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)
82Se 83Se




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.08.4 ± 0.52.0 ± 0.2-
0.09 ± 8*--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is taken from recent evaluation jendl40 which fits measurement of IKK11. No values shown for Se-82 in the paper, only available as private communication to EXFOR. MACS vs. kT table used from jendl40. Uncertainty of 6.2% from IKK11. This value is lower than the unpublished result of ID13b. Isomeric ratio at kT= 30 keV is IR= 1-0.238= 0.762.
Last review: June 2016
List of all available values
originalrenorm.yeartypeCommentRef
15.5-4.6
E(n)= 15-544 keV
2010cPelletron, TOF, Au:ENDF/B-VI and MaG67bIKK11
11.4
25 keV
10.9 ± 1.12013uVdG, Act., Au:RaK88 corrected by 632/586= 1.0785; energy dep. from jendl40; unpublishedID13b
4.1
2015eTENDL-2015 using the TALYS codetendl15
5.1
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
31.2
2011eENDF/B-VII.1endfb71
8.4
2011eJENDL-4.0jendl40
13.82
2004eJEFF-3.1jeff31
30.34
2002eJENDL-3.3jendl33
36 ± 15
1971eAGM71
12.1
2005tMOST 2005Gor05
12.9
2002tMOST 2002Gor02
18.6
2000tNON-SMOKERRaT99
19 ± 6
1988tZZC88
6.1
1981tHar81
16
1978tWFH78
Partial cross section to 83mSe:
45 ± 15
E(n)= 24 (5) keV
45.71966cSb-Be, Act., 1/v(E),127I:820mb(24keV)ChS66
Partial cross section to 83gSe:
2.1
25 keV
2.0 ± 0.22013uVdG, Act., Au:RaK88 corrected by 632/586= 1.0785; energy dep. from jendl40; unpublishedID13b


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
uUnpublished value
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
21.9
-
13.1
11.0
9.9
9.0
8.4 ± 0.5
7.4
6.7
6.2
5.5
5.1
Xfactor1.001.001.001.001.001.001.001.001.001.001.000.99
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
1.30
-
1.10
1.13
1.18
1.20
1.22
1.25
1.26
1.28
1.31
1.36

MACS:
Reference: jendl40
Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.)
Year: 2011

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF
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: (S, M, L, XL or Alberto)


Isotope: Selenium