Struct ParticlePair 

pub struct ParticlePair {
    pub ma: f64,
    pub mb: f64,
    pub za: f64,
    pub zb: f64,
    pub ia: f64,
    pub ib: f64,
    pub q: f64,
    pub pnt: i32,
    pub shf: i32,
    pub mt: u32,
    pub pa: f64,
    pub pb: f64,
}

Particle pair definition for LRF=7 R-Matrix Limited.

Identifies the two particles in a reaction channel (e.g., neutron + W-184, or gamma + W-185). Used to determine which channels are entrance (neutron) channels and which are exit (fission, capture) channels.

Reference: ENDF-6 Formats Manual §2.2.1.6, Table 2.2

Fields

ma: f64

Mass of particle a (neutron = 1.0, in neutron mass units).

mb: f64

Mass of particle b (target nucleus, in neutron mass units).

za: f64

Charge number Z of particle a, as stored in the ENDF LRF=7 particle-pair list. ENDF LRF=7 stores the charge directly: neutron/photon = 0, proton = 1, alpha = 2. Reference: SAMMY rml/mrml03.f — Docoul = Kzb * Kza (product of charges).

zb: f64

Charge number Z of particle b (target or recoil), as stored in ENDF LRF=7.

ia: f64

Spin of particle a (1/2 for neutron).

ib: f64

Spin of particle b (target spin I).

q: f64

Q-value for this reaction (eV). 0 for elastic.

pnt: i32

Penetrability flag (ENDF PNT, SAMMY Lpent).

PNT=1: calculate penetrability P_c and shift S_c analytically (Blatt-Weisskopf / Coulomb). Used for open particle channels. PNT=0: no penetrability — the channel contributes only the Ymat(2,Ii) -= 1 term (SAMMY rml/mrml07.f:118-122), encoded here as P_c=1, S_c=B_c. Always the case for the photon/eliminated channel. PNT∉{0,1} is rejected at parse time (SAMMY Check_Quantum, rml/mrml03.f:22).

shf: i32

Shift factor flag.

SHF=1: calculate shift factor S_c analytically (Blatt-Weisskopf). SHF=0: do not calculate; treat S_c = B_c so (S_c − B_c) = 0 in level matrix.

mt: u32

ENDF MT number identifying the reaction (2=elastic, 18=fission, 102=capture).

pa: f64

Parity of particle a.

pb: f64

Parity of particle b.

Trait Implementations

impl Clone for ParticlePair

fn clone(&self) -> ParticlePair

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParticlePair

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ParticlePair

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ParticlePair

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

where __S: Serializer,

Serialize this value into the given Serde serializer.