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[ <--- prev -- ] [ HOME ] [ -- next ---> ] PART-THRessets different energy transport cutoffs for hadrons, muons and
neutrinos
For WHAT(5) = 0.0 : WHAT(1) < 0.0 : kinetic energy cutoff (GeV) > 0.0 : momentum cutoff (GeV/c) For WHAT(5) >= 1.0 : WHAT(1) < 0.0 : gamma cutoff (Lorentz factor, = E/mc**2) > 0.0 : eta cutoff (= beta*gamma = v/c E/mc**2) Default (WHAT(1) = 0.0): the cutoff is 0 for neutrinos, and 1.E-14 GeV for neutrons. For any other hadrons, and for muons: if option DEFAULTS is missing, or is present with SDUM = NEW-DEFAults or SHIELDINg, the default cutoff kinetic energy is 0.01 GeV. If SDUM = HADROTHErapy, ICARUS or PRECISIOn, the default cutoff kinetic energy is 0.0001 GeV. If SDUM = CALORIMEtry, the default cutoff kinetic energy is = 0.001 * m/m_p GeV (m = particle mass, m_p = proton mass) In any other case, the default cutoff is 0.050 GeV. (For e+e- and photons the threshold is set by EMFCUT, see Note 3 below). WHAT(2) = lower bound of the particle id-numbers to which the cutoff applies ("From particle WHAT(2)..."). Default = 1.0 WHAT(3) = upper bound of the particle id-numbers to which the cutoff applies ("...to particle WHAT(3)..."). Default = WHAT(2) WHAT(4) = step length in assigning numbers ("...in steps of WHAT(4)") Default = 1.0. WHAT(5) : depending on its value, cutoff values indicated by WHAT(1) are assigned to kinetic energy, momentum, gamma or eta (see WHAT(1)) WHAT(6) = 1.0 restricts the given cutoff to charged particles only Default: the cutoff applies to all particles indicated by WHAT(2-4) SDUM : not used Default (option PART-THR not given): thresholds as described above for WHAT(1) = 0.0. Notes:
Example: * A threshold of 2 MeV (kinetic energy) is requested for heavy charged * particles with id-numbers between 1 and 11 (protons, antiprotons and * muons). A threshold of Gamma (E/m) = 2 will apply for pions and kaons * (numbers from 13 to 16). For all other particles, the defaults will apply. *...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8 PART-THR -0.002 1.0 11.0 0.0 0.0 1.0 PART-THR -2.0 13.0 16.0 1.0 1.0 0.0 |
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