66(1988)279]
This option uses cross sections tabulated by F.Blaazer(VuA)
- dressler.eps
- The same formalism, but with inline code, and
no tables. Code due to E.P.Sichterman (RUU)
Default: <theorist>=dressler.eps.
-
For eepn and gampn we offer also several formalisms:
- lorentzian
- An isotropic cross section with a lorentzian
energy dependence, adapted to the missing strength
in the 'dip-region' in the inclusive missing energy
spectra.
- chant
- D(gamma,pn) photodissociation cross section as
parametrized by Chant & Roos in their ThreeDee code.
- rossi
- The 2H(gamma,p)n cross section parametrization
by Rossi et al [PhysRevC 40(1989)2412].
We multiply with the number of Quasi-deuterons
as given by the Levinger constant
[Tavares e.a, JPhysG:NucPartPhys18(1992)521].
Default theorist for eepn and gampn: <theorist>=rossi.
-
For pion absorption, we have only one formalism:
- ashery
- the differential pi+,pp cross section is
parametrized as a Legendre expansion with
energy-dependent coefficients as in
Ashery[Ann.Rev.Nucl.Part.Sci26(1986)207].
3- and 4 nucleon pion absorption processes are assumed to
have the same energy dependence, but are taken
to be isotropic in their (3N or 4N) CM system.
Omit a response function term (T or L or P or I). See Dressler
formalism. e.g. "-omit P -omit I" will
omit the Polarisation and Interference terms
which are not needed for inclusive experiments.
For real photons only the T term is nonzero, and
so Enigma only uses the T term.
Default is to include all four terms for virtual photons, and only the
T term for real photons.
When running enigma.condor, this option should be
included.
Deleting and re-creating the results-subdirectory is
suppressed. This is necessary because Condor tolerates
no shell commands from within the application.
N.B. Be aware that the results/ directory has to pre-exist,
if you are generating histograms.
Default = off.
This parameter determines the amount of correlation between
nucleons in a cluster that interacts with the beam particle.
It may vary between 0 and A, where A is the number of nucleons
in the cluster. cp=0 means the cluster has no momentum, the
sum of nucleon momenta is zero (completely anti-correlated)
cp=A means the sum of nucleon momenta is A*(single nucleon)
(completely correlated motion). cp=1 means independent
motion: sum=sqrt(A)*individual momentum distribution width.
Default: cp=1
Give warnings if histogram or table limits are
exceeded. This can occur with read, lookup,
increment or write operations on tables,
histograms, scatterplots etc.
In all cases (on or off) the actual histogram
channel is truncated to the lowest (for overflow)
or the highest (for overflow) valid value.
Default: <on>.
Instead of creating histograms in the directory
with the name ./results, do it in ./<filnam>
Set lower bound of missing energy spectra
equal to <MeV>.
Default: -Tbeam.
Set upper bound of missing energy spectra
equal to <MeV>.
Default: +Tbeam.
Set lower bound of missing energy spectra
equal to <MeV>.
Default: 2*Tbeam/36.
Set lower bound of missing energy spectra
equal to <MeV/c>.
Default: -2*Tbeam.
Set upper bound of missing energy spectra
equal to <MeV/c>.
Default: +2*Tbeam.
Set lower bound of missing energy spectra
equal to <MeV/c>.
Default: 4*Tbeam/36.
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NIKHEF home page.
JV / 6 Jan 1994
