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
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
79Se 80Se




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0263 ± 46*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
233
2000tRaT99
218 ± 50
1982tRef82
514
1981tHar81
260
1978tWFH78
572
2002tMOST 2002Gor02
415
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:
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
741
496
394
334
293
263 ± 46
220
191
169
138
117
SEF1.001.001.001.001.000.990.970.950.920.880.85
Rate
4.41
4.17
4.06
3.97
3.88
3.80
3.59
3.40
3.21
2.89
2.64

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 107 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
79Kr
1.46 d
959 mb, β+
80Kr
2.28%
267 mb
81Kr
229.02 ka
607 mb, β+
82Kr
11.58%
90 mb
83Kr
11.49%
243 mb
78Br
6.46 m
β+
79Br
50.69%
622 mb
80Br
17.68 m
β-
81Br
49.31%
239 mb
82Br
1.47 d
β-
77Se
7.63%
418 mb
78Se
23.77%
109 mb
79Se
294.99 ka
263 mb, β-
80Se
49.61%
42 mb
81Se
18.45 m
β-
76As
1.09 d
β-
77As
1.62 d
β-
78As
1.51 h
β-
79As
9.01 m
β-
80As
15.20 s
β-
75Ge
1.38 h
β-
76Ge
7.83%
21.5 mb
77Ge
11.30 h
β-
78Ge
1.47 h
β-
79Ge
18.98 s
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Selenium