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
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
76Ge 77Ge




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.321.5 ± 1.8--
0.033 ± 15*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: July 9th, 2009
List of all available values
originalrenorm.yeartypeCommentRef
21.5 ± 1.8
2009cVdG, Act., Au:RaK88MDD09
53 ± 10
1971eAGM71
17.05
2006eendfb7
10.15
2004ejeff31
8.43
2002ejendl33
23
2000tRaT99
33
1981tHar81
21
1978tWFH78
24.5
2002tMOST 2002Gor02
22.5
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
58.0
39.8
31.3
26.7
23.5
21.5 ± 1.8
18.2
16.3
15.0
13.0
12.3
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
3.45
3.35
3.23
3.18
3.13
3.13
3.06
3.07
3.09
3.10
3.27

MACS:
Reference: MDD09,RaT99
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
76Se
9.37
164 mb
77Se
7.63
418 mb
78Se
23.77
109 mb
79Se
294.99 ka
263 mb, β-
80Se
49.61
42 mb
75As
100
362 mb
76As
1.09 d
β-
77As
1.62 d
β-
78As
1.51 h
β-
79As
9.01 m
β-
74Ge
36.73
37.6 mb
75Ge
1.38 h
β-
76Ge
7.83
21.5 mb
77Ge
11.30 h
β-
78Ge
1.47 h
β-
73Ga
4.86 h
β-
74Ga
8.12 m
β-
75Ga
2.10 m
β-
76Ga
32.60 s
β-
77Ga
13.20 s
β-
72Zn
1.94 d
β-
73Zn
23.50 s
β-
74Zn
1.59 m
β-
75Zn
10.20 s
β-
76Zn
5.70 s
β-
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Isotope: Germanium
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