RE: Advanced sources

Sujoy,

The definition of the beam position / shape through the BEAMPOSit card is
independent of the definition of the starting direction of the particles.
Note that FLOOD produces an isotropic fluence at a sphere which is
different from sampling isotropic particles uniformly within a sphere.

You can define isotropic emission by setting WHAT(3) of the BEAM card >
2000 x PI mrad

Mario

-----Original Message-----
From: owner-fluka-discuss_at_mi.infn.it [mailto:owner-fluka-discuss_at_mi.infn.it=
] On Behalf Of sujoy_at_veccal.ernet.in
Sent: Monday, April 18, 2011 4:40 AM
To: fluka-discuss_at_fluka.org
Subject: Advanced sources

Dear Fluka users,
this new version of fluka has brought some capabilities of extended sources.
I am having some question regarding the same and I have already seen the
advanced workshop tutorials. I want to define an isotropic cylindrical
source of Ir-192.
I have written the following in the input file:
BEAM ISOTOPE
HI-PROPE 77. 192.
BEAMPOS 0.0 0.0 0.24
BEAMPOS 0.0 0.0325 0.06 0.42
CYLI-VOL
Now, I want to know whether I have to activate the FLOOD card in beampos to
 make it isotropic or it is already isotropic ? If it is not isotropic,
how do I make it isotropic ? I am attaching the input card for reference
also.

With Regards,
S. Chatterjee
Scientific Officer,
TLD Unit, BARC
Variable Energy Cyclotron Centre,
1/AF, Bidhannagar,Kolkata-64
Off:+91-33-23184207
Fax:+91-33-23346871
Received on Thu Apr 28 2011 - 23:16:24 CEST