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
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
37Ar 38Ar




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.010.2 ± 2.6*--

(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
10.2
2015tTENDL-2015 using the TALYS codetendl15
10.6
2000tNON-SMOKERRaT99


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
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
155.7
-
52.7
27.8
18.0
13.0
10.2 ± 2.6
7.1
5.5
4.6
3.5
2.9
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
9.33
-
4.47
2.89
2.16
1.74
1.50
1.20
1.04
0.95
0.84
0.78

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
37Ca
181.00 ms
β+
38Ca
440.00 ms
β+
39Ca
860.00 ms
β+
40Ca
96.94
6.7 mb
41Ca
102.01 ka
30 mb, β+
36K
342.00 ms
β+
37K
1.23 s
β+
38K
7.64 m
β+
39K
93.2581
11.8 mb
40K
1.25x109 y
31 mb, β-
35Ar
1.77 s
β+
36Ar
0.3365
9 mb
37Ar
34.95 d
β+
38Ar
0.0632
3 mb
39Ar
269.01 a
8 mb, β-
34Cl
1.53 s
β+
35Cl
75.77
10 mb
36Cl
301.01 ka
12 mb, β-
37Cl
24.23
2.15 mb
38Cl
37.24 m
β-
33S
0.75
7.4 mb
34S
4.21
0.226 mb
35S
87.51 d
β-
36S
0.02
0.171 mb
37S
5.05 m
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Argon