Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Calcium (Z=20)
  40Ca   41Ca   42Ca   43Ca   44Ca   45Ca   46Ca   47Ca   48Ca
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
48Ca 49Ca




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.00.79 ± 0.06--
0.00.87 ± 0.09--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is weighted average of MOB97 and BCS96 (normalized by 632/586= 1.0785). Uncertainty is taken from MOB97. MACS vs. kT energy dependence taken from TENDL-2015.
Last review: May 2016
List of all available values
originalrenorm.yeartypeCommentRef
0.623 ± 0.047
kT= 52 keV
0.82 ± 0.061997rVdG, Act., 1/v(kT), Au:KNA87,MHW75MOB97
0.751 ± 0.068
kT= 25 keV
0.744 ± 0.0671996rVdG, Act., 1/v(kT), Au:RaK88 corrected by 632/586= 1.0785, Mac82eBCS96
0.813 ± 0.074
1996cNorm. direct capture calculation; 1/v(kT): Reaction rate= 1.19e5 cm3/ mol/sBCS96
1.03 ± 0.09
kT= 25 keV
1.07 ± 0.091985rVdG, Act., 1/v(kT), Au:corrected by 683/657= 1.04KWM85
1.05 ± 0.13
1987cLinac, TOF, 6Li, Au:Sat.CHM87
1.03 ± 0.13
1984cLinac, TOF, 6Li, Au:Sat.CHH84
0.86
2015eTENDL-2015 using the TALYS codetendl15
0.108
2014eJEFF-3.2jeff32
0.108
2011eENDF/B-VII.1endfb71
0.108
2011eJENDL-4.0jendl40
1.05
2005tMOST 2005Gor05
1.12
2002tMOST 2002Gor02
0.66
2000tNON-SMOKERRaT99
0.655
kT= 52 keV
0.8621997tDirect capture calculationMOB97
1.039
1996tDirect capture calculationKBO96
1.1
1978tWFH78


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:
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
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
2.89
-
2.42
1.85
1.39
1.06
0.79 ± 0.06
0.55
0.39
0.30
0.19
0.14
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
1.73
-
2.04
1.91
1.66
1.42
1.16
0.93
0.74
0.62
0.45
0.37

MACS:
Reference: MOB97,BCS96,tendl15
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: 1997,2016

X-factor:
Reference: Rau12
Year: 2012

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 105 cm3/mole/s, including SEF
Chart of nuclei
up
left
48Ti
73.72
31.8 mb
49Ti
5.41
22.1 mb
50Ti
5.18
3.6 mb
51Ti
5.76 m
β-
52Ti
1.70 m
β-
47Sc
3.35 d
β-
48Sc
1.82 d
β-
49Sc
57.20 m
β-
50Sc
1.71 m
β-
51Sc
12.40 s
β-
46Ca
0.004
5.3 mb
47Ca
4.54 d
β-
48Ca
0.187
0.87 mb
49Ca
8.72 m
β-
50Ca
13.90 s
β-
45K
17.30 m
β-
46K
1.75 m
β-
47K
17.50 s
β-
48K
6.80 s
β-
49K
1.26 s
β-
44Ar
11.87 m
β-
45Ar
21.48 s
β-
46Ar
8.40 s
β-
47Ar
1.23 s
β-
48Ar
480.00 ms
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Calcium