Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Strontium (Z=38)
  84Sr   86Sr   87Sr   88Sr   89Sr   90Sr
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
86Sr 87Sr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.060.0 ± 4.5-51.8 ± 1.1
0.064 ± 3--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is average from recent evaluated libraries (tendl15, jeff32, endfb71,jendl40). Uncertainty is standard deviation between evaluations . Isomeric ratio at kT= 25 keV is IR=0.863.
Last review: December 2016
List of all available values
originalrenorm.yeartypeCommentRef
70 ± 4
1991cLinac, TOF,6Li, Au:YoA85BBB91
63.9 ± 2.6
1989cLinac, TOF, 6Li, Au:Sat.Mac89
74 ± 5
75.5 ± 5.11985cVdG, TOF, Au:endfb52 norm. by 613/601= 1.02WaB85
70 ± 8
1982cLinac, TOF, 6Li+235U, Au:Sat.HAM82
109 ± 30
E(n)= 24 (5) keV
1973cSb-Be, Act., 1/v(E), 127I: 832 mb (24keV)MSR73
75 ± 15
1967cVdG, TOF, 181Ta: 762 mbMaG67b
57.2
2015eTENDL-2015 using the TALYS codetendl15
55.8
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
61.6
2011eENDF/B-VII.1endfb71
65.8
2011eJENDL-4.0jendl40
57.2
2004eJEFF-3.1jeff31
68.4
2002eJENDL-3.3jendl33
74 ± 7
1971eAGM71
51.0
2005tMOST 2005Gor05
56.9
2002tMOST 2002Gor02
209
2000tNON-SMOKERRaT99
57
1981tHar81
87
1976tHWF76
Partial cross section to 87mSr:
52.9 ± 1.1
kT= 25 keV
51.8 ± 1.11990cVdG, Act., 1/v(kT), Au:RaK88 norm. by 632/586=1.0785KZB90
122 ± 15
E(n)= 24 (5) keV
1973cSb-Be, Act., 1/v(E), 127I:832mb(24keV); partial xs to isomerMSR73


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
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
225.4 ± 14.0
-
124.3 ± 9.8
91.5 ± 7.0
75.6 ± 5.7
66.2 ± 5.0
60.0 ± 4.5
52.2 ± 3.7
47.4 ± 3.3
44.2 ± 3.0
40.2 ± 2.8
37.9 ± 2.8
Xfactor1.001.001.001.001.001.001.001.001.001.001.001.00
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
1.34
-
1.05
0.94
0.90
0.88
0.87
0.88
0.89
0.91
0.96
1.01

MACS:
Reference: tendl15, jeff32, endfb71,jendl40
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: 2016

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
86Zr
16.50 h
β+
87Zr
1.68 h
β+
88Zr
83.40 d
β+
89Zr
3.27 d
β+
90Zr
51.45
19.4 mb
85Y
2.68 h
β+
86Y
14.74 h
β+
87Y
3.33 d
β+
88Y
106.62 d
β+
89Y
100
19 mb
84Sr
0.56
368 mb
85Sr
64.84 d
β+
86Sr
9.86
64 mb
87Sr
7
92 mb
88Sr
82.58
6.2 mb
83Rb
86.20 d
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-
82Kr
11.58
90 mb
83Kr
11.49
243 mb
84Kr
57
38 mb
85Kr
10.72 a
55 mb, β-
86Kr
17.3
3.4 mb
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Style: (S, M, L, XL or Alberto)


Isotope: Strontium