Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Lanthanum (Z=57)
  138La   139La
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
139La 140La




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.332.4 ± 3.1--
0.131.6 ± 0.8--
0.038.4 ± 2.7--

(Version 0.0 corresponds to Bao et al.)
Comment
MACS at kT= 5 keV is weighted mean of values from WDH06b and RTe06.
Last review: January 24th, 2007
List of all available values
originalrenorm.yeartypeCommentRef
113.7 ± 4.0
kT=5.1 keV
31.22006cVdG, Act., Au:HDJ05WDH06b
32.4 ± 3.1
2006cTOF, Pb Spall., AuRTe06
31.6 ± 0.8
2003cVdG, Act., Au:RaK88ODH03
28.8 ± 3.1
1990cVdG, Act., 1/v(kT), Au:655 (23)mb(24keV)XWY90
38.4 ± 2.7
1986cVdG, Act. ,1/v(kT), Au:B-V+Mac82eBee86
26.5 ± 8.0
22.21979cF.N.B., Act., 1/v(E), 127I:832mb(25keV)AJB79
39 ± 5
1978c,2Linac, TOF, 6Li, Au:Sat., k=1.0000MAM78a
50 ± 5
1977cLinac, TOF, 6Li+235U, Au:Sat.MAB77a
11.6
1970cSb-Be, Act.,1/v(E), Au:640mb(24keV)ChP70
44 ± 4
1971eAGM71
36.32
2006eendfb7
35.27
2004ejeff31
37.97
2002ejendl33
85
2000tRaT99
72
1981tHar81
40
1976tHWF76
41.4
2002tMOST 2002Gor02
45.9
2005tMOST 2005Gor05


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
2Including k from Ref. ABM82, where k is a correction factor which has been applied to the originally reported cross section
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
111.2 ± 3.2
  74.8 
 63.2 
 48.1
 40.3
 35.7
 32.4
 27.7
 23.6
 22.0
 18.4
 15.2
SEF1.001.01.001.001.001.001.000.990.990.980.960.94
Rate
6.60
5.61
5.30
4.94
4.78
4.73
4.70
4.62
4.37
4.42
4.18
3.79

MACS:
Reference: RTe07
Procedure: 'e' (The Maxwellian-averaged cross sections (MACS) from kT=5 keV to 100 keV are obtained from experimental data; the relative uncertainties are similar to those quoted for the 30 keV data.)
Year: 2007

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

Rate:
Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
139Pr
4.41 h
β+
140Pr
3.39 m
β+
141Pr
100
111.4 mb
142Pr
19.12 h
415 mb, β-
143Pr
13.57 d
350 mb, β-
138Ce
0.251
179 mb
139Ce
137.62 d
214 mb, β+
140Ce
88.45
11 mb
141Ce
32.51 d
76 mb, β-
142Ce
11.114
28 mb
137La
59.99 ka
β+
138La
102.01x109 y
419 mb, β+
139La
99.91
31.6 mb
140La
1.68 d
β-
141La
3.92 h
β-
136Ba
7.854
61.2 mb
137Ba
11.232
76.3 mb
138Ba
71.698
4 mb
139Ba
1.38 h
β-
140Ba
12.75 d
β-
135Cs
2.30 Ma
198 mb, β-
136Cs
13.04 d
β-
137Cs
30.03 a
β-
138Cs
33.41 m
β-
139Cs
9.27 m
β-
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Isotope: Lanthanum
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