Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Carbon (Z=6)
  12C   13C   14C
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
12C 13C




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.00.0143 ± 0.0011--
0.00.0154 ± 0.0010--

(Version 0.0 corresponds to Bao et al.)
Comment
KNS98 includes a d-wave component and parameterizes the MACS as MACS(kT) = 17.3/kT^0.5 + 2.01*kT^0.5 + 6e-4* kT^1.5.
Last review: January 23rd, 2013
List of all available values
originalrenorm.yeartypeCommentRef
0.0289 ± 0.0023
E(n)= 550 keV
0.0143 ± 0.00111998cPelletron, TOF, 6Li, Au:B-VI; uses d-wave DRC for E>100 keV.KNS98
0.0119 - 0.0216
E(n)= 12 - 250 keV
0.0154 ± 0.00101994cPelletron, TOF, 6Li, Au:B-V MaG67b; uses only s- and p-wave DRC.ONI94
0.0168 ± 0.0021
1991cPelletron, TOF, 6Li, Au:B-V MaG67bNIT91
0.0121 ± 0.0032
1990cLinac, TOF, 6Li, Au:Sat.; lower limit by 1/v extrapolationMac90
0.2 ± 0.4
1971eAGM71
0.015
2005eJEFF 3.0A; Fits data from ONI94 and KNS98.jeff30A


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
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
0.0122
0.0118
0.0118
0.0123
0.0129
0.0136
0.0143 ± 0.0011
0.0156
0.0169
0.0181
0.0203
0.0224
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
7.51
9.19
10.27
13.11
15.88
18.72
21.56
27.16
32.89
38.59
49.98
61.66

MACS:
Reference: KNS98
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: 1998

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
12O
0.00 ms
P
13O
8.58 ms
β+
14O
1.18 m
β+
15O
2.04 m
β+
16O
99.762
0.038 mb
11N
0.00 ms
P
12N
11.00 ms
β+
13N
9.96 m
β+
14N
99.634
0.041 mb
15N
0.366
0.0058 mb
10C
19.26 s
β+
11C
20.33 m
β+
12C
98.89
0.0154 mb
13C
1.11
0.021 mb
14C
5.70 ka
0.00848 mb, β-
9B
0.00 ms
P
10B
19.8
11B
80.2
12B
20.20 ms
β-
13B
17.30 ms
β-
8Be
0.00 ms
α
9Be
100
0.0104 mb
10Be
1.51 Ma
β-
11Be
13.81 s
β-
12Be
21.50 ms
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Carbon