Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Hydrogen (Z=1)
  1H   2H
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
1H 2H




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.00.254 ± 0.020--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
0.254 ± 0.020
1995bPelletron, TOF, Au:ENDF/B-VI and MaG67bSNS95
0.152
2006eendfb7
0.153
2004ejeff31
0.153
2002ejendl33


Original:MACS [<σ v>/vT] (mb) for kT=30 keV, based on the published cross sections except where indicated otherwise.
Renorm:MACS [<σ v>/vT] (mb) for kT=30 keV for which the reference or standard cross section was meanwhile improved.
Type: The letters and numbers in the column labelled 'type' give information on how the cross section has been obtained:
bCalculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
eEvaluated value taken directly from the reference
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
0.87
0.53
0.40
0.33
0.285
0.254 ± 0.020
0.215
0.193
0.178
0.162
0.153
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
7.28
6.27
5.79
5.52
5.33
5.20
5.09
5.10
5.16
5.42
5.72

MACS:
Reference: SNS95
Procedure: 'e' (The Maxwellian-averaged cross sections (MACS) from kT=5 keV to 100 keV are obtained from experimental data; the relative uncertainties are similar to those quoted for the 30 keV data.)
Year: 1995

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:
. Please note: SEF for this element have not been calculated but are expected to be close to 1.
Rate:
Reaction rate NA<σv> given in 104 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
4Li
0.00 ms
P
5Li
0.00 ms
α
3He
0.000137%
0.0076 mb
4He
99.9999%
1H
99.985%
0.254 mb
2H
0.015%
3H
12.32 a
β-
1Nn
10.24 m
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Hydrogen