Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Zinc (Z=30)
  64Zn   65Zn   66Zn   67Zn   68Zn   69Zn   70Zn
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
70Zn 71Zn




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.011.8 ± 0.84.5 ± 0.77.3 ± 0.4
0.021.5 ± 2.0* - -

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is from only available measurement (RDH12), but recalculated with energy dependence of recent evaluations (endfb71/jendl40). Isomeric branching ratio at 30 keV = 0.619 RDH12. Both values have been renormalized by f= 1.0785 (632 mb/586 mb) due to corrected Gold cross section from RaK88 for activations.
Last review: June 2016
List of all available values
originalrenorm.yeartypeCommentRef
11.7 ± 0.8
kT= 25 keV
11.8 ± 0.82012,2014rVdG, Act., Au:RaK88 corrected by 632/586= 1.0785; en. dep. from endfb71RDH12
20.4
2015eTENDL-2015 using the TALYS codetendl15
11.7
2011eENDF/B-VII.1endfb71
11.7
2011eJENDL-4.0jendl40
16
1971sAGM71
10.1
2005tMOST 2005Gor05
22.0
2002tMOST 2002Gor02
16.7
2000tNON-SMOKERRaT99
3.2
1981tHar81
11
1978tWFH78
Partial cross section to 71gZn:
4.18 ± 0.67
25 keV
4.49 ± 0.722012rVdG, Act., Au:RaK88 corrected by 632/586= 1.0785; en. dep. from endfb71; assuming same branching ratio as at 25 keVRDH12
Partial cross section to 71mZn:
6.79 ± 0.34
25 keV
7.29 ± 0.372012rVdG, Act., Au:RaK88 corrected by 632/586= 1.0785; en. dep. from endfb71; assuming same branching ratio as at 25 keVRDH12


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:
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
eEvaluated value taken directly from the reference
sSemiempirical estimates given in the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
24.4
-
24.6
19.5
15.9
13.5
11.8 ± 0.8
9.7
8.6
7.9
7.0
6.5
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
1.45
-
2.07
2.01
1.89
1.80
1.72
1.63
1.62
1.63
1.67
1.73

MACS:
Reference: RDH12, 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: 2015

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF
Chart of nuclei
up
left
70Ge
20.37
88 mb
71Ge
11.43 d
β+
72Ge
27.31
73 mb
73Ge
7.76
243 mb
74Ge
36.73
37.6 mb
69Ga
60.108
139 mb
70Ga
21.14 m
β-
71Ga
39.892
123 mb
72Ga
14.10 h
β-
73Ga
4.86 h
β-
68Zn
18.75
19.2 mb
69Zn
56.40 m
β-
70Zn
0.62
21.5 mb
71Zn
2.45 m
β-
72Zn
1.94 d
β-
67Cu
2.58 d
β-
68Cu
31.10 s
β-
69Cu
2.85 m
β-
70Cu
44.50 s
β-
71Cu
19.50 s
β-
66Ni
2.27 d
β-
67Ni
21.00 s
β-
68Ni
29.00 s
β-
69Ni
11.40 s
β-
70Ni
6.00 s
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Zinc