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)
2H 3H




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.00.00257 ± 0.00021--
0.30.0030 ± 0.0002--
0.0---

(Version 0.0 corresponds to Bao et al.)
Comment
New dataset in v0.3. Reaction rate parameterized as RR(cm^3 /sec /mole) = 214*T9^0.075
+ 742*T9 with T9 being the temperature in GK (NKS06).
Last review: April 5th, 2012
List of all available values
originalrenorm.yeartypeCommentRef
0.00223 ± 0.00034
E(n)= 30.5 keV
2006cPelletron, TOF, 6Li, Au:ENDF/B-VI and MaG67bNKS06
0.0019 ± 0.0003
E(n)= 52 keV
2008cPelletron, TOF, 6Li, Au:ENDF/B-VI and MaG67bOIN08
0.00199 ± 0.00025
E(n)= 54.2 keV
2006cPelletron, TOF, 6Li, Au:ENDF/B-VI and MaG67bNKS06
0.001989
2011eENDF/B-VII.1endfb71
0.002351
2011eJENDL-4.0jendl40
0.001989
2004eJEFF 3.1jeff31
0.0028
1967tFCZ67


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
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
0.0030
-
0.0026
0.0025
0.0025
0.0025
0.0026 ± 0.0002
0.0027
0.0028
0.0029
0.0031
0.0033
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
2.17
-
2.66
3.14
3.62
4.05
4.61
5.53
6.41
7.28
8.98
10.69

MACS:
Reference: NKS06
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: 2006,2012

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 102 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
6Li
7.59
3He
0.000137
0.0076 mb
4He
99.9999
5He
0.00 ms
α
1H
99.985
0.254 mb
2H
0.015
3H
12.32 a
β-
4H
0.00 ms
N
1Nn
10.24 m
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Hydrogen