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]
1.00.154 ± 0.015--
0.00.254 ± 0.020--

(Version 0.0 corresponds to Bao et al.)
Comment
Total cross section from NSG01, fitted to experimental data. Assumed 10 % uncertainty like in TNS03.
Last review: April 24th, 2012
List of all available values
originalrenorm.yeartypeCommentRef
0.089 - 0.077
E(n)= 80-376 keV
2003cPelletron, TOF, Au:ENDF/B-VI and MaG67bTNS03
0.0352 ± 0.0024
E(n)= 517-583 keV
1997cPelletron, TOF, Au:ENDF/B-VI and MaG67bNSK97
0.254 ± 0.020
1995bPelletron, TOF, Au:ENDF/B-VI and MaG67bSNS95
0.318 - 0.151
E(n)= 10-80 keV
1995cPelletron, TOF, Au:ENDF/B-VI and MaG67bSNS95
0.153
2011eENDF/B-VII.1endfb71
0.153
2011eJENDL 4.0jendl40
0.153
2004eJEFF 3.1jeff31
0.154
2001tFits data from SNS95,NSK97,TNS03. NSG01


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:
cDirectly quoted from the reference itself
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
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
0.483
-
0.319
0.246
0.203
0.175
0.154 ± 0.015
0.126
0.108
0.095
0.080
0.071
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
4.04
-
3.77
3.56
3.40
3.27
3.15
2.98
2.86
2.75
2.68
2.66

MACS:
Reference: NSG01,SNS95,TNS03,NSK97
Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.)
Year: 2001

X-factor:
Please note: X-factors for this element have not been calculated but are expected to be close to 1.

SEF (Stellar enhancement factor):
Reference:
Year:
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
Chart of nuclei
up
left
3Li
0.00 ms
P
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: (S, M, L, XL or Alberto)


Isotope: Hydrogen