Struct BetheBloch 

pub struct BetheBloch {
    pub effective_charge: EffectiveCharge,
    pub mean_excitation_ev: Option<f64>,
    pub shell_over_z: f64,
    pub density_delta: f64,
    pub density_effect_electron_density_m3: Option<f64>,
    pub no_bloch: bool,
}

Bethe-Bloch model.

Fields

effective_charge: EffectiveCharge

Effective-charge model.

mean_excitation_ev: Option<f64>

Mean excitation energy override, eV.

shell_over_z: f64

Shell correction C / Z2 (dimensionless, added as −C/Z2); default 0.

density_delta: f64

Density-effect δ (dimensionless); default 0.

density_effect_electron_density_m3: Option<f64>

Target electron density (m^-3) for the opt-in single-oscillator density effect; None (default) leaves it off. Added to density_delta.

no_bloch: bool

Include the Bloch term L2 (default: true via BetheBloch::new).

Implementations

impl BetheBloch

pub fn new() -> Self

Bare-charge Bethe-Bloch with Bloch term, Bloch-rule I.

pub fn with_effective_charge(self, m: EffectiveCharge) -> Self

Set the effective-charge model.

pub fn with_mean_excitation_ev(self, i_ev: f64) -> Self

Set the mean excitation energy, eV (cite its source at the call site).

pub fn with_density_effect(self, electron_density_m3: f64) -> Self

Enable the single-oscillator density effect (density_effect_single_oscillator) for a target of electron density n_e (m^-3). The density effect needs a meaningful I: set a cited one with BetheBloch::with_mean_excitation_ev. Opt-in; relevant only at relativistic energies.

pub fn without_bloch(self) -> Self

Drop the Bloch term (pure Bethe).

pub fn bracket( &self, ion: &Ion, target_z: u8, energy_ev: f64, ) -> Result<f64, StoppingError>

Bracket [...] of the formula (dimensionless).

Trait Implementations

impl Clone for BetheBloch

fn clone(&self) -> BetheBloch

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for BetheBloch

impl Debug for BetheBloch

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BetheBloch

fn default() -> BetheBloch

Returns the “default value” for a type.

impl ElectronicStopping for BetheBloch

fn name(&self) -> &'static str

Short stable model name (used in output metadata).

fn stopping( &self, ion: &Ion, target_z: u8, energy_ev: f64, ) -> Result<f64, StoppingError>

Stopping cross section per atom of element target_z, J m².

fn validity(&self, ion: &Ion) -> ValidityRange

Advisory validity range for this ion.

fn sqrt_energy_coefficient(&self, _ion: &Ion, _target_z: u8) -> Option<f64>

If this model is exactly S(E) = c sqrt(E) for this ion and target (the velocity-proportional Lindhard-Scharff form), return c in J m² eV^(-1/2); None (the default) otherwise.

impl PartialEq for BetheBloch

fn eq(&self, other: &BetheBloch) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for BetheBloch