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)
79Br 80Br




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0661 ± 44-181 ± 18
0.3622 ± 34-171 ± 17
0.0627 ± 42-78 ± 8

(Version 0.0 corresponds to Bao et al.)
Comment
New recomm. value is from WBK86b (normalized by 683/657= 1.04) and HKU08b (normalized by by 632/586= 1.0785) to correct for new 197Au cross sections. MACS vs. kT table from energy dependencies of jeff32 which fits the data perfectly, and normalized energy dependencies of endfb71 and jendl40. Additional uncertainties for MACS vs. kT tables from differences between evaluations. Recomm. partial cross section to isomer is deduced from isomeric ratio IR=0.274 HKU08b.
Last review: December 2016
List of all available values
originalrenorm.yeartypeCommentRef
613 ± 59
661 ± 642008cVdG, Act., Au:RaK88 corrected by 632/586= 1.0785HKU08b
741 ± 30
1988cLinac, TOF, 6Li, Au:Sat.Mac88a
636 ± 42
661 ± 441986cVdG, Act., 1/v(kT), Au: renorm. by 683 mb/657 mb= 1.04 (kT= 25 keV)WBK86b
636.3
2015eTENDL-2015 using the TALYS codetendl15
660.7
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
687.8
2011eENDF/B-VII.1endfb71
700.2
2011eJENDL-4.0jendl40
731.6
2004eJEFF-3.1jeff31
687.8
2002eJENDL-3.3jendl33
600 ± 150
1971eAGM71
421
2005tMOST 2005Gor05
434
2002tMOST 2002Gor02
436
2000tNON-SMOKERRaT99
749
1981tHar81
520
1978tWFH78
Partial cross section to 80mBr:
174 ± 17
168 ± 162008cVdG, Act., Au:RaK88HKU08b
79 ± 8
781984cVdG, Act., 1/v(kT), Au:657mb(25keV)Wal84


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
1890 ± 181
-
1223 ± 105
966 ± 74
823 ± 58
729 ± 49
661 ± 44
567 ± 38
503 ± 35
454 ± 33
383 ± 30
332 ± 27
Xfactor1.001.001.001.001.001.001.000.980.940.890.760.64
SEF1.001.001.001.001.001.001.001.000.990.990.970.95
Rate
1.12
-
1.03
1.00
0.98
0.97
0.96
0.95
0.94
0.92
0.88
0.84

MACS:
Reference: WBK86b,HKU08b,jeff32,endfb71,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: 2016

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Chart of nuclei
up
left
79Rb
22.90 m
β+
80Rb
33.40 s
β+
81Rb
4.57 h
β+
82Rb
1.27 m
β+
83Rb
86.20 d
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+
82Kr
11.58
90 mb
77Br
2.38 d
β+
78Br
6.46 m
β+
79Br
50.69
622 mb
80Br
17.68 m
β-
81Br
49.31
239 mb
76Se
9.37
164 mb
77Se
7.63
418 mb
78Se
23.77
109 mb
79Se
294.99 ka
263 mb, β-
80Se
49.61
42 mb
75As
100
362 mb
76As
1.09 d
β-
77As
1.62 d
β-
78As
1.51 h
β-
79As
9.01 m
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Bromine