He

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Species data

Common Formula	He
Stoichiometric Formula	He
Name	Helium atom
Mass	4.00260 a.m.u
Charge	0
CAS	7440-59-7
Inchi	InChI=1S/He
InchiKey	SWQJXJOGLNCZEY-UHFFFAOYSA-N
State	Ground State

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KIDA He

ISM Abundance

log₁₀ Abundance	Reference	Source Name	Source Type	Link

Polarizability

Evaluation	Definition	Value (Å³)	Method	Origin	Reference
	total	0.20505 ±3.0E-6	Reviews and Evaluations	Bibliography	Schwerdtfeger, Peter et al. ;2019;Molecular Physics;117, 1200-1225
	total	0.20495	Calculations	Bibliography	Lide, D. R.. ;2001;

Definition: total Value (Å³): 0.20505 ±3.0E-6 Method: Reviews and Evaluations Origin: Bibliography Reference: Schwerdtfeger, Peter et al. ;2019;Molecular Physics;117, 1200-1225
Definition: total Value (Å³): 0.20495 Method: Calculations Origin: Bibliography Reference: Lide, D. R.. ;2001;

Dipole moment

Evaluation	Value (D)	Method	Origin	Reference
	0	N/A	Database : NIST COMPUTATIONAL CHEMISTRY COMPARISON AND BENCHMARK DATABASE

Value (D): 0 Method: N/A Origin: Database : NIST COMPUTATIONAL CHEMISTRY COMPARISON AND BENCHMARK DATABASE Reference:

Enthalpy of formation

Evaluation	T (K)	Value (kJ.mol^-1)	Method	Origin	Reference
	0	0	Reviews and Evaluations	Database : Burcat
	298	0	Reviews and Evaluations	Database : Burcat
	298	0	N/A	Database : CCCBDB (http://cccbdb.nist.gov/)
	0	0	N/A	Database : CCCBDB (http://cccbdb.nist.gov/)

T (K): 0 Value (kJ.mol^-1) : 0 Method: Reviews and Evaluations Origin: Other database Reference:
T (K): 298 Value (kJ.mol^-1) : 0 Method: Reviews and Evaluations Origin: Other database Reference:
T (K): 298 Value (kJ.mol^-1) : 0 Method: N/A Origin: Other database Reference:
T (K): 0 Value (kJ.mol^-1) : 0 Method: N/A Origin: Other database Reference:

Desorption energy

Evaluation	E_mean (K)	E_min (K)	E_max (K)	Pre-exponential factor (s^-1)	Order factor	Method	Origin	Reference	Type of surface	Description
	100	0	0	0.00E+0	1	Estimation	Database : OSU		H2O	This binding energy was listed in the original OSU gas-grain code from Eric Herbst group in 2006. The pre-exponential factor is not given. It can be computed using the formula given in Hasegawa et al. (1992).

E_mean (K): 100 E _min (K): 0 E _max (K): 0 Pre-exponential factor (s^-1): 0.00E+0 Method: Estimation Origin: Other database Reference: Type of surface: H2O Description: This binding energy was listed in the original OSU gas-grain code from Eric Herbst group in 2006. The pre-exponential factor is not given. It can be computed using the formula given in Hasegawa et al. (1992). Evaluation:

Diffusion energy

No data