Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Oxygen (Z=8)
  16O   17O   18O
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
17O 18O




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.00.0039 ± 0.0010*--

(Version 0.0 corresponds to Bao et al.)
Comment
New dataset in v1.0. No experimental data available, used calculated values from latest calculation in jeff32 which uses the TARES1.1 code for the resolved resonance region and TALYS for the unresolved region. Assumed uncertainty of 25%.
Last review: April 2016
List of all available values
originalrenorm.yeartypeCommentRef
0.0039
2014tJEFF 3.2, uses TALYS calculationsjeff32
0.0047
2011tENDF/B-VII.1endfb71
0.0021
2005tJEFF 3.0Ajeff30A
0.0047
2004tJEFF 3.1jeff31


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:
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
0.0028
-
0.0012
0.0007
0.0009
0.0020
0.0039 ± 0.0010
0.0095
0.0153
0.0201
0.0257
0.0275
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
1.70
-
1.03
0.74
1.10
2.72
5.81
16.35
29.44
42.37
62.55
74.83

MACS:
Reference: jeff32
Procedure: 't' (The MACS from kT=5 keV to 100 keV are obtained from theoretical calculations with corresponding uncertainties between 25 and 50% in most cases.)
Year: 2014

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: 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 102 cm3/mole/s, including SEF
Chart of nuclei
up
left
17Ne
109.00 ms
β+
18Ne
1.67 s
β+
19Ne
17.22 s
β+
20Ne
90.48
0.119 mb
21Ne
0.27
1.5 mb
16F
0.00 ms
P
17F
1.07 m
β+
18F
1.83 h
β+
19F
100
5.8 mb
20F
11.07 s
β-
15O
2.04 m
β+
16O
99.762
0.038 mb
17O
0.038
18O
0.2
0.00886 mb
19O
26.88 s
β-
14N
99.634
0.041 mb
15N
0.366
0.0058 mb
16N
7.13 s
β-
17N
4.17 s
β-
18N
624.00 ms
β-
13C
1.11
0.021 mb
14C
5.70 ka
0.00848 mb, β-
15C
2.45 s
β-
16C
747.00 ms
β-
17C
193.00 ms
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Oxygen