Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Contact]
p-process
Available isotopes for Bromine (Z=35)
  79Br   80Br   81Br   82Br
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
81Br 82Br




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0248 ± 10--
0.3239 ± 7--
0.0313 ± 16--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. cross section is weighted average of HKU08b (normalized by 632/586= 1.0785) and Mac88a. Uncertainty is 4% plus deviation between normalized energy dependence of endfb71 and tendl15. MACS vs. kT table from normalized energy dependencies of endfb71 and tendl15.
Last review: December 2016
List of all available values
originalrenorm.yeartypeCommentRef
235 ± 9
253 ± 102008cVdG, Act., Au:RaK88 corrected by 632/586= 1.0785HKU08b
244 ± 10
1988cLinac, TOF, 6Li, Au:Sat.Mac88a
317 ± 16
330 ± 171986cVdG, Act., 1/v(kT), Au: renorm. by 683 mb/657 mb= 1.04 (kT= 25 keV)WBK86b
234.6
2015eTENDL-2015 using the TALYS codetendl15
225.1
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
229.1
2011eENDF/B-VII.1endfb71
285.1
2011eJENDL-4.0jendl40
453.1
2004eJEFF-3.1jeff31
247.1
2002eJENDL-3.3jendl33
460 ± 80
1971eAGM71
218
2005tMOST 2005Gor05
243
2002tMOST 2002Gor02
278
2000tNON-SMOKERRaT99
596
1981tHar81
460
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
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
715 ± 35
-
447 ± 27
357 ± 21
307 ± 16
273 ± 13
248 ± 10
212 ± 10
188 ± 10
170 ± 10
145 ± 9
127 ± 8
Xfactor1.001.001.001.001.001.001.001.001.000.990.960.92
SEF1.001.001.001.001.001.001.001.001.001.000.990.98
Rate
4.25
-
3.76
3.68
3.65
3.63
3.61
3.57
3.53
3.49
3.41
3.30

MACS:
Reference: Mac88a,HKU08b,endfb71,tendl15
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: 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
81Rb
4.57 h
β+
82Rb
1.27 m
β+
83Rb
86.20 d
β+
84Rb
33.10 d
β+
85Rb
72.17
234 mb
80Kr
2.28
267 mb
81Kr
229.02 ka
607 mb, β+
82Kr
11.58
90 mb
83Kr
11.49
243 mb
84Kr
57
38 mb
79Br
50.69
622 mb
80Br
17.68 m
β-
81Br
49.31
239 mb
82Br
1.47 d
β-
83Br
2.40 h
β-
78Se
23.77
109 mb
79Se
294.99 ka
263 mb, β-
80Se
49.61
42 mb
81Se
18.45 m
β-
82Se
8.73
9 mb
77As
1.62 d
β-
78As
1.51 h
β-
79As
9.01 m
β-
80As
15.20 s
β-
81As
33.30 s
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Bromine