DCYSCORE

Summary

Associates selected scoring detectors​ of given estimator type​ with user-defined decay times or with combined prompt-decay particle scoring. ​ In the first case, see warning in Note  1 below. Also needed for scoring when the source is a radioactive isotope. ​​​ ​​ ​

See also DCYTIMES, IRRPROFIle, RADDECAY, RESNUCLEi

WHAT(1) > 0.0:
cooling time​ index to be associated with the detector(s) of estimator type defined by SDUM and with number (or name) corresponding to WHAT(4)–WHAT(6) (see Note 2 below)
Only allowed when decay is calculated in “activation study” non-analogue mode ​(see Note 1 of RADDECAY and Note 5 below).​
= –1.0

: if option RADDECAY has been requested with WHAT(1) > 1.0, i.e. for radioactive decays activated in semi-analogue mode​, ​ the detectors defined by WHAT(4)–WHAT(6) will score both prompt and radioactive decay particles.​ See Note 6, and 7 for the case where the source has been defined as a radioactive isotope.​

= 0.0 :

no scoring

Default

= 0.0

WHAT(2)

– WHAT(3): not used

WHAT(4) :
lower index bound (or corresponding name) of detectors​ of type SDUM associated with the specified cooling time​ (if WHAT(1) > 0.) or with combined prompt-decay particle scoring (if WHAT(1) = –1.)
(“From detector ``WHAT(4)`` of estimator type ``SDUM``…”)
Default

= 1.0

WHAT(5) :
upper index bound (or corresponding name) of detectors of type SDUM associated with the specified cooling time or with combined prompt-decay particle scoring
(“…to detector ``WHAT(5)`` of estimator type ``SDUM``…”)
Default

= WHAT(4)

WHAT(6) =
step length in assigning indices
(“…in steps of ``WHAT(6)`` ”)
Default

= 1.0

SDUM

: identifies the kind of estimator under consideration: EVENTBIN, RESNUCLEi, USRBDX, USRBIN, USRCOLL, USRTRACK, USRYIELD​

Default

:  no default!

Default

(option DCYSCORE not requested): no particles originated from radioactive decay are scored, in whatever mode decay is being calculated (see Notes 5, 6 and 7 below).

Notes

  1. Warning: when the DCYSCORE option is applied to a detector with WHAT(1) > 0.0, all quantities are expressed per unit time (in seconds). For instance, the RESNUCLEi ​ estimator will output Bq, ​ dose estimators will provide dose rate, etc..​
    If WHAT(1) = –1., all quantities are normalized per unit primary weight, or per decay if the source has been defined as a radioactive isotope.

  2. The cooling time index indicated by WHAT(1) > 0. must be one of those defined by means of option DCYTIMES. ​

  3. USRBIN​ and EVENTBIN​ detectors are similar, therefore they are part of the same index sequence​; this has to be taken into account for the numbering of the detectors. The same holds for USRTRACK​ and USRCOLL​ detectors.

  4. The scoring of decay radiation in “activation study” non-analogue mode (WHAT(1) > 0.0, see Note 1 of RADDECAY) is different from all the rest: decay particles are transported once, and a factor is applied at scoring time depending on the decay time associated to each detector.
    This factor accounts for the buildup and decay of the parent nucleus at the specified decay time. This factor is not available in user routines such as FLUSCW and COMSCW​ ​ (FLUSCW: weighting fluence, current and yield,COMSCW: weighting deposited energy or stars)

  5. If radioactive decay has been requested in “activation study” mode (command RADDECAY with WHAT(1) = 1) particles originated from radioactive decay are scored at cooling times requested with DCYTIMES. Command DCYSCORE, called with WHAT(1) > 0.0, is used to associate a detector of type SDUM to a particular cooling time. If DCYSCORE is not present, no particles originated from radioactive decay can be scored.

  6. If radioactive decay has been requested in “semi-analogue” mode (Monte Carlo sampling: command RADDECAY with WHAT(1) > 1.0), particles originated from radioactive decay are scored by the selected detectors of type SDUM together with prompt particles, provided DCYSCORE is issued with WHAT(1) = –1.0. If DCYSCORE is not present, no particles originated from radioactive decay can be scored, and any detector will score only prompt particles.

  7. If the source has been defined as a radioactive isotope (see command BEAM with SDUM = ISOTOPE), the radioactive decay must be activated in semi-analogue mode (see Note 1 of RADDECAY), and therefore WHAT(1) of DCYSCORE must be = –1.0. This can be considered as a special case of the situation described in Note 6, where only decay particles are present, and no prompt particles. Also in this case, if DCYSCORE is not present no particles originated from radioactive decay can be scored. And since no prompt particles are present, no scoring at all can take place.

Example, for a number-based input:

*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+...
DCYTIMES      86400.   172800.
DCYSCORE          1.        0.        0.        4.        8.        2.USRBIN
DCYSCORE          2.        0.        0.        1.        5.          USRTRACK
* Two cooling times have been defined. Binnings no. 4, 6 and 8 will be
* associated to the first cooling time (one day), and track-length detectors
* no. 1, 2, 3, 4 and 5 will be associated to the second cooling time (2 days)

The same example, in a name-based input:

DCYTIMES      86400.   172800.
DCYSCORE          1.        0.        0.  binning4  binning8        2.USRBIN
DCYSCORE          2.        0.        0.  trakDet1  trakDet5          USRTRACK