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)
176Yb 177Yb




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0123 ± 2--
0.3115.8 ± 2.0--
0.0116 ± 2--

(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
114 ± 9
2008 cVdG, Act., Au:RaK88; energy dep. from jeff30A,jendl40JM08,MDD14
115.9 ± 2.0
123 ± 21998dVdG, TOF, Au:RaK88,Mac82eWVK98c,WVA00
136 ± 11
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
111 ± 11
1031974bVdG, TOF, 10B:Mag75,SPU71, Au:628 mb(kT= 30 keV)SKP74b
210 ± 31
E(n)= 23 (5)
1974cSb-Be, Act., 1/v(E), 127I:832 (26) mb (24 keV)SSR74
208 ± 40
1968bVdG, Act., 235U:Whi65SSK68
121.0
2011eJENDL-4.0 jendl40
200 ± 50
1971eAGM71
118
2005tMOST 2005Gor05
142
2002tMOST 2002Gor02
127
2000tNON-SMOKERRaT99
152
1981tHar81
183
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:
cDirectly quoted from the reference itself
dRenormalized 2017 based on updated Au measurement
bCalculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
328 ± 22
254 ± 11
226 ± 8
183 ± 5
156 ± 4
138 ± 3
123 ± 2
102 ± 2
87 ± 2
76 ± 1
62 ± 1
52 ± 1
Xfactor1.001.001.000.970.890.780.670.500.390.310.210.16
SEF1.001.001.001.011.041.081.121.201.281.361.511.65
Rate
1.95
1.91
1.90
1.91
1.93
1.98
2.00
2.06
2.09
2.12
2.22
2.28

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 107 cm3/mole/s, including SEF
Chart of nuclei
up
left
176Hf
5.26
455 mb
177Hf
18.6
1500 mb
178Hf
27.28
314 mb
179Hf
13.62
956 mb
180Hf
35.08
179 mb
175Lu
97.41
1146 mb
176Lu
37.61x109 y
1532 mb, β-
177Lu
6.65 d
β-
178Lu
28.40 m
β-
179Lu
4.59 h
β-
174Yb
31.83
151 mb
175Yb
4.18 d
558 mb, β-
176Yb
12.76
115.8 mb
177Yb
1.91 h
β-
178Yb
1.23 h
β-
173Tm
8.24 h
β-
174Tm
5.40 m
β-
175Tm
15.20 m
β-
176Tm
1.90 m
β-
177Tm
1.50 m
β-
172Er
2.05 d
β-
173Er
1.40 m
β-
174Er
3.20 m
β-
175Er
1.20 m
β-
176Er
20.00 s
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Ytterbium