From: John Clem (JMClem@comcast.net)
Date: Wed Feb 26 2003 - 04:02:03 CET
Zhen wu,
I assume you are referring to the standard FLUKA materials:
Fluka Fluka
name number
BLCKHOLE 1
VACUUM 2
Blackhole is defined as a material with a zero absorbing length or an infinite cross-section. All of the geometry regions must be contained within a surrounding blackhole region so that particles escaping the geometry of interest are stopped. The FLUKA vacuum has the expected opposite characteristics. It has a zero density and therefore a zero cross-section for all physical interactions. Only particle decay can occur..
John
----- Original Message -----
From: wuzhen
To: fluka-discuss@mi.infn.it
Sent: Tuesday, February 25, 2003 21:45
Dear fluka user,
Who knows the difference between BLCKHOLE and VACUUM, these two Fluka materials?
Best regards,
Zhen wu
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