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)
79Kr 80Kr




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0882 ± 221*--
0.0959 ± 162*--

(Version 0.0 corresponds to Bao et al.)
Comment
No direct experimental value available, the rec. value is the theoretical prediction from tendl15 with a 25% uncertainty.
Last review: December 2016
List of all available values
originalrenorm.yeartypeCommentRef
881.6
2015tTENDL-2015 using the TALYS codetendl15
1041
2005tJEFF-3.0Ajeff30A
769
2005tMOST 2005Gor05
825
2002tMOST 2002Gor02
802.8
2000tNON-SMOKERRaT99
857
1986tWBK86b


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
1934
-
1407
1180
1045
952
882 ± 221
779
704
644
551
481
Xfactor1.001.001.001.000.990.950.880.700.530.410.270.19
SEF1.001.001.001.001.001.011.021.041.071.091.121.14
Rate
1.15
-
1.18
1.22
1.25
1.28
1.31
1.37
1.42
1.45
1.47
1.46

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: 2015

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Chart of nuclei
up
left
79Sr
2.25 m
β+
80Sr
1.77 h
β+
81Sr
22.30 m
β+
82Sr
25.55 d
β+
83Sr
1.35 d
β+
78Rb
17.66 m
β+
79Rb
22.90 m
β+
80Rb
33.40 s
β+
81Rb
4.57 h
β+
82Rb
1.27 m
β+
77Kr
1.24 h
β+
78Kr
0.35
321 mb
79Kr
1.46 d
959 mb, β+
80Kr
2.28
267 mb
81Kr
229.02 ka
607 mb, β+
76Br
16.20 h
β+
77Br
2.38 d
β+
78Br
6.46 m
β+
79Br
50.69
622 mb
80Br
17.68 m
β-
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-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Krypton