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)
190Os 191Os




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.3274 ± 12--
0.0295 ± 45--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: July 9th, 2009
List of all available values
originalrenorm.yeartypeCommentRef
274 ± 12
2008 cVdG, Act., Au:RaK88; energy dep. from RaT99JM08
295 ± 45
1981cLinac, TOF, 6Li:B-IV, 165Ho:Sat.BrB81
320 ± 36
3411979cF.N.B., Act., 1/v(E), Au:621mb(24keV)BPS79
477 ± 71
23keV
3581973cSb-Be, Act., 1/v(E), 127I:836mb(23keV)SSR73
230
1971sAGM71
215
2000tRaT99
213
1981tHar81
577
1976tHWF76
365
2002tMOST 2002Gor02
403
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
679
451
367
322
294
274 ± 12
246
226
210
185
165
SEF1.001.001.001.001.001.011.021.051.081.151.22
Rate
4.03
3.78
3.77
3.82
3.91
4.00
4.22
4.44
4.66
5.05
5.33

MACS:
Reference: JM08,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: 2008

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
190Pt
650.00x109 y
508 mb, α
191Pt
2.86 d
β+
192Pt
0.782
590 mb
193Pt
50.01 a
1123 mb, β+
194Pt
32.967
365 mb
189Ir
13.20 d
β+
190Ir
11.78 d
β+
191Ir
37.3
1350 mb
192Ir
73.83 d
2080 mb, β-
193Ir
62.7
994 mb
188Os
13.29
399 mb
189Os
16.21
1168 mb
190Os
26.36
274 mb
191Os
15.40 d
1290 mb, β-
192Os
40.93
155 mb
187Re
41.20x109 y
1160 mb, β-
188Re
17.00 h
β-
189Re
1.01 d
β-
190Re
3.10 m
β-
191Re
9.80 m
β-
186W
28.43
235 mb
187W
23.72 h
β-
188W
69.78 d
β-
189W
10.70 m
β-
190W
30.00 m
β-
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Isotope: Osmium
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