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
|
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 | Emean (K) | Emin (K) | Emax (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). |
|
Emean (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
