Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Contact]
p-process
Available isotopes for Europium (Z=63)
  151Eu   152Eu   153Eu   154Eu   155Eu
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
155Eu 156Eu




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.01320 ± 84--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
1320 ± 84
1995cVdG, Act., 1/v(kT), Au:RaK88JaK95
1136
2006eendfb7
1339
2004ejeff31
1141
2002ejendl33
1374
2000tRaT99
2088
1981tHar81
1730
1976tHWF76
1452
2002tMOST 2002Gor02
1107
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
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
4661
2806
2112
1736
1493
1320 ± 84
1082
923
807
646
540
SEF1.001.001.001.000.990.980.970.950.930.910.89
Rate
2.77
2.35
2.17
2.05
1.96
1.89
1.75
1.64
1.54
1.39
1.28

MACS:
Reference: RaT99,JaK95
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: 1995

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
155Tb
5.32 d
β+
156Tb
5.35 d
β+
157Tb
71.01 a
β+
158Tb
179.99 a
β+
159Tb
100%
1580 mb
154Gd
2.18%
1028 mb
155Gd
14.8%
2648 mb
156Gd
20.47%
615 mb
157Gd
15.65%
1369 mb
158Gd
24.84%
324 mb
153Eu
52.19%
2780 mb
154Eu
8.59 a
4420 mb, β-
155Eu
4.75 a
1320 mb, β-
156Eu
15.19 d
β-
157Eu
15.18 h
β-
152Sm
26.75%
473 mb
153Sm
1.93 d
1095 mb, β-
154Sm
22.75%
206 mb
155Sm
22.30 m
β-
156Sm
9.40 h
β-
151Pm
1.18 d
β-
152Pm
4.12 m
β-
153Pm
5.25 m
β-
154Pm
2.68 m
β-
155Pm
41.50 s
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Europium