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)
41Ar 42Ar




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.02.4 ± 0.6*--

(Version 0.0 corresponds to Bao et al.)
Comment
New dataset. No experimental data. New rec. value is from JEFF-3.0/A. Assuming 25% uncertainty. The TENDL predictions seem to high by one order of magnitude (similar behaviour seen in 39Ar). However, this recommended value is lower than its even-N neighbors, which is unusual. More investigation needed.
Last review: April 2016
List of all available values
originalrenorm.yeartypeCommentRef
25.7
2015tTENDL-2015 using the TALYS codetendl15
23.1
2014tJEFF-3.2 using TENDL-2012jeff32
2.39
2004tJEFF-3.0/Ajeff30A
6.7
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
4.5
-
4.2
3.5
3.1
2.7
2.4 ± 0.6
2.0
1.7
1.5
1.2
1.0
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
2.69
-
3.55
3.63
3.71
3.61
3.52
3.39
3.22
3.11
2.87
2.68

MACS:
Reference: jeff30A
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 105 cm3/mole/s, including SEF
Chart of nuclei
up
left
41Ca
102.01 ka
30 mb, β+
42Ca
0.647
15.6 mb
43Ca
0.135
51 mb
44Ca
2.09
9.4 mb
45Ca
162.62 d
17.5 mb, β-
40K
1.25x109 y
31 mb, β-
41K
6.7302
22 mb
42K
12.32 h
β-
43K
22.30 h
β-
44K
22.13 m
β-
39Ar
269.01 a
8 mb, β-
40Ar
99.6003
2.6 mb
41Ar
1.83 h
β-
42Ar
32.90 a
β-
43Ar
5.37 m
β-
38Cl
37.24 m
β-
39Cl
55.60 m
β-
40Cl
1.35 m
β-
41Cl
38.40 s
β-
42Cl
6.80 s
β-
37S
5.05 m
β-
38S
2.84 h
β-
39S
11.50 s
β-
40S
8.80 s
β-
41S
1.99 s
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Argon