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)
186Os 187Os




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.3410 ± 17--
0.0422 ± 16--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: May 27th, 2008
List of all available values
originalrenorm.yeartypeCommentRef
410 ± 17
2008cTOF, Pb Spall., AuMMo07
418 ± 16
1982cLinac, TOF, 6Li, Au:Sat.WMH80,WiM82
438 ± 30
1981cLinac, TOF, 6Li:B-IV, 165Ho:Sat.BrB81
330
1971sAGM71
634
2000tRaT99
421
1981tHar81
734
1976tHWF76
1430
2002tMOST 2002Gor02
663
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
1106 ± 44
788 ± 32
683 ± 28
544 ± 23
476 ± 20
437 ± 18
410 ± 17
374 ± 16
347 ± 14
325 ± 13
292 ± 12
268 ± 11
SEF1.001.01.001.001.011.021.041.091.141.181.261.32
Rate
6.56
5.91
5.73
5.59
5.68
5.90
6.17
6.82
7.41
7.90
8.70
9.37

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 107 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
186Pt
2.08 h
β+
187Pt
2.35 h
β+
188Pt
10.20 d
β+
189Pt
10.87 h
β+
190Pt
650.00x109 y
508 mb, α
185Ir
14.40 h
β+
186Ir
16.64 h
β+
187Ir
10.50 h
β+
188Ir
1.73 d
β+
189Ir
13.20 d
β+
184Os
0.02
590 mb
185Os
93.60 d
β+
186Os
1.59
422 mb
187Os
1.6
896 mb
188Os
13.29
399 mb
183Re
70.00 d
β+
184Re
38.00 d
β+
185Re
37.4
1535 mb
186Re
3.72 d
1550 mb, β-
187Re
41.20x109 y
1160 mb, β-
182W
26.5
274 mb
183W
14.31
515 mb
184W
30.64
223 mb
185W
75.10 d
703 mb, β-
186W
28.43
235 mb
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Isotope: Osmium
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