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)
73Ge 74Ge




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0243 ± 47*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
270
1971sAGM71
209.8
2006eendfb7
205.2
2004ejeff31
191.4
2002ejendl33
181
2000tRaT99
341
1981tHar81
240
1978tWFH78
263
2002tMOST 2002Gor02
399
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:
sSemiempirical estimates given in the reference
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
772
497
385
319
275
243 ± 47
198
169
148
119
101
SEF1.001.011.011.000.990.980.950.930.920.890.86
Rate
4.62
4.23
4.01
3.81
3.62
3.46
3.18
2.97
2.80
2.53
2.33

MACS:
Reference:
Procedure: 't' (The MACS from kT=5 keV to 100 keV are obtained from theoretical calculations with corresponding uncertainties between 25 and 50% in most cases.)
Year: 2000

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
73Se
7.15 h
β+
74Se
0.89%
267 mb
75Se
119.78 d
β+
76Se
9.37%
164 mb
77Se
7.63%
418 mb
72As
1.08 d
β+
73As
80.30 d
β+
74As
17.77 d
β+
75As
100%
362 mb
76As
1.09 d
β-
71Ge
11.43 d
β+
72Ge
27.31%
73 mb
73Ge
7.76%
243 mb
74Ge
36.73%
37.6 mb
75Ge
1.38 h
β-
70Ga
21.14 m
β-
71Ga
39.892%
123 mb
72Ga
14.10 h
β-
73Ga
4.86 h
β-
74Ga
8.12 m
β-
69Zn
56.40 m
β-
70Zn
0.62%
21.5 mb
71Zn
2.45 m
β-
72Zn
1.94 d
β-
73Zn
23.50 s
β-
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Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Germanium