Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Chromium (Z=24)
  50Cr   51Cr   52Cr   53Cr   54Cr
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
52Cr 53Cr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.09.0 ± 2.1--
0.08.8 ± 2.3--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is weighted average of RSB89, KAM77b and the renormalized value from BSE74,BeS75. Uncertainty of 23%is taken from "best" measurement (KAM77b). MACS vs. kT table deduced with energy dependence of TENDL-2015, normalized by f=0.99.
Last review: May 2016
List of all available values
originalrenorm.yeartypeCommentRef
8.79 ± 2.30
1989rLinac, TOF, 10B,6Li; Ag:Sat.RSB89
9.8 ± 2.3
1977c,2Linac,TOF,6Li, Au+Ti:Sat., k=1.0737KAM77b
8.3 ± 3.0
8.5 ± 3.11975cVdG, TOF, Au:596mb Kom69; renorm. by 613/596= 1.029BSE74,BeS75
9.1
2015eTENDL-2015 using the TALYS codetendl15
8.0
2011eENDF/B-VII.1endfb71
8.0
2011eJENDL-4.0jendl40
8.7
2006eENDF/B-VII.0endfb7
9.0
2004eJEFF-3.1jeff31
8.6
2002eJENDL-3.3jendl33
3.8 ± 1.0
1971eAGM71
21.1
2005tMOST 2005Gor05
22.6
2002tMOST 2002Gor02
16.7
2000tNON-SMOKERRaT99
12
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
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
10.8
-
9.2
9.3
9.2
9.1
9.0 ± 2.1
8.8
8.5
8.3
7.8
7.3
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
6.45
-
7.77
9.62
10.98
12.15
13.16
14.86
16.05
17.16
18.63
19.49

MACS:
Reference: RSB89,KAM77b,BSE74,BeS75,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: 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
52Fe
8.28 h
β+
53Fe
8.51 m
β+
54Fe
5.845
27.6 mb
55Fe
2.74 a
75 mb, β+
56Fe
91.754
11.7 mb
51Mn
46.20 m
β+
52Mn
5.59 d
β+
53Mn
3.74 Ma
β+
54Mn
312.15 d
β+
55Mn
100
39.6 mb
50Cr
4.345
49 mb
51Cr
27.70 d
87 mb, β+
52Cr
83.789
8.8 mb
53Cr
9.501
58 mb
54Cr
2.365
6.7 mb
49V
329.05 d
β+
50V
0.25
50 mb
51V
99.75
38 mb
52V
3.74 m
β-
53V
1.60 m
β-
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-
right
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Style: (S, M, L, XL or Alberto)


Isotope: Chromium