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)
172Yb 173Yb




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

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
341.3 ± 3.0
1998cVdG, TOF, Au:RaK88,Mac82eWVK98c,WVA00
420 ± 25
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
410 ± 34
3801974cVdG, TOF, 10B:SPU71, Au:628mb(kT=30keV)SKP74b
380
1971sAGM71
366
2000tRaT99
401
1981tHar81
534
1976tHWF76
325
2002tMOST 2002Gor02
254
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
827
599
488
423
377
341 ± 3
290
254
227
190
166
SEF1.001.001.021.071.121.171.261.331.391.501.59
Rate
4.90
5.03
5.12
5.35
5.60
5.82
6.13
6.34
6.49
6.74
7.00

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 107 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
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: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Ytterbium