Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Selenium (Z=34)
  74Se   76Se   77Se   78Se   79Se   80Se   82Se
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
82Se 83Se




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 ± 8*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
36 ± 15
1971eAGM71
31.17
2006eendfb7
13.82
2004ejeff31
30.34
2002ejendl33
19
2000tRaT99
19 ± 6
1988tZZC88
6.1
1981tHar81
16
1978tWFH78
12.9
2002tMOST 2002Gor02
12.1
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
25
18
14
12
10
9 ± 8
8
7
6
5
5
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
1.49
1.51
1.44
1.43
1.33
1.31
1.35
1.32
1.24
1.19
1.33

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
82Kr
11.58%
90 mb
83Kr
11.49%
243 mb
84Kr
57%
38 mb
85Kr
10.72 a
55 mb, β-
86Kr
17.3%
3.4 mb
81Br
49.31%
239 mb
82Br
1.47 d
β-
83Br
2.40 h
β-
84Br
31.80 m
β-
85Br
2.90 m
β-
80Se
49.61%
42 mb
81Se
18.45 m
β-
82Se
8.73%
9 mb
83Se
22.30 m
β-
84Se
3.10 m
β-
79As
9.01 m
β-
80As
15.20 s
β-
81As
33.30 s
β-
82As
19.10 s
β-
83As
13.40 s
β-
78Ge
1.47 h
β-
79Ge
18.98 s
β-
80Ge
29.50 s
β-
81Ge
7.60 s
β-
82Ge
4.55 s
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Selenium