Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Contact]
p-process
Available isotopes for Argon (Z=18)
  36Ar   38Ar   39Ar   40Ar
Go to isotope
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]
0.09.0 ± 1.5*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
8
1983eGrK83
8.86
2006eendfb7
8.86
2004ejeff31
14
2000tRaT99
6.7
1978tWFH78
40.6
2002tMOST 2002Gor02
24.6
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:
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
23.7
17.2
13.8
11.6
10.1
9.0 ± 1.5
7.5
6.5
5.8
4.9
4.3
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
1.42
1.46
1.43
1.39
1.35
1.32
1.27
1.23
1.20
1.17
1.15

MACS:
Reference:
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: 2000

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
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
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Argon