Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Disclaimer]   [Contact]
p-process
Available isotopes for Silicon (Z=14)
  28Si   29Si   30Si
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
30Si 31Si




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.21.82 ± 0.33--
0.06.5 ± 0.6--

(Version 0.0 corresponds to Bao et al.)
Comment
Previous MACS vs. kT table multiplied by 0.28.
Last review: January 30th, 2006
List of all available values
originalrenorm.yeartypeCommentRef
1.82 ± 0.33
2003cLinac, TOF, Au: Sat.; DC component is 0.48 (30) mbGKD03
6.5 ± 0.6
1975rLinac, TOF, 6Li, Au:Sat. Recalcul. including data of MDH81BAM75b
1.9
1971eAGM71
4.43
2006eendfb7
5.75
2004ejeff31
5.75
2002ejendl33
2.0
2000tRaT99
1.5
1978tWFH78
7.99
2002tMOST 2002Gor02
7.64
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
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
 34.72
 12.04 
 6.16 
 3.64 
2.46 
1.82 ± 0.33
 1.06 
 0.73 
 0.53 
 0.36 
 0.27 
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
2.09
1.02
0.64
0.44
0.33
0.27
0.18
0.14
0.11
0.09
0.07

MACS:
Reference: BAM75b, GDK03
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: 1976,2003

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
30S
1.18 s
β+
31S
2.57 s
β+
32S
95.02
4.1 mb
33S
0.75
7.4 mb
34S
4.21
0.226 mb
29P
4.14 s
β+
30P
2.50 m
β+
31P
100
1.74 mb
32P
14.26 d
β-
33P
25.34 d
β-
28Si
92.23
2.9 mb
29Si
4.683
7.9 mb
30Si
3.087
6.5 mb
31Si
2.62 h
β-
32Si
132.02 a
β-
27Al
100
3.74 mb
28Al
2.24 m
β-
29Al
6.56 m
β-
30Al
3.60 s
β-
31Al
644.00 ms
β-
26Mg
11.01
0.126 mb
27Mg
9.46 m
β-
28Mg
20.91 h
β-
29Mg
1.30 s
β-
30Mg
335.00 ms
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Silicon
This page is not optimized for Microsoft Internet Explorer.