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)
85Kr 86Kr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.073 ± 34--
0.055 ± 45*--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is calculated from data of Fig. 4 in RTR13 from Kr-86(gamma,n). Note that the asymmetric uncertainty was converted into a symmetric one for the recommended value.
Last review: December 2016
List of all available values
originalrenorm.yeartypeCommentRef
83 +23 -38
kT= 25 keV
73 +21 -34 2013c+tPhotoact. with monoenergetic photon beam; from Kr-86(gamma,n); calc. with TALYS-1.43 (talys143, talys143b)RTR13
55.2
2015tTENDL-2015 using the TALYS codetendl15
145.5
2014tJEFF-3.2 using calculations from TENDL-2012jeff32
122.6
2011tENDF/B-VII.1endfb71
197.5
2011tJENDL-4.0; only average xsjendl40
44.6
2004tJEFF-3.1jeff31
68.8
2002tJENDL-3.3jendl33
51.3
2005tMOST 2005Gor05
52.3
2002tMOST 2002Gor02
122.5
2000tNON-SMOKERRaT99
67 ± 17
1986tWLK86
25
1981tHar81
150
1978tWFH78


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
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
235 ± 100
183 ± 80
154 ± 69
118 ± 54
97 ± 45
83 ± 39
73 ± 34
60 ± 28
52 ± 24
46 ± 22
39 ± 18
34 ± 16
Xfactor1.001.001.001.001.001.001.001.001.001.001.000.99
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
1.40
1.38
1.30
1.22
1.15
1.10
1.06
1.01
0.98
0.95
0.93
0.90

MACS:
Reference: RTR13,talys143,talys143b
Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.)
Year: 2013

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 107 cm3/mole/s, including SEF
Chart of nuclei
up
left
85Sr
64.84 d
β+
86Sr
9.86
64 mb
87Sr
7
92 mb
88Sr
82.58
6.2 mb
89Sr
50.57 d
19 mb, β-
84Rb
33.10 d
β+
85Rb
72.17
234 mb
86Rb
18.64 d
202 mb, β-
87Rb
49.69x109 y
15.7 mb, β-
88Rb
17.77 m
β-
83Kr
11.49
243 mb
84Kr
57
38 mb
85Kr
10.72 a
55 mb, β-
86Kr
17.3
3.4 mb
87Kr
1.27 h
β-
82Br
1.47 d
β-
83Br
2.40 h
β-
84Br
31.80 m
β-
85Br
2.90 m
β-
86Br
55.01 s
β-
81Se
18.45 m
β-
82Se
8.73
9 mb
83Se
22.30 m
β-
84Se
3.10 m
β-
85Se
31.70 s
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Krypton