Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Contact]
p-process
Available isotopes for Osmium (Z=76)
  184Os   186Os   187Os   188Os   189Os   190Os   191Os   192Os   193Os   194Os
Go to isotope
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]
1.0584 ± 49--
0.3590 ± 43--
0.0657 ± 202*--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is recalculated from MDD09c with normalized energy dependencies of jeff30A,jendl40. Uncertainty is 7.2% from MDD09c plus deviation between both normalized evaluations.
Last review: March 2014
List of all available values
originalrenorm.yeartypeCommentRef
584 ± 49
2009,2013rVdG, Act., Au:RaK88; en. dep. from jeff30A,jendl40MDD09c
590 ± 43
2009cVdG, Act., Au:RaK88; en. dep. from NON-SMOKER RaT99MDD09c
723.3
2011eJENDL-4.0jendl40
400
1971sAGM71
705
2005tMOST 2005Gor05
693
2002tMOST 2002Gor02
789
2000tNON-SMOKERRaT99
480
1981tHar81
869
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:
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
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
1446 ± 191
-
980 ± 84
800 ± 60
700 ± 52
633 ± 50
584 ± 49
511 ± 50
459 ± 51
418 ± 51
359 ± 52
320 ± 52
Xfactor1.001.001.001.000.980.940.880.740.600.500.360.28
SEF1.001.001.001.001.001.021.041.081.141.181.261.33
Rate
8.57
-
8.22
8.22
8.34
8.53
8.79
9.30
9.78
10.14
10.73
11.29

MACS:
Reference: MDD09c,jeff30A,jendl40
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: 2013

X-factor:
Reference: Rau12
Year: 2012

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

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


Isotope: Osmium