What exact meanings of the parameters?

Physics Processes, Models and Cross Sections
1

the codes below are from “Book For Application Developers”, version 10.7, page 246:

G4Material* Scnt = new G4Material(/…/);
std::vector energy = { 6.6eV, 6.7eV, 6.8eV, 6.9eV,
7.0eV, 7.1eV, 7.2eV, 7.3eV, 7.4eV };
std::vector Scnt_FAST = { 0.000134, 0.004432, 0.053991, 0.241971,
0.398942, 0.000134, 0.004432, 0.053991,
0.241971 };
std::vector Scnt_SLOW = { 0.000010, 0.000020, 0.000030, 0.004000,
0.008000, 0.005000, 0.020000, 0.001000,
0.000010 };
G4MaterialPropertiesTable Scnt_MPT = new G4MaterialPropertiesTable();
Scnt_MPT->AddProperty(“FASTCOMPONENT”, energy, Scnt_FAST);
Scnt_MPT->AddProperty(“SLOWCOMPONENT”, energy, Scnt_SLOW);
Scnt_MPT->AddConstProperty(“SCINTILLATIONYIELD”, 5000./MeV);
Scnt_MPT->AddConstProperty(“RESOLUTIONSCALE”, 2.0);
Scnt_MPT->AddConstProperty(“FASTTIMECONSTANT”, 1.*ns);
Scnt_MPT->AddConstProperty(“SLOWTIMECONSTANT”, 10.*ns);
Scnt_MPT->AddConstProperty(“YIELDRATIO”, 0.8);
Scnt->SetMaterialPropertiesTable(Scnt_MPT);

the energy spectrum “Scnt_MPT->AddProperty(“FASTCOMPONENT”, energy, Scnt_FAST)” and “Scnt_MPT->AddProperty(“SLOWCOMPONENT”, energy, Scnt_SLOW)”, but what exact meanings of { 0.000134, 0.004432, 0.053991, 0.241971,
0.398942, 0.000134, 0.004432, 0.053991,
0.241971 } and { 0.000010, 0.000020, 0.000030, 0.004000,
0.008000, 0.005000, 0.020000, 0.001000,
0.000010 } from
std::vector Scnt_FAST = { 0.000134, 0.004432, 0.053991, 0.241971,
0.398942, 0.000134, 0.004432, 0.053991,
0.241971 } and
std::vector Scnt_SLOW = { 0.000010, 0.000020, 0.000030, 0.004000,
0.008000, 0.005000, 0.020000, 0.001000,
0.000010 }

2

FASTCOMPONENT and SLOWCOMPONENT give the spectrum of emitted optical photons, for the two decay channels.

3

what is exactly the spectrum? the data means at 6.6eV the relative fluorescence photon numbers are 0.000134 for FASTCOMPONENT and 0.000010 for SLOWCOMPONENT? for other energy, the fluorescence photon numbers follow this?

4

There are two parallel threads going here. Let’s close this one, and continue the discussion here:

6

Discussion moved to What are meanings of the parameters?