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)
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]
1.0277 ± 69*--
0.0263 ± 46*--

(Version 0.0 corresponds to Bao et al.)
Comment
No direct experimental value available, the rec. value is the theoretical prediction from tendl15 with a 25% uncertainty. There is a range of values from the Se-80(gamma,n) cross section deduced with theoretical models (MUG09) which fit this value.
Last review: June 2016
List of all available values
originalrenorm.yeartypeCommentRef
83-380
2009c+tLaser Compton Scattering, Photoact.; from Se-80(gamma,n) with different Hauser-Feshbach modelsMUG09
276.6
2015tTENDL-2015 using the TALYS codetendl15
424.6
2014tJEFF-3.2 using calculations from TENDL-2012jeff32
415.8
2011tENDF/B-VII.1endfb71
505
2011tJENDL-4.0jendl40
415.8
2004tJEFF-3.1jeff31
415.8
2002tJENDL-3.3jendl33
415
2005tMOST 2005Gor05
572
2002tMOST 2002Gor02
223
2000tNON-SMOKERRaT99
218 ± 50
1982tRef82
514
1981tHar81
260
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
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
783
-
526
417
352
309
277 ± 69
232
202
179
147
125
Xfactor1.001.001.001.001.000.990.980.960.930.900.840.78
SEF1.001.001.001.001.001.000.990.970.950.920.880.85
Rate
4.66
-
4.43
4.30
4.19
4.10
4.00
3.79
3.60
3.40
3.08
2.82

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:
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
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
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Style: (S, M, L, XL or Alberto)


Isotope: Selenium