Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Contact]
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]
0.0959 ± 162*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
699
2000tRaT99
857
1986tWBK86b
825
2002tMOST 2002Gor02
769
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
1713
1387
1231
1118
1030
959 ± 162
846
759
687
576
492
SEF1.001.001.001.001.011.021.041.071.091.121.14
Rate
1.02
1.17
1.27
1.33
1.38
1.42
1.49
1.53
1.54
1.53
1.49

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 108 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
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: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Krypton