Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Gadolinium (Z=64)
  148Gd   150Gd   152Gd   153Gd   154Gd   155Gd   156Gd   157Gd   158Gd   159Gd   160Gd
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
160Gd 161Gd




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0178 ± 25--
0.0154 ± 20--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is average of evaluated libraries (endfb71, jendl40). Uncertainty is deviation between both libraries plus uncertainty from covariance data of endfb71.
Last review: September 2013
List of all available values
originalrenorm.yeartypeCommentRef
200 ± 13
1992cVdG, TOF,6Li, 10B+Au:B-VBKP92
144 ± 14
1421984cVdG, Act., 1/v(kT), Au:657 mb (25 keV); b-decay of 161TbBKY84
192 ± 19
1781978bVdG, TOF, 10B:Mag75, Au:628 mb (kT= 30keV)KYP78
290 ± 41
E(n)= 23 (5) keV
2181973cSb-Be, Act., 1/v(E), 127I:836 mb (23 keV)SSR73
15 ± 7
E(n)= 25 (5) keV
121972cSb-Be, Act., 1/v(E), 127I:832 mb(24 keV)TRK72
170.4 ± 16.4
2011eENDF/B-VII.1 incl. covariancesendfb71
186.5
2011eJENDL-4.0jendl40
230.4
2004eJEFF-3.1jeff31
164.5
2002eJENDL-3.3jendl33
100 ± 30
1971eAGM71
174
2005tMOST 2005Gor05
207
2002tMOST 2002Gor02
167
2000tNON-SMOKERRaT99
265
1981tHar81
171
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:
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
512 ± 189
-
339 ± 77
271 ± 47
229 ± 36
200 ± 29
178 ± 25
147 ± 20
126 ± 17
110 ± 14
90 ± 11
77 ± 10
Xfactor1.001.001.000.950.860.740.630.460.360.280.200.15
SEF1.001.001.001.021.051.091.131.211.291.371.511.64
Rate
3.04
-
2.85
2.83
2.84
2.88
2.92
2.99
3.05
3.09
3.22
3.34

MACS:
Reference: 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
160Dy
2.34
890 mb
161Dy
18.91
1964 mb
162Dy
25.51
446 mb
163Dy
24.9
1112 mb
164Dy
28.18
212 mb
159Tb
100
1580 mb
160Tb
72.30 d
3240 mb, β-
161Tb
6.91 d
β-
162Tb
7.60 m
β-
163Tb
19.50 m
β-
158Gd
24.84
324 mb
159Gd
18.48 h
β-
160Gd
21.86
154 mb
161Gd
3.66 m
β-
162Gd
8.40 m
β-
157Eu
15.18 h
β-
158Eu
45.90 m
β-
159Eu
18.10 m
β-
160Eu
38.00 s
β-
161Eu
26.00 s
β-
156Sm
9.40 h
β-
157Sm
8.03 m
β-
158Sm
5.30 m
β-
159Sm
11.37 s
β-
160Sm
9.60 s
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Gadolinium