Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Contact]
p-process
Available isotopes for Cerium (Z=58)
  132Ce   133Ce   134Ce   135Ce   136Ce   137Ce   138Ce   139Ce   140Ce   141Ce   142Ce
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
136Ce 137Ce




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0328 ± 21-28.2 ± 1.6

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is from KTS96. Isomeric ratio at kT= 30 keV is IR= 0.086 KTS96. The previous MACS vs. kT tables had a typo, only the measured partial cross section to the ground-state was included.
Last review: July 2013
List of all available values
originalrenorm.yeartypeCommentRef
328 ± 21
1996cVdG, Act., 1/v(kT), Au:RaK88KTS96
338.8
2011eENDF/B-VII.1endfb71
100
1971sAGM71
206
2005tMOST 2005Gor05
225
2002tMOST 2002Gor02
595
2000tNON-SMOKERRaT99
262
1996tKTS96
398
1981tHar81
629
1976tHWF76
Partial cross section to 137mCe:
28.2 ± 1.6
1996cVdG, Act., 1/v(kT), Au:RaK88KTS96


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
sSemiempirical estimates given in the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1104
-
569
449
390
353
328 ± 21
295
275
261
246
238
Xfactor1.001.001.001.001.001.001.001.001.001.000.990.97
SEF1.001.001.001.001.001.001.001.001.001.001.001.01
Rate
6.55
-
4.78
4.62
4.63
4.68
4.77
4.95
5.16
5.37
5.86
6.39

MACS:
Reference: RaT99,KTS96
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: 1996

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
136Nd
50.65 m
β+
137Nd
38.50 m
β+
138Nd
5.04 h
β+
139Nd
29.70 m
β+
140Nd
3.37 d
β+
135Pr
24.00 m
β+
136Pr
13.10 m
β+
137Pr
1.28 h
β+
138Pr
1.45 m
β+
139Pr
4.41 h
β+
134Ce
3.16 d
967 mb, β+
135Ce
17.70 h
1320 mb, β+
136Ce
0.185
328 mb
137Ce
9.00 h
973 mb, β+
138Ce
0.251
179 mb
133La
3.91 h
β+
134La
6.45 m
β+
135La
19.50 h
β+
136La
9.87 m
β+
137La
59.99 ka
β+
132Ba
0.101
397 mb
133Ba
10.52 a
β+
134Ba
2.417
176 mb
135Ba
6.592
455 mb
136Ba
7.854
61.2 mb
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Cerium