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)
78Kr 79Kr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0321 ± 26-92.3 ± 6.2

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
318 ± 26
1991cVdG, Act., 1/v(kT), Au:RaK88Bee91
359 ± 44
3321986rVdG, TOF, Au:B-VWLK86
250
1971sAGM71
381.0
2006eendfb7
296.0
2004ejeff31
381.0
2002ejendl33
343
2000tRaT99
368
1986tWLK86
253
1981tHar81
200
1978tWFH78
341
2002tMOST 2002Gor02
377
2005tMOST 2005Gor05
Partial cross section to 79mKr:
92.3 ± 6.2
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:
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
sSemiempirical estimates given in the reference
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
332
361
374
358
338
321 ± 26
295
275
261
243
232
SEF1.001.001.001.001.001.001.001.001.001.011.02
Rate
1.98
3.04
3.86
4.26
4.50
4.68
4.97
5.18
5.39
5.82
6.28

MACS:
Reference: Wal84,Bee91
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: 1991

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
78Sr
2.50 m
β+
79Sr
2.25 m
β+
80Sr
1.77 h
β+
81Sr
22.30 m
β+
82Sr
25.55 d
β+
77Rb
3.77 m
β+
78Rb
17.66 m
β+
79Rb
22.90 m
β+
80Rb
33.40 s
β+
81Rb
4.57 h
β+
76Kr
14.80 h
β+
77Kr
1.24 h
β+
78Kr
0.35%
321 mb
79Kr
1.46 d
959 mb, β+
80Kr
2.28%
267 mb
75Br
1.61 h
β+
76Br
16.20 h
β+
77Br
2.38 d
β+
78Br
6.46 m
β+
79Br
50.69%
622 mb
74Se
0.89%
267 mb
75Se
119.78 d
β+
76Se
9.37%
164 mb
77Se
7.63%
418 mb
78Se
23.77%
109 mb
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Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Krypton