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)
172Yb 173Yb




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0364 ± 5--
0.0341 ± 3--

(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
341.3 ± 3.0
364 ± 51998dVdG, TOF, Au:RaK88,Mac82eWVK98c,WVA00
420 ± 25
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
410 ± 34
3801974cVdG, TOF, 10B:SPU71, Au:628 mb(kT= 30 keV)SKP74b
354.3
2011eJENDL-4.0 jendl40
380
1971sAGM71
254
2005tMOST 2005Gor05
325
2002tMOST 2002Gor02
366
2000tNON-SMOKERRaT99
401
1981tHar81
534
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
929 ± 54
720 ± 25
641 ± 18
522 ± 10
452 ± 7
402 ± 6
364 ± 5
309 ± 4
270 ± 4
241 ± 3
202 ± 4
177 ± 5
Xfactor1.001.001.000.950.850.730.620.460.360.290.210.16
SEF1.001.001.001.021.071.121.171.261.331.391.501.59
Rate
5.51
5.41
5.39
5.48
5.72
5.98
6.21
6.54
6.74
6.89
7.17
7.46

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
172Hf
1.87 a
β+
173Hf
23.60 h
β+
174Hf
0.16
956 mb
175Hf
70.00 d
β+
176Hf
5.26
455 mb
171Lu
8.24 d
β+
172Lu
6.70 d
β+
173Lu
1.37 a
β+
174Lu
3.31 a
β+
175Lu
97.41
1146 mb
170Yb
3.04
768 mb
171Yb
14.28
1210 mb
172Yb
21.83
341 mb
173Yb
16.13
754 mb
174Yb
31.83
151 mb
169Tm
100
1129 mb
170Tm
128.59 d
1870 mb, β-
171Tm
1.92 a
486 mb, β-
172Tm
2.65 d
β-
173Tm
8.24 h
β-
168Er
26.978
338 mb
169Er
9.39 d
653 mb, β-
170Er
14.91
170 mb
171Er
7.52 h
β-
172Er
2.05 d
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Ytterbium