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)
173Yb 174Yb




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0754 ± 7--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
753.8 ± 7.4
1998cVdG, TOF, Au:RaK88,Mac82eWVK98c,WVA00
868 ± 43
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
865 ± 72
8021974cVdG, TOF, 10B:Mag75, Au:628mb(kT=30keV)SKP74b
990
1971sAGM71
900
2000tRaT99
1116
1981tHar81
1130
1976tHWF76
595
2002tMOST 2002Gor02
401
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
2192
1456
1139
960
841
754 ± 7
633
552
492
410
355
SEF1.001.001.001.000.990.990.990.980.980.980.97
Rate
1.30
1.22
1.17
1.14
1.11
1.09
1.05
1.02
0.99
0.95
0.92

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
173Hf
23.60 h
β+
174Hf
0.16%
956 mb
175Hf
70.00 d
β+
176Hf
5.26%
455 mb
177Hf
18.6%
1500 mb
172Lu
6.70 d
β+
173Lu
1.37 a
β+
174Lu
3.31 a
β+
175Lu
97.41%
1146 mb
176Lu
37.61x109 y
1532 mb, β-
171Yb
14.28%
1210 mb
172Yb
21.83%
341 mb
173Yb
16.13%
754 mb
174Yb
31.83%
151 mb
175Yb
4.18 d
558 mb, β-
170Tm
128.59 d
1870 mb, β-
171Tm
1.92 a
486 mb, β-
172Tm
2.65 d
β-
173Tm
8.24 h
β-
174Tm
5.40 m
β-
169Er
9.39 d
653 mb, β-
170Er
14.91%
170 mb
171Er
7.52 h
β-
172Er
2.05 d
β-
173Er
1.40 m
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Ytterbium