Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Samarium (Z=62)
  144Sm   146Sm   147Sm   148Sm   149Sm   150Sm   151Sm   152Sm   153Sm   154Sm
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
154Sm 155Sm




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0216.9 ± 9.7--
0.2206 ± 9--
0.0206 ± 12--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is from BSA01 recalculated with normalized evaluated energy dependencies (f=0.77) from the libraries (endfb71,jendl40). Uncertainty is 4.4% plus deviation between libraries. Note that there is a discrepancy between the recommended value and earlier TOF measurements. More investigation needed!
Last review: August 2013
List of all available values
originalrenorm.yeartypeCommentRef
206 ± 9
216.9 ± 9.72001,2013rVdG, Act., 1/v(kT), Au:RaK88; renorm. using en.dep. of jendl40 and endfb71BSA01
269 ± 16
E(n)= 30 (5) keV
1999cPelletron, TOF, Au:ENDF/B-VI and MaG67bDIM99
206 ± 9
2001cVdG, Act., 1/v(kT), Au:RaK88BSA01
206 ± 12
1995cVdG, Act., 1/v(kT), Au:RaK88Sto93
291 ± 19
2701978bVdG, TOF, 10B:Mag75, Au:628 mb(kT= 30 keV)KYP78
325 ± 60
1967cVdG, TOF, 181Ta:762 mbMaG67a
279.7
2011eENDF/B-VII.1endfb71
283.3
2011eJENDL-4.0jendl40
227.1
2004eJEFF-3.1jeff31
253.6
2002eJENDL-3.3jendl33
297
1997eMug97
215
1979eIWY79
380 ± 60
1971eAGM71
238
2005tMOST 2005Gor05
276
2002tMOST 2002Gor02
219
2000tNON-SMOKERRaT99
521
1981tHar81
219
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
bCalculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
534.5 ± 36.6
-
382.2 ± 18.3
313.8 ± 16.1
271.2 ± 13.1
240.6 ± 10.8
216.9 ± 9.7
182.1 ± 8.5
157.5 ± 7.3
139.2 ± 6.5
114.1 ± 5.3
98.0 ± 4.5
Xfactor1.001.001.000.960.880.770.670.500.390.310.220.16
SEF1.001.001.001.021.051.091.131.201.271.341.461.57
Rate
3.17
-
3.21
3.28
3.37
3.47
3.55
3.67
3.76
3.83
3.95
4.07

MACS:
Reference: BSA01,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 107 cm3/mole/s, including SEF
Chart of nuclei
up
left
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-
150Nd
5.6
159 mb
151Nd
12.44 m
β-
152Nd
11.40 m
β-
153Nd
31.60 s
β-
154Nd
25.90 s
β-
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Isotope: Samarium