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
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
81Kr 82Kr




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0607 ± 105*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
538
2000tRaT99
682
1986tWLK86
994
1981tHar81
1100
1978tWFH78
847
2002tMOST 2002Gor02
788
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:
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1389
994
844
743
667
607 ± 105
518
455
408
342
298
SEF1.001.000.990.970.960.950.940.930.920.920.92
Rate
8.26
8.34
8.58
8.60
8.51
8.40
8.15
7.94
7.77
7.52
7.33

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
81Sr
22.30 m
β+
82Sr
25.55 d
β+
83Sr
1.35 d
β+
84Sr
0.56%
368 mb
85Sr
64.84 d
β+
80Rb
33.40 s
β+
81Rb
4.57 h
β+
82Rb
1.27 m
β+
83Rb
86.20 d
β+
84Rb
33.10 d
β+
79Kr
1.46 d
959 mb, β+
80Kr
2.28%
267 mb
81Kr
229.02 ka
607 mb, β+
82Kr
11.58%
90 mb
83Kr
11.49%
243 mb
78Br
6.46 m
β+
79Br
50.69%
622 mb
80Br
17.68 m
β-
81Br
49.31%
239 mb
82Br
1.47 d
β-
77Se
7.63%
418 mb
78Se
23.77%
109 mb
79Se
294.99 ka
263 mb, β-
80Se
49.61%
42 mb
81Se
18.45 m
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Krypton