negativeIonDetachment

Negative Ion Detachment

Works with a VSimPD license. Collision of the form

\[A^- + B \rightarrow A + B + e\]

Any RxnProcess Block block which points to a productGenerator of kind = negativeIonDetachment should have the Reactants and Products in the order

reactants = [speciesNegativeA speciesB]
products = [speciesA speciesB electron]

negativeIonDetachment Attributes

thresholdEnergy (float, optional, default = 0)

The threshold energy for the reaction in eV. So, a pair of reactants will need at least this much relative energy (ie energy in center of momentum frame) in order to react. If the reaction occurs then this much energy is lost.

anisotropy (float, optional, default = 0)

A value between -1 and 1 to set the degree of anisotropy. An anisotropy of -1 is full backscatter, 0 is isotropic, and +1 is full forward scatter.

randomSeed (int, optional, default: random int)

Manually set a random seed used to determine the final velocities of the product particles.

The default is to choose a random seed at run time. To produce identical simulations, advanced users may want to manually set a seed. It is recommended not to include this parameter so that a different random number will be generated for each run.

Example negativeIonDetachment Block

<RxnProductGenerator productGenerator>
  kind = negativeIonDetachment
  #thresholdEnergy = 1.0
  #anisotropy = 0.0
  #randomSeed = 477
</RxnProductGenerator>