Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Germanium (Z=32)
  70Ge   71Ge   72Ge   73Ge   74Ge   75Ge   76Ge
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
75Ge 76Ge




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0179 ± 45*--

(Version 0.0 corresponds to Bao et al.)
Comment
New dataset. No exp. data available. New rec. value is from tendl15. Assuming 25% uncertainty.
Last review: June 2016
List of all available values
originalrenorm.yeartypeCommentRef
179
2015tTENDL-2015 using the TALYS codetendl15
102
2000tNON-SMOKERRaT99


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:
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
495
-
338
271
230
201
179 ± 45
147
125
108
86
70
SEF1.001.001.001.001.001.000.990.960.920.870.790.74
Rate
2.95
-
2.85
2.79
2.74
2.67
2.59
2.39
2.17
1.95
1.63
1.38

MACS:
Reference: tendl15
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: 2016

X-factor:

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

Rate:
Reaction rate NA<σv> given in 107 cm3/mole/s, including SEF
Chart of nuclei
up
left
75Se
119.78 d
β+
76Se
9.37
164 mb
77Se
7.63
418 mb
78Se
23.77
109 mb
79Se
294.99 ka
263 mb, β-
74As
17.77 d
β+
75As
100
362 mb
76As
1.09 d
β-
77As
1.62 d
β-
78As
1.51 h
β-
73Ge
7.76
243 mb
74Ge
36.73
37.6 mb
75Ge
1.38 h
β-
76Ge
7.83
21.5 mb
77Ge
11.30 h
β-
72Ga
14.10 h
β-
73Ga
4.86 h
β-
74Ga
8.12 m
β-
75Ga
2.10 m
β-
76Ga
32.60 s
β-
71Zn
2.45 m
β-
72Zn
1.94 d
β-
73Zn
23.50 s
β-
74Zn
1.59 m
β-
75Zn
10.20 s
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Germanium