Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Germanium (Z=32)
  70Ge   72Ge   73Ge   74Ge   76Ge
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
74Ge 75Ge




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.337.6 ± 3.9--
0.053 ± 7--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: July 9th, 2009
List of all available values
originalrenorm.yeartypeCommentRef
37.6 ± 3.9
2009cVdG, Act., Au:RaK88MDD09
54 ± 7
531986cVdG, Act., 1/v(kT), Au:657mb(25keV)WBK86b
17 ± 12
141979cF.N.B., Act., 1/v(E), 127I:832mb(25keV)AJB79
35 ± 20
1971eAGM71
45.52
2006eendfb7
15.60
2004ejeff31
14.17
2002ejendl33
39
2000tRaT99
25
1981tHar81
24
1978tWFH78
71.6
2002tMOST 2002Gor02
57.5
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
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
106
70.2
55.0
46.9
41.1
37.6 ± 3.9
32.6
29.0
26.3
23.4
22.0
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
6.31
5.91
5.67
5.58
5.47
5.48
5.49
5.46
5.42
5.58
5.87

MACS:
Reference: MDD09,RaT99,WBK86b
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: 2009

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

Rate:
Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
74Se
0.89
267 mb
75Se
119.78 d
β+
76Se
9.37
164 mb
77Se
7.63
418 mb
78Se
23.77
109 mb
73As
80.30 d
β+
74As
17.77 d
β+
75As
100
362 mb
76As
1.09 d
β-
77As
1.62 d
β-
72Ge
27.31
73 mb
73Ge
7.76
243 mb
74Ge
36.73
37.6 mb
75Ge
1.38 h
β-
76Ge
7.83
21.5 mb
71Ga
39.892
123 mb
72Ga
14.10 h
β-
73Ga
4.86 h
β-
74Ga
8.12 m
β-
75Ga
2.10 m
β-
70Zn
0.62
21.5 mb
71Zn
2.45 m
β-
72Zn
1.94 d
β-
73Zn
23.50 s
β-
74Zn
1.59 m
β-
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Isotope: Germanium
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