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   156Eu
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
154Eu 155Eu




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0X ± Y*--
0.04420 ± 670--

(Version 0.0 corresponds to Bao et al.)
Comment
No exp. data available apart from a mass spectroscopic measurement from ASH81 quoted in BVW92. Since we have no access to this data we decided to use a new semi-empirical value as recommendation.
Last review: August 2014
List of all available values
originalrenorm.yeartypeCommentRef
4420
1981rMass spectrometric measurement, quoted from BVW92ASH81
3482
2011eENDF/B-VII.1endfb71
3476
2011eJENDL-4.0jendl40
3075
2004eJEFF-3.1jeff31
3575
2002eJENDL-3.3jendl33
4300
1988eKWN88
5214
2005tMOST 2005Gor05
6075
2002tMOST 2002Gor02
4169
2000tNON-SMOKERRaT99
2989
1981tHar81
4450
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
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
-
Xfactor1.001.001.000.980.930.850.750.570.430.340.220.16
SEF1.001.001.001.000.990.970.940.880.840.810.770.75
Rate------------

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

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 100 cm3/mole/s, including SEF
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: (S, M, L, XL or Alberto)


Isotope: Europium