Projectile:
Section for projectile nucleus. The projectile will start at \(z < 0\) and fly in positive \(z\)-direction, at \(x \ge 0\).

Target:
Section for target nucleus. The target will start at \(z > 0\) and fly in negative \(z\)-direction, at \(x \le 0\).

Projectile: and Target:

Particles (int:int, int:int, required):
A map in which the keys are PDG codes and the values are number of particles with that PDG code that should be in the current nucleus. E.g. Particles: {2212: 82, 2112: 126} for a lead-208 nucleus (82 protons and 126 neutrons = 208 nucleons), and Particles: {2212: 1, 2112: 1, 3122: 1} for Hyper-Triton (one proton, one neutron and one Lambda).

Diffusiveness (double, optional, default = (0.545 for A <= 16; 0.54 for A > 16)):
Diffusiveness of the Woods Saxon distribution for the nucleus in fm.

Radius (double, optional, default = proton_rad * A^(1/3)):
Radius of nucleus in fm. The default radius is calculated as the proton radius times the third root of the number of nucleons.

Saturation_Density (double, optional, default = 0.168):
Saturation density of the nucleus in 1/fm^3.

Deformed:
- Automatic (bool, required if Deformed exists, no default):
  true - Set parameters of spherical deformation based on mass number of the nucleus.
  flase - Manually set parameters of spherical deformation. This requires the additional specification of Beta_2, Beta_4, Theta and Phi, which follow Moller:1993ed.
- Beta_2 (double, optional):
  The deformation coefficient for the spherical harmonic Y_2_0 in the beta decomposition of the nuclear radius in the deformed woods-saxon distribution.
- Beta_4 (double, optional):
  The deformation coefficient for the spherical harmonic Y_4_0.
- Theta (double, optional):
  The polar angle by which to rotate the nucleus.
- Phi (double, optional):
  The azimuthal angle by which to rotate the nucleus.
Example: Configuring a deformed nucleus

To configure a fixed target heavy-ion collision with deformed nuclei, whose spherical deformation is explicitly declared, it can be done according to the following example. For explanatory (and not physics) reasons, the projectile's Woods Saxon distribution is initialized automatically and it's spherical deformation manually, while the target nucleus is configured just the opposite.

Modi:
    Collider:
        Projectile:
            Particles:    {2212: 29, 2112: 34}
            Deformed:
                # Manually set deformation parameters
                Automatic: False
                Beta_2: 0.1
                Beta_4: 0.3
                Theta: 0.8
                Phi: 0.02
        Target:
            Particles:    {2212: 29, 2112: 34}
            # manually set woods saxon parameters
            Saturation_Density: 0.1968
            Diffusiveness: 0.8
            Radius: 2.0
            Deformed:
                # Automatically set deformation parameters
                Automatic: True
        E_kin: 1.2
        Calculation_Frame: "fixed target"

Example: Configuring a deformed nucleus