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)
70Ge 71Ge




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.089.1 ± 5.0--
0.088 ± 5--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is from recent evaluations (endfb71, jendl40) assuming 5.6% uncertainty as in WaB85. Note the discrepancy to the two more recent TENDL predictions.
Last review: June 2016
List of all available values
originalrenorm.yeartypeCommentRef
92 ± 5
941985cVdG, TOF, Au:B-V renorm. by 613 mb/601 mb= 1.02 WaB85
84
1971sAGM71
56.6
2015eTENDL-2015 using the TALYS codetendl15
56.6
2014eJEFF-3.2 using TENDL-2012jeff32
89.1
2011eENDF/B-VII.1endfb71
89.4
2011eJENDL-4.0jendl40
85.3
2004eJEFF-3.1jeff31
86.9
2002eJENDL-3.3jendl33
114
2005tMOST 2005Gor05
138
2002tMOST 2002Gor02
107
2000tNON-SMOKERRaT99
82
1981tHar81
67
1978tWFH78


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
sSemiempirical estimates given in the reference
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
207.3
-
154.8
127.1
109.8
97.8
89.1 ± 5.0
77.1
69.3
63.7
56.2
51.4
Xfactor1.001.001.001.001.001.001.001.001.001.001.001.00
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
1.23
-
1.30
1.31
1.31
1.30
1.30
1.30
1.31
1.31
1.34
1.37

MACS:
Reference: endfb71, jendl40
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: 2013

X-factor:
Reference: Rau12
Year: 2012

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
70Se
41.10 m
β+
71Se
4.74 m
β+
72Se
8.40 d
β+
73Se
7.15 h
β+
74Se
0.89
267 mb
69As
15.20 m
β+
70As
52.60 m
β+
71As
2.72 d
β+
72As
1.08 d
β+
73As
80.30 d
β+
68Ge
270.95 d
β+
69Ge
1.63 d
β+
70Ge
20.37
88 mb
71Ge
11.43 d
β+
72Ge
27.31
73 mb
67Ga
3.26 d
β+
68Ga
1.13 h
β+
69Ga
60.108
139 mb
70Ga
21.14 m
β-
71Ga
39.892
123 mb
66Zn
27.9
35 mb
67Zn
4.1
153 mb
68Zn
18.75
19.2 mb
69Zn
56.40 m
β-
70Zn
0.62
21.5 mb
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Isotope: Germanium