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
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
169Er 170Er




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0653 ± 114*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
481
2000tRaT99
609
1976tHWF76
493
2002tMOST 2002Gor02
366
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:
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1926
1244
984
835
731
653 ± 114
539
459
401
320
269
SEF1.001.001.001.001.001.001.011.021.041.061.09
Rate
1.14
1.04
1.01
0.99
0.97
0.95
0.91
0.88
0.85
0.81
0.78

MACS:
Reference:
Procedure: 't' (The MACS from kT=5 keV to 100 keV are obtained from theoretical calculations with corresponding uncertainties between 25 and 50% in most cases.)
Year: 2000

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
169Yb
32.02 d
β+
170Yb
3.04%
768 mb
171Yb
14.28%
1210 mb
172Yb
21.83%
341 mb
173Yb
16.13%
754 mb
168Tm
93.10 d
β+
169Tm
100%
1129 mb
170Tm
128.59 d
1870 mb, β-
171Tm
1.92 a
486 mb, β-
172Tm
2.65 d
β-
167Er
22.869%
1425 mb
168Er
26.978%
338 mb
169Er
9.39 d
653 mb, β-
170Er
14.91%
170 mb
171Er
7.52 h
β-
166Ho
1.12 d
β-
167Ho
3.00 h
β-
168Ho
2.99 m
β-
169Ho
4.72 m
β-
170Ho
2.76 m
β-
165Dy
2.33 h
β-
166Dy
3.40 d
β-
167Dy
6.20 m
β-
168Dy
8.70 m
β-
169Dy
39.00 s
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Erbium