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)
184Os 185Os




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.3590 ± 39--
0.0657 ± 202*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: July 9th, 2009
List of all available values
originalrenorm.yeartypeCommentRef
590 ± 39
2009cVdG, Act., Au:RaK88MDD09c
400
1971sAGM71
789
2000tRaT99
480
1981tHar81
869
1976tHWF76
693
2002tMOST 2002Gor02
705
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
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1564
1021
816
708
639
590 ± 39
524
478
445
396
364
SEF1.001.001.001.001.021.041.081.141.181.261.33
Rate
9.27
8.56
8.39
8.44
8.61
8.88
9.53
10.18
10.79
11.83
12.84

MACS:
Reference: MDD09c,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: 2009

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
184Pt
17.30 m
β+
185Pt
1.18 h
β+
186Pt
2.08 h
β+
187Pt
2.35 h
β+
188Pt
10.20 d
β+
183Ir
57.00 m
β+
184Ir
3.09 h
β+
185Ir
14.40 h
β+
186Ir
16.64 h
β+
187Ir
10.50 h
β+
182Os
22.10 h
β+
183Os
13.00 h
β+
184Os
0.02
590 mb
185Os
93.60 d
β+
186Os
1.59
422 mb
181Re
19.90 h
β+
182Re
2.67 d
β+
183Re
70.00 d
β+
184Re
38.00 d
β+
185Re
37.4
1535 mb
180W
0.12
660 mb
181W
121.20 d
β+
182W
26.5
274 mb
183W
14.31
515 mb
184W
30.64
223 mb
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Isotope: Osmium
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