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
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
84Sr 85Sr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.2300 ± 17-190 ± 10
0.0368 ± 126*-

(Version 0.0 corresponds to Bao et al.)
Comment
Previous MACS vs. kT table multiplied by 0.815.
Last review: January 30th, 2006
List of all available values
originalrenorm.yeartypeCommentRef
300 ± 17
2006cVdG, Act., Au:RaK88DHK06a
330
1971sAGM71
319.2
2006eendfb7
233.8
2004ejeff31
398
2000tRaT99
144 ± 47
1988tZZC88
317
1981tHar81
285
1976tHWF76
74.2
2002tMOST 2002Gor02
244
2005tMOST 2005Gor05
Partial cross section to 85mSr:
190 ± 10
2006cVdG, Act., Au:RaK88DHK06a


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
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
 721 
 507 
 421 
 364 
 326 
300 ± 17
 263 
 233 
 210 
 173 
 151 
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
4.29
4.27
4.34
4.33
4.34
4.37
4.42
4.38
4.33
4.12
4.02

MACS:
Reference: DHK06,RaT99
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: 2000,2006

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
84Zr
25.90 m
β+
85Zr
7.86 m
β+
86Zr
16.50 h
β+
87Zr
1.68 h
β+
88Zr
83.40 d
β+
83Y
7.08 m
β+
84Y
4.60 s
β+
85Y
2.68 h
β+
86Y
14.74 h
β+
87Y
3.33 d
β+
82Sr
25.55 d
β+
83Sr
1.35 d
β+
84Sr
0.56
368 mb
85Sr
64.84 d
β+
86Sr
9.86
64 mb
81Rb
4.57 h
β+
82Rb
1.27 m
β+
83Rb
86.20 d
β+
84Rb
33.10 d
β+
85Rb
72.17
234 mb
80Kr
2.28
267 mb
81Kr
229.02 ka
607 mb, β+
82Kr
11.58
90 mb
83Kr
11.49
243 mb
84Kr
57
38 mb
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Isotope: Strontium
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