Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Europium (Z=63)
  151Eu   152Eu   153Eu   154Eu   155Eu
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
154Eu 155Eu




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.04420 ± 670--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
4420
1981rMass spectrometric measurement, quoted from BVW92ASH81
4300
1988eKWN88
3482
2006eendfb7
3075
2004ejeff31
3575
2002ejendl33
4480
2000tRaT99
2989
1981tHar81
4450
1976tHWF76
6075
2002tMOST 2002Gor02
5214
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:
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
12940
7829
6427
5552
4914
4420 ± 670
3687
3166
2774
2222
1852
SEF1.001.001.000.990.970.940.880.840.810.770.75
Rate
7.68
6.57
6.58
6.50
6.30
6.04
5.47
4.98
4.59
4.04
3.67

MACS:
Reference: RaT99,ASH81
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: 1981

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
154Tb
21.50 h
β+
155Tb
5.32 d
β+
156Tb
5.35 d
β+
157Tb
71.01 a
β+
158Tb
179.99 a
β+
153Gd
240.41 d
4550 mb, β+
154Gd
2.18%
1028 mb
155Gd
14.8%
2648 mb
156Gd
20.47%
615 mb
157Gd
15.65%
1369 mb
152Eu
13.51 a
7600 mb, β+
153Eu
52.19%
2780 mb
154Eu
8.59 a
4420 mb, β-
155Eu
4.75 a
1320 mb, β-
156Eu
15.19 d
β-
151Sm
90.00 a
2710 mb, β-
152Sm
26.75%
473 mb
153Sm
1.93 d
1095 mb, β-
154Sm
22.75%
206 mb
155Sm
22.30 m
β-
150Pm
2.68 h
β-
151Pm
1.18 d
β-
152Pm
4.12 m
β-
153Pm
5.25 m
β-
154Pm
2.68 m
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Europium