Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Argon (Z=18)
  36Ar   37Ar   38Ar   39Ar   40Ar   41Ar   42Ar
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
36Ar 37Ar




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.08.3 ± 2.1*--
0.09.0 ± 1.5*--

(Version 0.0 corresponds to Bao et al.)
Comment
No experimental data. New rec. value is theoretical prediction from TENDL-2015 assuming 25% uncertainty.
Last review: April 2016
List of all available values
originalrenorm.yeartypeCommentRef
8.3
2015tTENDL-2015 using the TALYS codetendl15
8.86
2011eENDF/B-VII.1endfb71
8.86
2004eJEFF-3.1jeff31
8
1983eGrK83
24.6
2005tMOST 2005Gor05
40.6
2002tMOST 2002Gor02
14.6
2000tNON-SMOKERRaT99
6.7
1978tWFH78


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:
tTheoretical value
eEvaluated value taken directly from the reference
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
44.5
-
22.6
15.4
11.9
9.7
8.3 ± 2.1
6.5
5.4
4.8
4.0
3.6
Xfactor1.001.001.001.001.001.001.001.001.001.001.001.00
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
2.67
-
1.92
1.60
1.43
1.30
1.22
1.10
1.02
1.00
0.96
0.97

MACS:
Reference: tendl15
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: 2016

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF
Chart of nuclei
up
left
36Ca
102.00 ms
β+
37Ca
181.00 ms
β+
38Ca
440.00 ms
β+
39Ca
860.00 ms
β+
40Ca
96.94
6.7 mb
35K
178.00 ms
β+
36K
342.00 ms
β+
37K
1.23 s
β+
38K
7.64 m
β+
39K
93.2581
11.8 mb
34Ar
845.00 ms
β+
35Ar
1.77 s
β+
36Ar
0.3365
9 mb
37Ar
34.95 d
β+
38Ar
0.0632
3 mb
33Cl
2.51 s
β+
34Cl
1.53 s
β+
35Cl
75.77
10 mb
36Cl
301.01 ka
12 mb, β-
37Cl
24.23
2.15 mb
32S
95.02
4.1 mb
33S
0.75
7.4 mb
34S
4.21
0.226 mb
35S
87.51 d
β-
36S
0.02
0.171 mb
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Style: (S, M, L, XL or Alberto)


Isotope: Argon