Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Selenium (Z=34)
  74Se   75Se   76Se   77Se   78Se   79Se   80Se   82Se
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
75Se 76Se




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0987 ± 247*--

(Version 0.0 corresponds to Bao et al.)
Comment
No exp. data available. New rec. value is from tendl15. Assuming 25% uncertainty. To be checked- the value seems much too high.
Last review: June 2016
List of all available values
originalrenorm.yeartypeCommentRef
987
2015tTENDL-2015 using the TALYS codetendl15
163
2004tJEFF-3.0/Ajeff30A
578
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
2716
-
1778
1416
1215
1083
987 ± 247
854
762
692
589
515
SEF1.001.001.001.001.000.990.990.960.930.910.870.85
Rate
1.62
-
1.50
1.46
1.44
1.43
1.42
1.38
1.34
1.30
1.22
1.16

MACS:
Reference: tendl15
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:

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Chart of nuclei
up
left
75Kr
4.29 m
β+
76Kr
14.80 h
β+
77Kr
1.24 h
β+
78Kr
0.35
321 mb
79Kr
1.46 d
959 mb, β+
74Br
25.40 m
β+
75Br
1.61 h
β+
76Br
16.20 h
β+
77Br
2.38 d
β+
78Br
6.46 m
β+
73Se
7.15 h
β+
74Se
0.89
267 mb
75Se
119.78 d
β+
76Se
9.37
164 mb
77Se
7.63
418 mb
72As
1.08 d
β+
73As
80.30 d
β+
74As
17.77 d
β+
75As
100
362 mb
76As
1.09 d
β-
71Ge
11.43 d
β+
72Ge
27.31
73 mb
73Ge
7.76
243 mb
74Ge
36.73
37.6 mb
75Ge
1.38 h
β-
right
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Style: (S, M, L, XL or Alberto)


Isotope: Selenium