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)
13C 14C




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.00.0287 ± 0.0030--
0.00.021 ± 0.004--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is taken from WBB16. This paper uses a "best fit" to the 152 keV resonance. A remeasurement of this cross section with TOF methods is desired to confirm this result.
Last review: April 2016
List of all available values
originalrenorm.yeartypeCommentRef
0.0287 ± 0.0030
2016cVdG, Act. + AMS, Au:632(9) mbWBB16
0.0127 - 0.092 
E(n,av)= 46 - 128 keV
2012cVdG, Act. + AMS, Au:RaK88WBD12
0.0198 ± 0.0037
E(n,aver)= 25.7 keV
0.021 ± 0.0041997bPelletron, TOF, Au:B-VI; Recalcul. including contrib. of p-wave Men99 and of resonance at 153 keV RID90SOK97
0.020 ± 0.009
40 keV
0.015 ± 0.0071990rPelletron, TOF, Au:B-VI; Recalcul. including contrib. of reson.(153keV); only s-wave DRCRID90
0.0267
1999c,tCalcul. incl. data of RID90HHJ99
0.23 ± 0.10
1981cCalcul. from data of MDH81BVW92
0.0140
2014tJEFF 3.2, uses TALYS calculationsjeff32
0.12 ± 0.04
1971aLinac, TOF, 127I:BNL-325,2nd(1966)AlM71


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)
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
tTheoretical value
aCalculated from resonance parameters with the formula from Ref. 45
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
0.0083 ± 0.0011
0.0081 ± 0.0010
0.0082 ± 0.0014
0.0096 ± 0.0017
0.0138 ± 0.0023
0.0206 ± 0.0027
0.0287 ± 0.0030
0.0437 ± 0.0049
0.0540 ± 0.0061
0.0601 ± 0.0069
0.0650 ± 0.0079
0.0657 ± 0.0084
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
5.09
6.29
7.12
10.20
16.94
28.27
43.14
75.85
104.79
127.76
159.55
180.30

MACS:
Reference: WBB16
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: 2016

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
13O
8.58 ms
β+
14O
1.18 m
β+
15O
2.04 m
β+
16O
99.762
0.038 mb
17O
0.038
12N
11.00 ms
β+
13N
9.96 m
β+
14N
99.634
0.041 mb
15N
0.366
0.0058 mb
16N
7.13 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-
15C
2.45 s
β-
10B
19.8
11B
80.2
12B
20.20 ms
β-
13B
17.30 ms
β-
14B
12.50 ms
β-
9Be
100
0.0104 mb
10Be
1.51 Ma
β-
11Be
13.81 s
β-
12Be
21.50 ms
β-
13Be
0.00 ms
N
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Style: (S, M, L, XL or Alberto)


Isotope: Carbon