Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Erbium (Z=68)
  162Er   164Er   166Er   167Er   168Er   169Er   170Er
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
170Er 171Er




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0170 ± 7--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
170 ± 7
1996cVdG, Act., 1/v(kT), Au:RaK88Bes96
223 ± 33
2071978bVdG, TOF, 10B:Mag75, Au:628mb(kT=30keV)KYP78
144 ± 43
1331974cVdG, TOF, 10B:SPU71, Au:628mb(kT=30keV)SKP74a
275 ± 50
1968bVdG, Act., 235U:Whi65SSK68
250 ± 30
1971eAGM71
216.1
2006eendfb7
207.3
2004ejeff31
207.3
2002ejendl33
158
2000tRaT99
293
1981tHar81
188
1976tHWF76
195
2002tMOST 2002Gor02
154
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
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
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
600
374
280
228
194
170 ± 7
138
117
103
85.4
75.6
SEF1.001.001.011.041.081.121.211.291.361.501.63
Rate
3.56
3.14
2.91
2.82
2.78
2.78
2.80
2.83
2.89
3.05
3.27

MACS:
Reference: KYP78
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: 1978

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
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-
167Ho
3.00 h
β-
168Ho
2.99 m
β-
169Ho
4.72 m
β-
170Ho
2.76 m
β-
171Ho
53.00 s
β-
166Dy
3.40 d
β-
167Dy
6.20 m
β-
168Dy
8.70 m
β-
169Dy
39.00 s
β-
170Dy
30.00 s
β-
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Isotope: Erbium
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