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)
76Se 77Se




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0168.0 ± 8.2--
0.0164 ± 8--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is taken from recent evaluation jendl40 which fits measurement of IKK11 and BWK92b. No values shown for Se-76 in the paper, only available as private communication to EXFOR. MACS vs. kT table used from jendl40. Uncertainty of 4.9% from BWK92b.
Last review: June 2016
List of all available values
originalrenorm.yeartypeCommentRef
197-56
E(n)= 20-545 keV
2011cPelletron, TOF, Au:ENDF/B-VI and MaG67bIKK11
164 ± 8
1992cVdG, TOF, Au:RaK88,Mac82eBWK92b
139.1
2015eTENDL-2015 using the TALYS codetendl15
140.5
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
96.0
2011eENDF/B-VII.1endfb71
168.0
2011eJENDL-4.0jendl40
155.3
2004eJEFF-3.1jeff31
95.98
2002eJENDL-3.3jendl33
100
1971sAGM71
126
2005tMOST 2005Gor05
133
2002tMOST 2002Gor02
119
2000tNON-SMOKERRaT99
146
1982tRef82
126
1981tHar81
83
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
360.9
-
273.1
230.3
202.3
182.6
168.0 ± 8.2
147.9
134.7
125.3
112.8
104.4
Xfactor1.001.001.001.001.001.001.001.001.001.000.990.98
SEF1.001.001.001.001.001.001.001.001.001.001.001.01
Rate
2.15
-
2.30
2.37
2.41
2.43
2.45
2.49
2.54
2.58
2.69
2.80

MACS:
Reference: BWK92b,IKK11,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
76Kr
14.80 h
β+
77Kr
1.24 h
β+
78Kr
0.35
321 mb
79Kr
1.46 d
959 mb, β+
80Kr
2.28
267 mb
75Br
1.61 h
β+
76Br
16.20 h
β+
77Br
2.38 d
β+
78Br
6.46 m
β+
79Br
50.69
622 mb
74Se
0.89
267 mb
75Se
119.78 d
β+
76Se
9.37
164 mb
77Se
7.63
418 mb
78Se
23.77
109 mb
73As
80.30 d
β+
74As
17.77 d
β+
75As
100
362 mb
76As
1.09 d
β-
77As
1.62 d
β-
72Ge
27.31
73 mb
73Ge
7.76
243 mb
74Ge
36.73
37.6 mb
75Ge
1.38 h
β-
76Ge
7.83
21.5 mb
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Isotope: Selenium