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)
173Yb 174Yb




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0801 ± 11--
0.0754 ± 7--

(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
753.8 ± 7.4
801 ± 111998dVdG, TOF, Au:RaK88,Mac82eWVK98c,WVA00
868 ± 43
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
865 ± 72
8021974cVdG, TOF, 10B:Mag75, Au:628 mb(kT= 30 keV)SKP74b
773.2
2011eJENDL-4.0 jendl40
990
1971sAGM71
401
2005tMOST 2005Gor05
595
2002tMOST 2002Gor02
900
2000tNON-SMOKERRaT99
1116
1981tHar81
1130
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
2354 ± 145
1752 ± 67
1530 ± 46
1204 ± 25
1018 ± 17
893 ± 14
801 ± 12
672 ± 9
585 ± 8
521 ± 8
433 ± 8
375 ± 9
Xfactor1.001.001.000.990.980.950.920.840.760.700.580.48
SEF1.001.001.001.001.000.990.990.990.980.980.980.97
Rate
1.40
1.31
1.28
1.24
1.20
1.18
1.15
1.11
1.08
1.05
1.01
0.97

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
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: (S, M, L, XL or Alberto)


Isotope: Ytterbium