Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Ytterbium (Z=70)
  168Yb   170Yb   171Yb   172Yb   173Yb   174Yb   175Yb   176Yb
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
170Yb 171Yb




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0817 ± 11--
0.0781.7 ± 1.1--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value and MACS vs. kT values are from WVA00. Extrapolation to kT= 5 keV done with jendl40.
Last review: In process
List of all available values
originalrenorm.yeartypeCommentRef
768.3 ± 7.2
817 ± 111998dVdG, TOF, Au:RaK88,Mac82eWVK98c,WVA00
989 ± 50
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
738 ± 29
7311984cVdG, TOF, Au:Mac82eBWM84
766 ± 30
7131981cVdG, TOF, Au:B-IVBKW81
790 ± 60
7391979cVdG, TOF, Au:624 mb(kT= 30 keV)AlC79
776.2
2011eJENDL-4.0 jendl40
510
1971sAGM71
510
2005tMOST 2005Gor05
685
2002tMOST 2002Gor02
667
2000tNON-SMOKERRaT99
757
1981tHar81
990
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:
dRenormalized 2017 based on updated Au measurement
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
1985 ± 107
1554 ± 50
1389 ± 36
1140 ± 21
994 ± 16
893 ± 13
817 ± 11
706 ± 10
629 ± 9
573 ± 9
496 ± 10
446 ± 13
Xfactor1.001.001.000.970.890.780.670.500.390.320.230.18
SEF1.001.001.001.011.051.101.151.241.301.351.431.50
Rate
1.18
1.17
1.17
1.19
1.24
1.30
1.37
1.46
1.53
1.59
1.68
1.78

MACS:
Reference: Rei18
Procedure: 'd' (Renormalized 2017 based on updated Au measurement)
Year: 2018

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Chart of nuclei
up
left
170Hf
16.01 h
β+
171Hf
12.10 h
β+
172Hf
1.87 a
β+
173Hf
23.60 h
β+
174Hf
0.16
956 mb
169Lu
1.42 d
β+
170Lu
2.01 d
β+
171Lu
8.24 d
β+
172Lu
6.70 d
β+
173Lu
1.37 a
β+
168Yb
0.13
1214 mb
169Yb
32.02 d
β+
170Yb
3.04
768 mb
171Yb
14.28
1210 mb
172Yb
21.83
341 mb
167Tm
9.25 d
β+
168Tm
93.10 d
β+
169Tm
100
1129 mb
170Tm
128.59 d
1870 mb, β-
171Tm
1.92 a
486 mb, β-
166Er
33.503
563 mb
167Er
22.869
1425 mb
168Er
26.978
338 mb
169Er
9.39 d
653 mb, β-
170Er
14.91
170 mb
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Style: (S, M, L, XL or Alberto)


Isotope: Ytterbium