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




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.01350 ± 43--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is from Jaa97. MACS vs. kT table are normalized values from endfb71 and jeff312. Uncertainty for extrapolated values is from covariace data endfb71 plus deviation between both libraries. Stellar enhancement factors corrected Rau09.
Last review: April 2014
List of all available values
originalrenorm.yeartypeCommentRef
1016.5 ± 57.2
E(n)= 55 (8) keV
2009cF.N.B., Act., 197Au: 414.6 mb (ENDF/B-VI.8) TAH09
1350 ± 43
1997cVdG, Act., 1/v(kT), Au:RaK88Jaa97
1345 ± 67
1978bLinac, TOF, 6Li+235U:B-VMDM78
1271 ± 118
2011eENDF/B-VII.1 incl. covariancesendfb71
1513
2004eJEFF-3.1jeff31
1900 ± 300
1971eAGM71
1071
2005tMOST 2005Gor05
1076
2002tMOST 2002Gor02
968
2000tNON-SMOKERRaT99
1789
1981tHar81
1770
1976tHWF76
Partial cross section to 192m1Ir:
9200 ± 911
E(n)= 25 (5) keV
1972cSb-Be, Act., 1/v(E), 127I:836 (26) mbSRS72


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
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
4532 ± 219
-
2765 ± 170
2094 ± 164
1735 ± 151
1508 ± 90
1350 ± 43
1140 ± 78
1003 ± 105
905 ± 98
773 ± 87
684 ± 79
Xfactor1.001.001.001.000.990.980.950.860.750.640.470.36
SEF1.001.001.001.001.001.001.001.001.001.011.051.09
Rate
2.69
-
2.32
2.15
2.06
2.00
1.96
1.91
1.88
1.88
1.92
1.98

MACS:
Reference: Jaa97, endfb71, jeff312
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: 1997,2013

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Chart of nuclei
up
left
191Au
3.18 h
β+
192Au
4.94 h
β+
193Au
17.65 h
β+
194Au
1.58 d
β+
195Au
186.11 d
β+
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-
right
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Style: (S, M, L, XL or Alberto)


Isotope: Iridium