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EMFFLUO


    Activates a detailed treatment of photoelectric interactions and of
    the following atomic deexcitation, with production of fluorescence
    X-rays (and a rough treatment of Auger electrons)

    See also EMF

    This option, meaningful only if the EMF option has been requested
    (explicitly or implicitly via option DEFAULTS), requires a special
    unformatted file, pre-connected as logical input unit 13 (see Chap. 3}).
    This file is delivered with the FLUKA code.

     
WHAT(1)
>= 0: set fluorescence on < 0 : set fluorescence off = 0 : ignored
Default
= -1.0 (no fluorescence) if option DEFAULTS is not used, or if it is used with anything but CALORIMEtry, EM-CASCAde, ICARUS or PRECISIOn. If DEFAULTS is used with a
SDUM
value equal to one of the latter, the default is 1.0 (fluorescence on).
WHAT(2)
= lower bound (or corresponding name) of the material indices in which fluorescence is activated ("From material
WHAT(2)
...")
Default
= 3.
WHAT(3)
= upper bound (or corresponding name) of the material indices in which fluorescence is activated ("... to material
WHAT(3)
...")
Default
=
WHAT(2)
WHAT(4)
= step length in assigning indices ("...in steps of
WHAT(4)
")
Default
= 1.
WHAT(5)
,
WHAT(6)
,
SDUM
: not used
Default
(option EMFFLUO not requested): fluorescence is not simulated unless option DEFAULTS is chosen with
SDUM
= CALORIMEtry, EM-CASCAde, ICARUS or PRECISIOn.
Notes:
1) Selection of EMFFLUO option is only meaningful for a material defined with electron and photon cutoffs lower than the highest K-edge in the elements constituents of that material. 2) When EMFFLUO is activated for a compound material, if the incident photon energy is lower than the highest K-edge for any constituent element, FLUKA uses separate parameterised representations of the photoelectric cross section between different edges of each constituent element (all levels are tabulated). If the photon energy is higher than the highest K-edge, average cross sections for the compound are used, but FLUKA still samples a single element on which to interact, in order to generate the correct fluorescence photon or Auger electron. Example (number-based):
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7...
EMF EMFCUT 1.E-5 1.E-5 0.0 17. 18. EMFFLUO 1.0 17. 18.
* In the above example, the user activates fluorescence production in
* Lead and Tantalum (standard FLUKA material numbers 17 and 18). The
* photon and electron cutoff has been set at 10 keV (the K-edge for
* Pb and Ta is of the order of 100 keV).
The same example, name-based: EMF EMFCUT 1.E-5 1.E-5 0.0 LEAD TANTALUM EMFFLUO 1.0 LEAD TANTALUM

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