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)
166Er 167Er




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0563 ± 56--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
608 ± 61
5631978bVdG, TOF, 10B:Mag75, Au:628mb(kT=30keV)KYP78
519 ± 156
4811974cVdG, TOF, 10B:SPU71, Au:628mb(kT=30keV)SKP74a
560
1971sAGM71
700.8
2006eendfb7
706.0
2004ejeff31
706.0
2002ejendl33
436
2000tRaT99
739
1981tHar81
657
1976tHWF76
518
2002tMOST 2002Gor02
476
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:
bCalculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
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
1304
970
802
695
620
563 ± 56
481
426
385
332
299
SEF1.001.001.001.011.021.041.121.211.301.471.58
Rate
7.73
8.14
8.25
8.30
8.40
8.55
9.01
9.65
10.31
11.57
12.55

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
166Yb
2.36 d
β+
167Yb
17.50 m
β+
168Yb
0.13%
1214 mb
169Yb
32.02 d
β+
170Yb
3.04%
768 mb
165Tm
1.25 d
β+
166Tm
7.70 h
β+
167Tm
9.25 d
β+
168Tm
93.10 d
β+
169Tm
100%
1129 mb
164Er
1.601%
1084 mb
165Er
10.36 h
β+
166Er
33.503%
563 mb
167Er
22.869%
1425 mb
168Er
26.978%
338 mb
163Ho
4.57 ka
2125 mb, β+
164Ho
29.00 m
β+
165Ho
100%
1280 mb
166Ho
1.12 d
β-
167Ho
3.00 h
β-
162Dy
25.51%
446 mb
163Dy
24.9%
1112 mb
164Dy
28.18%
212 mb
165Dy
2.33 h
β-
166Dy
3.40 d
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Erbium