Struct ResonanceRange 

pub struct ResonanceRange {
    pub energy_low: f64,
    pub energy_high: f64,
    pub resolved: bool,
    pub formalism: ResonanceFormalism,
    pub target_spin: f64,
    pub scattering_radius: f64,
    pub naps: i32,
    pub ap_table: Option<Tab1>,
    pub l_groups: Vec<LGroup>,
    pub rml: Option<Box<RmlData>>,
    pub urr: Option<Box<UrrData>>,
    pub r_external: Vec<RExternalEntry>,
}

A single energy range within the resolved resonance region.

Fields

energy_low: f64

Lower energy bound (eV).

energy_high: f64

Upper energy bound (eV).

resolved: bool

Resolved (true) or unresolved (false).

formalism: ResonanceFormalism

Resonance formalism used in this range.

target_spin: f64

Target spin (I).

scattering_radius: f64

Scattering radius (fm).

Constant value from the ENDF CONT header AP field. When ap_table is Some, use scattering_radius_at(energy_ev) instead of reading this field directly — the table provides the energy-dependent value, clamping to the nearest endpoint for energies outside the table range. This constant is only used when ap_table is None (NRO=0).

naps: i32

NAPS flag: scattering radius calculation control.

NAPS=0: use the channel radius for penetrability/shift calculations. NAPS=1: use the scattering radius (AP or AP(E)) for penetrability/shift. Reference: ENDF-6 Formats Manual §2.2.1

ap_table: Option<Tab1>

Energy-dependent scattering radius AP(E) (fm), present when NRO=1.

ENDF-6 §2.2.1: when NRO≠0 a TAB1 record immediately follows the range CONT header to give AP(E) as a piecewise function. At each energy the table value replaces the constant scattering_radius in penetrability, shift, and hard-sphere phase calculations.

None when the range has NRO=0 (constant AP).

Reference: ENDF-6 Formats Manual §2.2.1; SAMMY mlb/mmlb1.f90

l_groups: Vec<LGroup>

Spin groups for LRF=1/2/3 (L-grouped). Empty for LRF=7 and LRU=2.

rml: Option<Box<RmlData>>

R-Matrix Limited data for LRF=7. None for LRF=1/2/3 and LRU=2.

urr: Option<Box<UrrData>>

Unresolved Resonance Region data (LRU=2). None for all LRU=1 ranges.

When Some, cross-sections are computed via the Hauser-Feshbach formula in nereids_physics::urr::urr_cross_sections.

r_external: Vec<RExternalEntry>

R-external (background R-matrix) entries per spin group.

Diagonal, real-valued corrections to the R-matrix that approximate the effect of distant (unresolved) resonances. Keyed by (L, J).

Populated from SAMMY’s “R-EXTERNAL PARAMETERS FOLLOW” section. Empty for ENDF-only data or SAMMY cases without R-external.

SAMMY Ref: Manual Section II.B.1.d, mpar03.f90 Readrx

Implementations

impl ResonanceRange

pub fn scattering_radius_at(&self, energy_ev: f64) -> f64

Scattering radius at a given neutron energy.

Returns the interpolated value from ap_table when NRO=1 (energy-dependent radius), or the constant scattering_radius when NRO=0.

Use this method in all physics calculations that need the channel radius, rather than reading scattering_radius directly.

Arguments

• energy_ev — Lab-frame neutron energy in eV.

pub fn resonance_count(&self) -> usize

Total resonance count for this range (works for both LRF=1/2/3 and LRF=7).

Trait Implementations

impl Clone for ResonanceRange

fn clone(&self) -> ResonanceRange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResonanceRange

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ResonanceRange

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ResonanceRange

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.