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   156Eu
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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]
1.01333 ± 133--
0.01320 ± 84--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is value from JaK95 (using gamma-line intensities of NDS12) and renormalized with recent evaluations of endfb71 and jendl40. Uncertainty is 9.6 % as in JaK95 plus deviation of both evaluations.
Last review: September 2013
List of all available values
originalrenorm.yeartypeCommentRef
1320 ± 84
1333 ± 1331995,2013rVdG, Act., 1/v(kT), Au:RaK88; gamma intensities from NDS12; energy dep. from endfb71 and jendl40JaK95
1320 ± 84
1995cVdG, Act., 1/v(kT), Au:RaK88JaK95
1136
2011eENDF/B-VII.1endfb71
1264
2011eJENDL-4.0jendl40
1339
2004eJEFF-3.1jeff31
1141
2002eJENDL-3.3jendl33
1107
2005tMOST 2005Gor05
1452
2002tMOST 2002Gor02
1374
2000tNON-SMOKERRaT99
2088
1981tHar81
1730
1976tHWF76


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
cDirectly quoted from the reference itself
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
4258 ± 684
-
2649 ± 347
2044 ± 232
1711 ± 176
1492 ± 144
1333 ± 133
1109 ± 114
954 ± 99
839 ± 87
676 ± 70
566 ± 58
Xfactor1.001.001.000.990.970.940.890.790.700.610.470.38
SEF1.001.001.001.001.000.990.980.970.950.930.910.89
Rate
2.53
-
2.22
2.10
2.02
1.96
1.91
1.80
1.69
1.61
1.45
1.34

MACS:
Reference: JaK95,endfb71,jendl40
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: 2013

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
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-
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Style: (S, M, L, XL or Alberto)


Isotope: Europium