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)
53Cr 54Cr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.058 ± 10--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
58 ± 10
1977c,2Linac, TOF, 6Li, Au+Ti:Sat., k=1.0737KAM77b
61 ± 24
1975cVdG, TOF, Au:596mb Kom69BSE74,BeS75
40 ± 5
1971eAGM71
31.42
2006eendfb7
31.42
2004ejeff31
31.75
2002ejendl33
26
2000tRaT99
24
1978tWFH78
39.7
2002tMOST 2002Gor02
35.1
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
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
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
350
187
121
88
70
58 ± 10
45
36
31
27
19
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
2.09
1.58
1.25
1.05
0.93
0.85
0.76
0.68
0.64
0.64
0.51

MACS:
Reference: KAM77b
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: 1977

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

Rate:
Reaction rate NA<σv> given in 107 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
53Fe
8.51 m
β+
54Fe
5.845%
27.6 mb
55Fe
2.74 a
75 mb, β+
56Fe
91.754%
11.7 mb
57Fe
2.119%
40 mb
52Mn
5.59 d
β+
53Mn
3.74 Ma
β+
54Mn
312.15 d
β+
55Mn
100%
39.6 mb
56Mn
2.58 h
β-
51Cr
27.70 d
87 mb, β+
52Cr
83.789%
8.8 mb
53Cr
9.501%
58 mb
54Cr
2.365%
6.7 mb
55Cr
3.50 m
β-
50V
0.25%
50 mb
51V
99.75%
38 mb
52V
3.74 m
β-
53V
1.60 m
β-
54V
49.80 s
β-
49Ti
5.41%
22.1 mb
50Ti
5.18%
3.6 mb
51Ti
5.76 m
β-
52Ti
1.70 m
β-
53Ti
32.70 s
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Chromium