Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Disclaimer]   [Contact]
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)
174Yb 175Yb




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.3151.0 ± 1.7--
0.0151 ± 2--

(Version 0.0 corresponds to Bao et al.)
Comment
No significant change in recommended cross section. New value is weighted average of JM08 and WVA98c
Last review: July 9th, 2009
List of all available values
originalrenorm.yeartypeCommentRef
156 ± 6
2008 cVdG, Act., Au:RaK88; energy dep. from jeff30AJM08
150.5 ± 1.8
1998cVdG, TOF, Au:RaK88,Mac82eWVK98c,WVA00
173 ± 14
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
176 ± 16
1631974cVdG, TOF, 10B:Mag75,SPU71, Au:628mb(kT=30keV)SKP74b
275
1971sAGM71
172
2000tRaT99
167
1981tHar81
190
1976tHWF76
130
2002tMOST 2002Gor02
112
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
374
271
220
190
168
151 ± 2
125
108
95
78
67
SEF1.001.001.011.051.091.131.221.301.381.521.65
Rate
2.22
2.28
2.29
2.36
2.43
2.49
2.56
2.64
2.69
2.81
2.92

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 107 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
174Hf
0.16
956 mb
175Hf
70.00 d
β+
176Hf
5.26
455 mb
177Hf
18.6
1500 mb
178Hf
27.28
314 mb
173Lu
1.37 a
β+
174Lu
3.31 a
β+
175Lu
97.41
1146 mb
176Lu
37.61x109 y
1532 mb, β-
177Lu
6.65 d
β-
172Yb
21.83
341 mb
173Yb
16.13
754 mb
174Yb
31.83
151 mb
175Yb
4.18 d
558 mb, β-
176Yb
12.76
115.8 mb
171Tm
1.92 a
486 mb, β-
172Tm
2.65 d
β-
173Tm
8.24 h
β-
174Tm
5.40 m
β-
175Tm
15.20 m
β-
170Er
14.91
170 mb
171Er
7.52 h
β-
172Er
2.05 d
β-
173Er
1.40 m
β-
174Er
3.20 m
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Ytterbium
This page is not optimized for Microsoft Internet Explorer.