Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Iridium (Z=77)
  191Ir   192Ir   193Ir
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
193Ir 194Ir




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0994 ± 70--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
994 ± 70
1997cVdG, Act., 1/v(kT), Au:RaK88Jaa97
864 ± 43
1978bLinac, TOF, 6Li+235U:B-VMDM78
600 ± 80
1971eAGM71
1120
2006eendfb7
949.0
2004ejeff31
655
2000tRaT99
1132
1981tHar81
1120
1976tHWF76
554
2002tMOST 2002Gor02
472
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
bCalculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
3100
2000
1540
1280
1110
994 ± 70
832
727
653
561
507
SEF1.001.001.001.021.031.061.101.131.161.201.22
Rate
1.84
1.68
1.59
1.54
1.52
1.52
1.53
1.54
1.55
1.59
1.64

MACS:
Reference: MDM78,Jaa97
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: 1997

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

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
193Au
17.65 h
β+
194Au
1.58 d
β+
195Au
186.11 d
β+
196Au
6.17 d
β+
197Au
100%
582 mb
192Pt
0.782%
590 mb
193Pt
50.01 a
1123 mb, β+
194Pt
32.967%
365 mb
195Pt
33.832%
860 mb
196Pt
25.242%
183 mb
191Ir
37.3%
1350 mb
192Ir
73.83 d
2080 mb, β-
193Ir
62.7%
994 mb
194Ir
19.28 h
β-
195Ir
2.50 h
β-
190Os
26.36%
274 mb
191Os
15.40 d
1290 mb, β-
192Os
40.93%
155 mb
193Os
1.25 d
β-
194Os
6.00 a
β-
189Re
1.01 d
β-
190Re
3.10 m
β-
191Re
9.80 m
β-
192Re
16.00 s
β-
193Re
30.00 s
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Iridium