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defectpl.constants

All physical constants follow CODATA 2018.

constants

Physical constants and unit conversion factors for the defectpl package.

References and underlying constant values align precisely with the CODATA internationally recommended values. Derived parameters are calculated using exact conversion formulas to maintain absolute mathematical consistency across energy and mass spaces.

Attributes:

Name Type Description
ELEMENTARY_CHARGE float

The elementary charge (\(e\)) in Coulombs (C).
PLANCK_CONSTANT float

The Planck constant (\(h\)) in Joule-seconds (J·s).
HBAR_JS float

The reduced Planck constant (\(\hbar\)) in Joule-seconds (J·s).
HBAR_EVS float

The reduced Planck constant (\(\hbar\)) in Electron-volt-seconds (eV·s).
THZ2EV float

Conversion factor transforming frequency in Terahertz (THz) directly into energy equivalents in Electron-volts (eV). Derived as \(h \times 10^{12} / e\).
AMU2KG float

Conversion factor mapping Unified Atomic Mass Units (amu or Da) into Kilograms (kg).
ANG2M float

Conversion factor scaling length from Angstroms (Å) to Meters (m).
EV2MEV float

Conversion factor scaling Electron-volts (eV) to Millielectron-volts (meV).
EV2J float

Conversion factor mapping Electron-volts (eV) into Joules (J). Identical to the numeric scale of the elementary charge.

ELEMENTARY_CHARGE module-attribute 

ELEMENTARY_CHARGE = 1.602176634e-19

Elementary charge (e) in Coulombs (C). Exact CODATA definition.

PLANCK_CONSTANT module-attribute 

PLANCK_CONSTANT = 6.62607015e-34

Planck constant (h) in Joule-seconds (J·s). Exact CODATA definition.

AMU2KG module-attribute 

AMU2KG = 1.6605390666e-27

Conversion factor from Atomic Mass Units (amu) to Kilograms (kg).

ANG2M module-attribute 

ANG2M = 1e-10

Conversion factor from Angstroms (Å) to Meters (m). Exact metric scale.

EV2MEV module-attribute 

EV2MEV = 1000.0

Conversion factor from Electron-volts (eV) to Millielectron-volts (meV).

EV2J module-attribute 

EV2J = ELEMENTARY_CHARGE

Conversion factor from Electron-volts (eV) to Joules (J).

HBAR_JS module-attribute 

HBAR_JS = PLANCK_CONSTANT / (2.0 * 3.141592653589793)

Reduced Planck constant (hbar) in Joule-seconds (J·s).

HBAR_EVS module-attribute 

HBAR_EVS = HBAR_JS / EV2J

Reduced Planck constant (hbar) in Electron-volt-seconds (eV·s).

THZ2EV module-attribute 

THZ2EV = PLANCK_CONSTANT * 1000000000000.0 / EV2J

Conversion factor from Terahertz (THz) to Electron-volts (eV).