Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Osmium (Z=76)
  184Os   186Os   187Os   188Os   189Os   190Os   191Os   192Os
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
187Os 188Os




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.3966 ± 31--
0.0896 ± 30--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: June 10th, 2008
List of all available values
originalrenorm.yeartypeCommentRef
966 ± 31
2008cTOF, Pb Spall., AuMMo07
922 ± 46
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
874 ± 28
1982cLinac, TOF, 6Li, Au:Sat.WMH80,WiM82
919 ± 43
1981cLinac, TOF, 6Li:B-IV, 165Ho:Sat.BrB81
900
1971sAGM71
810
2000tRaT99
909
1981tHar81
1230
1976tHWF76
1086
2002tMOST 2002Gor02
1338
2005tMOST 2005Gor05


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
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
3746 ± 117
2582 ± 81
2167 ± 69
1589 ± 51
1286 ± 41
1097 ± 36
966 ± 31
793 ± 26
683 ± 22
605 ± 20
501 ± 17
435 ± 14
SEF1.021.01.071.121.151.171.191.231.261.281.331.38
Rate
2.26
1.94
1.95
1.83
1.75
1.71
1.67
1.63
1.61
1.59
1.58
1.59

MACS:
Reference: MMo07
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: 2007

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

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
187Pt
2.35 h
β+
188Pt
10.20 d
β+
189Pt
10.87 h
β+
190Pt
650.00x109 y
508 mb, α
191Pt
2.86 d
β+
186Ir
16.64 h
β+
187Ir
10.50 h
β+
188Ir
1.73 d
β+
189Ir
13.20 d
β+
190Ir
11.78 d
β+
185Os
93.60 d
β+
186Os
1.59
422 mb
187Os
1.6
896 mb
188Os
13.29
399 mb
189Os
16.21
1168 mb
184Re
38.00 d
β+
185Re
37.4
1535 mb
186Re
3.72 d
1550 mb, β-
187Re
41.20x109 y
1160 mb, β-
188Re
17.00 h
β-
183W
14.31
515 mb
184W
30.64
223 mb
185W
75.10 d
703 mb, β-
186W
28.43
235 mb
187W
23.72 h
β-
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Isotope: Osmium
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