Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Magnesium (Z=12)
  24Mg   25Mg   26Mg
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
26Mg 27Mg




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.00.14 ± 0.01--
0.00.126 ± 0.009--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is from CM12 which is in good agreement with the renormalized value from MBO98a. However, CM12 claims that due to some uncertainty in the sample mass the values might be underestimated by about 20%. Remeasurement needed for clarification.
Last review: December 2014
List of all available values
originalrenorm.yeartypeCommentRef
0.14 ± 0.01
2012cPb Spall., TOF CM12
0.124 ± 0.008
E(n,av)= 25 keV
0.136 ± 0.0081998,2014cVdG, Act., Au:RaK88 corrected by 632/586= 1.0785; other energies: MHW75MBO98a
0.1137 ± 0.0080
E(n,av)= 52 keV
0.1161999cVdG, Act., Au:431mb(52keV) Mac82eMBO98b
0.084 ± 0.005
1976rLinac, TOF, 6Li, Au:Sat., k=0.9535 Recalcul. including data of MDH81WMH76
0.086 ± 0.005
1976c,1Linac, TOF, 6Li, Au:Sat., k=0.9535WMH76
12
1971eAGM71
0.087 ± 0.016
2011eENDF/B-VII.1 plus covariancesendfb71
0.087
2011eJENDL-4.0jendl40
0.087
2004eJEFF-3.1jeff31
1.67
2000tNON-SMOKERRaT99
8.32
2002tMOST 2002Gor02
7.93
2005tMOST 2005Gor05


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
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
1Including k from Ref. MaW81, where k is a correction factor which has been applied to the originally reported cross section
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
0.087 ± 0.002
0.070 ± 0.001
0.077 ± 0.001
0.086 ± 0.003
0.109 ± 0.005
0.12 ± 0.01
0.14 ± 0.01
0.18 ± 0.01
0.23 ± 0.02
0.28 ± 0.02
0.37 ± 0.04
0.43 ± 0.05
Xfactor1.001.001.001.001.001.001.001.001.001.001.001.00
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
5.24
5.34
6.56
8.98
13.14
16.17
20.66
30.68
43.83
58.45
89.18
115.88

MACS:
Reference: CM12
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: 2012

X-factor:
Reference: Rau12
Year: 2012

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 103 cm3/mole/s, including SEF
Chart of nuclei
up
left
26Si
2.23 s
β+
27Si
4.16 s
β+
28Si
92.23
2.9 mb
29Si
4.683
7.9 mb
30Si
3.087
6.5 mb
25Al
7.18 s
β+
26Al
717.12 ka
3.7 mb, β+
27Al
100
3.74 mb
28Al
2.24 m
β-
29Al
6.56 m
β-
24Mg
78.99
3.3 mb
25Mg
10
6.4 mb
26Mg
11.01
0.126 mb
27Mg
9.46 m
β-
28Mg
20.91 h
β-
23Na
100
2.1 mb
24Na
14.95 h
β-
25Na
59.01 s
β-
26Na
1.08 s
β-
27Na
301.00 ms
β-
22Ne
9.25
0.059 mb
23Ne
37.24 s
β-
24Ne
3.38 m
β-
25Ne
602.00 ms
β-
26Ne
192.00 ms
β-
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Isotope: Magnesium