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   193Os   194Os
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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]
1.0414 ± 17--
0.3410 ± 17--
0.0422 ± 16--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is from MFM10 with stellar enhancement factors (SEF) from cite{FMM10. Uncertainty of SEF is up to 1.2%. Does the X factor need to be recalculated???
Last review: March 2014
List of all available values
originalrenorm.yeartypeCommentRef
414 ± 17
2010cTOF, Pb Spall., AuMFM10
410 ± 30
E(n)= 31 (5) keV
2007cPelletron, TOF, Au:endfb7 and MaG67bSMN07
418 ± 16
1982cLinac, TOF, 6Li, Au:Sat.WMH80,WiM82
405 ± 30
E(n)= 32 (4) keV
1981cLinac, TOF, 6Li:B-IV, 165Ho:Sat.BrB81
456.6
2011eJENDL-4.0jendl40
330
1971sAGM71
663
2005tMOST 2005Gor05
1430
2002tMOST 2002Gor02
634
2000tNON-SMOKERRaT99
421
1981tHar81
734
1976tHWF76


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
eEvaluated value taken directly from the reference
sSemiempirical estimates given in the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1118 ± 44
799 ± 32
693 ± 28
552 ± 23
483 ± 20
441 ± 19
414 ± 17
375 ± 16
347 ± 14
325 ± 13
291 ± 12
267 ± 11
Xfactor1.001.001.001.000.990.960.920.790.660.560.410.32
SEF1.001.001.001.001.001.011.031.071.121.161.251.33
Rate
6.63
5.99
5.81
5.67
5.74
5.92
6.18
6.72
7.26
7.76
8.61
9.42

MACS:
Reference: MFM10
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: 2010

X-factor:
Reference: Rau12
Year: 2012

SEF (Stellar enhancement factor):
Reference: FMM10
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 107 cm3/mole/s, including SEF
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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Style: (S, M, L, XL or Alberto)


Isotope: Osmium