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
Go to isotope
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]
0.0768 ± 7--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
768.3 ± 7.2
1998cVdG, 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:624mb(kT=30keV)AlC79
510
1971sAGM71
667
2000tRaT99
757
1981tHar81
990
1976tHWF76
685
2002tMOST 2002Gor02
510
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
sSemiempirical estimates given in the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1863
1322
1077
936
840
768 ± 7
665
592
539
464
414
SEF1.001.001.011.051.101.151.241.301.351.431.50
Rate
1.10
1.11
1.12
1.17
1.23
1.28
1.38
1.44
1.49
1.58
1.65

MACS:
Reference: WVK98c
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: 1998

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
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
right
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Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Ytterbium