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)
162Er 163Er




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.01624 ± 124--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
1624 ± 124
1996cVdG, Act., 1/v(kT), Au:RaK88JaK96b
900
1971sAGM71
868.3
2006eendfb7
868.3
2004ejeff31
868.3
2002ejendl33
1042
2000tRaT99
1534
1981tHar81
1670
1976tHWF76
1808
2002tMOST 2002Gor02
1611
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
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
4906
2646
2152
1902
1741
1624 ± 124
1459
1346
1262
1144
1065
SEF1.001.001.001.021.051.091.171.231.281.351.40
Rate
2.91
2.22
2.22
2.31
2.43
2.58
2.86
3.11
3.31
3.65
3.96

MACS:
Reference: RaT99,JaK96b
Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.)
Year: 1996

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
162Yb
18.87 m
β+
163Yb
11.05 m
β+
164Yb
1.26 h
β+
165Yb
9.90 m
β+
166Yb
2.36 d
β+
161Tm
30.20 m
β+
162Tm
21.70 m
β+
163Tm
1.81 h
β+
164Tm
2.00 m
β+
165Tm
1.25 d
β+
160Er
1.19 d
β+
161Er
3.21 h
β+
162Er
0.139%
1624 mb
163Er
1.25 h
β+
164Er
1.601%
1084 mb
159Ho
33.05 m
β+
160Ho
25.60 m
β+
161Ho
2.48 h
β+
162Ho
15.00 m
β+
163Ho
4.57 ka
2125 mb, β+
158Dy
0.1%
1060 mb
159Dy
144.44 d
β+
160Dy
2.34%
890 mb
161Dy
18.91%
1964 mb
162Dy
25.51%
446 mb
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Erbium