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)
77Se 78Se




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0503 ± 20--
0.0418 ± 71*--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is from recent evaluation (jendl40) which fits data from KIK10. Uncertainty of 3.9% from KIK10.
Last review: June 2016
List of all available values
originalrenorm.yeartypeCommentRef
619-44
E(n)= 21-510 keV
2010cPelletron, TOF, Au:ENDF/B-VI and MaG67bKIK10
455.4
2015eTENDL-2015 using the TALYS codetendl15
464.9
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
446.2
2011eENDF/B-VII.1endfb71
503.7
2011eJENDL-4.0jendl40
439.7
2004eJEFF-3.1jeff31
446.2
2002eJENDL-3.3jendl33
340
1971sAGM71
475
2005tMOST 2005Gor05
279
2002tMOST 2002Gor02
307
2000tNON-SMOKERRaT99
553
1981tHar81
430
1978tWFH78


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
sSemiempirical estimates given in the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1399
-
949
751
636
558
503 ± 20
426
374
335
278
238
Xfactor1.001.001.001.001.000.990.970.870.740.610.430.32
SEF1.001.001.001.001.001.001.001.001.000.990.960.94
Rate
8.33
-
7.99
7.74
7.57
7.43
7.35
7.20
7.05
6.85
6.39
5.97

MACS:
Reference: KIK10,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 107 cm3/mole/s, including SEF
Chart of nuclei
up
left
77Kr
1.24 h
β+
78Kr
0.35
321 mb
79Kr
1.46 d
959 mb, β+
80Kr
2.28
267 mb
81Kr
229.02 ka
607 mb, β+
76Br
16.20 h
β+
77Br
2.38 d
β+
78Br
6.46 m
β+
79Br
50.69
622 mb
80Br
17.68 m
β-
75Se
119.78 d
β+
76Se
9.37
164 mb
77Se
7.63
418 mb
78Se
23.77
109 mb
79Se
294.99 ka
263 mb, β-
74As
17.77 d
β+
75As
100
362 mb
76As
1.09 d
β-
77As
1.62 d
β-
78As
1.51 h
β-
73Ge
7.76
243 mb
74Ge
36.73
37.6 mb
75Ge
1.38 h
β-
76Ge
7.83
21.5 mb
77Ge
11.30 h
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Selenium