Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Krypton (Z=36)
  78Kr   79Kr   80Kr   81Kr   82Kr   83Kr   84Kr   85Kr   86Kr
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
84Kr 85Kr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.033.1 ± 2.5-19.4 ± 0.9
0.038 ± 4-17.8 ± 0.8

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is weighted average from MBB05, TNS03b and WLK86 using 7.5% uncertainty. Uncertainty in MBB05 is only statistical. For the MACS vs. kT table only the latest evaluation from tendl15 was used. Isomeric ratio at kT= 30 keV is IR= 0.586.
Last review: December 2016
List of all available values
originalrenorm.yeartypeCommentRef
33 ± 2
2004cLinac, TOF, 131XeMBB05
32.1 ± 2.4
2003cPelletron, TOF, Au:ENDF/B-VI and MaG67bTNS03b
36.5 ± 4.5
37.2 ± 4.61986rVdG, TOF, Au:B-V norm. by 613 mb/601 mb= 1.02WLK86
57 ± 10
E(n)= 25 keV
451972cSb-Be, Act., 1/v(E), 127I:832mb(25keV)TRK72
31.3
2015eTENDL-2015 using the TALYS codetendl15
31.8
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
26.4
2011eENDF/B-VII.1endfb71
38.7
2011eJENDL-4.0jendl40
34.8
2004eJEFF-3.1jeff31
40.5
2002eJENDL-3.3jendl33
28
1971sAGM71
58.9
2005tMOST 2005Gor05
68.5
2002tMOST 2002Gor02
62.2
2000tNON-SMOKERRaT99
40
1986tWLK86
13
1981tHar81
29
1978tWFH78
Partial cross section to 85mKr:
18.3 ± 0.8
19.7 ± 0.91991cVdG, Act., 1/v(kT), Au:RaK88 norm. by 1.0785Bee91
16.7 ± 1.2
18.8 ± 1.41987cVdG, Act.,1/v(kT), Au:562mb norm. by 1.125KNA87


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
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
170.1
88.4
59.9
46.1
38.2
33.1 ± 2.5
27.2
24.1
22.3
20.6
20.0
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
1.01
-
0.74
0.62
0.55
0.51
0.48
0.46
0.45
0.46
0.49
0.53

MACS:
Reference: MBB05,TNS03b,WLK86,tendl15
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: 2016

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
84Sr
0.56
368 mb
85Sr
64.84 d
β+
86Sr
9.86
64 mb
87Sr
7
92 mb
88Sr
82.58
6.2 mb
83Rb
86.20 d
β+
84Rb
33.10 d
β+
85Rb
72.17
234 mb
86Rb
18.64 d
202 mb, β-
87Rb
49.69x109 y
15.7 mb, β-
82Kr
11.58
90 mb
83Kr
11.49
243 mb
84Kr
57
38 mb
85Kr
10.72 a
55 mb, β-
86Kr
17.3
3.4 mb
81Br
49.31
239 mb
82Br
1.47 d
β-
83Br
2.40 h
β-
84Br
31.80 m
β-
85Br
2.90 m
β-
80Se
49.61
42 mb
81Se
18.45 m
β-
82Se
8.73
9 mb
83Se
22.30 m
β-
84Se
3.10 m
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Krypton