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)
175Yb 176Yb




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0558 ± 83*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
589
2000tRaT99
231 ± 76
1988tZZC88
986
1976tHWF76
369
2002tMOST 2002Gor02
302
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:
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1578
1032
816
696
616
558 ± 83
477
422
381
322
282
SEF1.001.001.001.001.000.990.990.970.960.930.90
Rate
9.36
8.65
8.38
8.25
8.14
8.06
7.89
7.72
7.53
7.13
6.75

MACS:
Reference:
Procedure: 't' (The MACS from kT=5 keV to 100 keV are obtained from theoretical calculations with corresponding uncertainties between 25 and 50% in most cases.)
Year: 2000

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

Rate:
Reaction rate NA<σv> given in 107 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
175Hf
70.00 d
β+
176Hf
5.26%
455 mb
177Hf
18.6%
1500 mb
178Hf
27.28%
314 mb
179Hf
13.62%
956 mb
174Lu
3.31 a
β+
175Lu
97.41%
1146 mb
176Lu
37.61x109 y
1532 mb, β-
177Lu
6.65 d
β-
178Lu
28.40 m
β-
173Yb
16.13%
754 mb
174Yb
31.83%
151 mb
175Yb
4.18 d
558 mb, β-
176Yb
12.76%
115.8 mb
177Yb
1.91 h
β-
172Tm
2.65 d
β-
173Tm
8.24 h
β-
174Tm
5.40 m
β-
175Tm
15.20 m
β-
176Tm
1.90 m
β-
171Er
7.52 h
β-
172Er
2.05 d
β-
173Er
1.40 m
β-
174Er
3.20 m
β-
175Er
1.20 m
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Ytterbium