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)
80Kr 81Kr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0267 ± 14-88.2 ± 3.5

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
257 ± 15
2671986rVdG, TOF, Au:B-VWLK86
310
1988eKWN88
140
1971sAGM71
295.2
2006eendfb7
212.0
2004ejeff31
295.2
2002ejendl33
192
2000tRaT99
242
1986tWLK86
156
1981tHar81
150
1978tWFH78
206
2002tMOST 2002Gor02
223
2005tMOST 2005Gor05
Partial cross section to 81mKr:
88.2 ± 3.5
1991cVdG, Act., 1/v(kT),Au:RaK88Bee91


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
cDirectly quoted from the reference itself
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
935
601
404
338
296
267 ± 14
237
218
202
180
164
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
5.56
5.06
4.16
4.02
3.94
3.89
3.99
4.10
4.16
4.29
4.38

MACS:
Reference: Wal84,WLK86
Procedure: 'e' (The Maxwellian-averaged cross sections (MACS) from kT=5 keV to 100 keV are obtained from experimental data; the relative uncertainties are similar to those quoted for the 30 keV data.)
Year: 1986

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
80Sr
1.77 h
β+
81Sr
22.30 m
β+
82Sr
25.55 d
β+
83Sr
1.35 d
β+
84Sr
0.56%
368 mb
79Rb
22.90 m
β+
80Rb
33.40 s
β+
81Rb
4.57 h
β+
82Rb
1.27 m
β+
83Rb
86.20 d
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+
82Kr
11.58%
90 mb
77Br
2.38 d
β+
78Br
6.46 m
β+
79Br
50.69%
622 mb
80Br
17.68 m
β-
81Br
49.31%
239 mb
76Se
9.37%
164 mb
77Se
7.63%
418 mb
78Se
23.77%
109 mb
79Se
294.99 ka
263 mb, β-
80Se
49.61%
42 mb
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Krypton