Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Iron (Z=26)
  54Fe   55Fe   56Fe   57Fe   58Fe   59Fe   60Fe
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
57Fe 58Fe




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.026.8 ± 4.4--
0.040 ± 4--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is reported value from latest nTOF measurement (GG14). Energy dependence for MACS vs. kT table from averaged dependencies of endfb71 and jendl40. Uncertainties for extrapolations from covariances of endfb71. Additional uncertainty for kT=5-15 keV due to different energy dependencies of evaluations.
Note that there is a discrepancy between the most recent nTOF measurement (GG14), the evaluated libraries (endfb71, jendl40 - which use the resonance parameters from AMT79 (s wave) and BSE74 (p wave)), and the measurements from WLK09 and RBC83.
Last review: December 2016
List of all available values
originalrenorm.yeartypeCommentRef
26.8 ± 4.4
2014cPb Spall., TOF; Au:Sat. GG14
44.48 ± 7.56
2009cPelletron, TOF, Au: endfb7WLK09
39.9 ± 4.0
1983rLinac, TOF, 10B, Ag:Sat.RBC83
36.0 ± 2.3
1979c,2Linac, TOF, 6Li, Au:Sat., k=1.0360AMT79
28 ± 6
28.8 ± 6.21975,2016cVdG, TOF, Au:596mb Kom69; renorm. by 613/598= 1.028BSE74,BeS75
60.6
2015eTENDL-2015 using the TALYS codetendl15
30.3
2014eJEFF-3.2jeff32
28.5 ± 4.6
2011eENDF/B-VII.1 incl. covariance dataendfb71
30.3
2011eJENDL-4.0jendl40
30.3
2004eJEFF-3.1jeff31
30 ± 5
1971eAGM71
49.6
2005tMOST 2005Gor05
56.5
2002tMOST 2002Gor02
30.3
2000tNON-SMOKERRaT99
27
1981tHar81
21
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:
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
2Including k from Ref. ABM82, 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
111 ± 30
-
70.7 ± 17.0
51.1 ± 9.7
39.7 ± 5.8
32.1 ± 4.9
26.8 ± 4.4
19.9 ± 3.6
15.7 ± 3.1
13.0 ± 2.8
9.6 ± 2.3
7.7 ± 1.9
Xfactor0.900.770.680.550.480.430.390.350.310.290.250.22
SEF1.001.001.001.031.061.091.121.161.191.211.251.27
Rate
6.61
-
5.98
5.44
5.03
4.68
4.38
3.89
3.52
3.25
2.85
2.61

MACS:
Reference: GG14,endfb71,jendl40
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:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF
Chart of nuclei
up
left
57Ni
1.48 d
β+
58Ni
68.077
38.7 mb
59Ni
75.99 ka
87 mb, β+
60Ni
26.223
30 mb
61Ni
1.14
82 mb
56Co
77.23 d
β+
57Co
271.76 d
β+
58Co
70.86 d
β+
59Co
100
38 mb
60Co
5.27 a
β-
55Fe
2.74 a
75 mb, β+
56Fe
91.754
11.7 mb
57Fe
2.119
40 mb
58Fe
0.282
12.1 mb
59Fe
44.50 d
β-
54Mn
312.15 d
β+
55Mn
100
39.6 mb
56Mn
2.58 h
β-
57Mn
1.42 m
β-
58Mn
3.00 s
β-
53Cr
9.501
58 mb
54Cr
2.365
6.7 mb
55Cr
3.50 m
β-
56Cr
5.94 m
β-
57Cr
21.10 s
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Iron