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TIME-CUT


     Sets transport time cutoffs for different particles

     See also TCQUENCH

     
WHAT(1)
= transport time cutoff (nsec)
Default
: no cut off
WHAT(2)
= transport time cutoff delay (nsec)
Default
= 0.0
WHAT(3)
= material number for the "start" signal from which time is measured (useful for calorimetry) (Not implemented at present)
Default
: "start" at creation time
WHAT(4)
= lower bound of the particle numbers (or corresponding name) for which the transport time cutoff and/or the start signal is to be applied ("From particle
WHAT(4)
...").
Default
= 1.0
WHAT(5)
= upper bound of the particle numbers (or corresponding name) for which the transport time cutoff and/or the start signal is to be applied ("...to particle
WHAT(5)
...").
Default
=
WHAT(4)
if
WHAT(4)
> 0, all particles otherwise.
WHAT(6)
= step length in assigning numbers. ("...in steps of
WHAT(6)
").
Default
= 1.0
SDUM
: not used
Default
(option TIME-CUT not given): no time cutoff for particle transport
Notes:
1) The transport time cutoff should not be confused with the time cutoff for scoring (see TCQUENCH). 2) Particles outside the time gate defined by TIME-CUT are discarded (a summary is printed at the end of the standard output). 3) If the source has been defined as a radioactive isotope (command BEAM with
SDUM
= ISOTOPE), transport of each isotope decay secondary starts with an age equal to the time of decay.
Example:
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+...
TIME-CUT 3000.0 0.0 0.0 8.0 0.0 0.0
* Stop transporting neutrons after 3000 nsec

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