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)
80Se 81Se




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.042 ± 3--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
44 ± 3
421986cVdG, TOF, Au:B-VWBK86b
39.41
2006eendfb7
67.16
2004ejeff31
39.41
2002ejendl33
40
2000tRaT99
20 ± 12
1971eAGM71
34
1981tHar81
41
1978tWFH78
55.9
2002tMOST 2002Gor02
50.7
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
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
116
79
62
54
47
42 ± 3
36
32
29
25
22
SEF1.001.001.001.001.001.001.001.001.001.001.00
Rate
6.90
6.65
6.39
6.43
6.25
6.12
6.06
6.02
5.98
5.95
5.85

MACS:
Reference: WBK86b
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: 1986

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
80Kr
2.28%
267 mb
81Kr
229.02 ka
607 mb, β+
82Kr
11.58%
90 mb
83Kr
11.49%
243 mb
84Kr
57%
38 mb
79Br
50.69%
622 mb
80Br
17.68 m
β-
81Br
49.31%
239 mb
82Br
1.47 d
β-
83Br
2.40 h
β-
78Se
23.77%
109 mb
79Se
294.99 ka
263 mb, β-
80Se
49.61%
42 mb
81Se
18.45 m
β-
82Se
8.73%
9 mb
77As
1.62 d
β-
78As
1.51 h
β-
79As
9.01 m
β-
80As
15.20 s
β-
81As
33.30 s
β-
76Ge
7.83%
21.5 mb
77Ge
11.30 h
β-
78Ge
1.47 h
β-
79Ge
18.98 s
β-
80Ge
29.50 s
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Selenium