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Radiative transition description

A single transition is described in the <Processes><Radiative> table as a <RadiativeTransition> block. For example (truncated for clarity):

  <RadiativeTransition id="PCDMS-R7452690" process="excitation">
    <EnergyWavelength>
      <Frequency methodRef="MCDMS-6648">
        <SourceRef>BCDMS-344</SourceRef>
        <Value units="MHz">104711.4035</Value>
        <Accuracy>0.0057</Accuracy>
      </Frequency>
      <Frequency methodRef="MCDMS-6646">
        <Value units="MHz">104711.3656</Value>
        <Accuracy>0.0003</Accuracy>
      </Frequency>
    </EnergyWavelength>
    <UpperStateRef>SCDMS-9240239</UpperStateRef>
    <LowerStateRef>SCDMS-9240238</LowerStateRef>
    <SpeciesRef>XCDMS-132</SpeciesRef>
    <Probability>
      <TransitionProbabilityA>
        <Value units="1/cm">5.45485286998e-08</Value>
      </TransitionProbabilityA>
    </Probability>
  </RadiativeTransition>

Note that the species (SpeciesRef), the lower level ( LowerStateRef), and the upper level (UpperStateRef) are identified by their unique identifiers which backpoint to the given species in the <Molecules> table. The measured frequency is described in a <Frequency> block. There can be several frequencies for a single transition, measured by several sources.



Gildas manager 2023-06-01