Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Tantalum (Z=73)
  179Ta   180mTa   181Ta   182Ta
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
181Ta 182Ta




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0766 ± 15--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
761 ± 38
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
788 ± 33
1991cVdG, Act., Au:RaK88,Mac82eTep91
766.2 ± 15.1
1990cVdG, TOF, Au:RaK88,Mac82eWVK90
828 ± 51
1990cVdG, Act., 1/v(kT), Au:655 (23)mb(24keV)XWY90
703 ± 35
1984cLinac, TOF, 6Li, Au:Sat.Mac84a
770 ± 38
1982cVdG, TOF, Au:B-VRFW82
834 ± 74
7771981cLinac, Act., Au:624 (23)mb(kT=30keV)ALL81
771 ± 48
1980bLinac, TOF, 10B:B-IVYSE80
960 ± 50
8941980cVdG, Act., 1/v(kT), Au:B-IVBeK80
787 ± 100
1978cF.N.B., Act., 1/v(E), 10B, Ag:Sat.YDM78
855 ± 86
7921977bVdG, TOF, 10B:Mag75, Au:628mb(kT=30keV)KYM77
1393 ± 153
23keV
10451973cSb-Be, Act., 1/v(E), 127I:836mb(23keV)SSR73
925 ± 140
8821972cVdG, TOF, In:740 (70)mbLDM72
850 ± 190
1970cLinac, TOF, 10B:BNL-325FLF70
719
1997eMug97
800 ± 80
1971eAGM71
793.4
2006eendfb7
752.8
2004ejeff31
752.8
2002ejendl33
974
2000tRaT99
1098
1981tHar81
1160
1976tHWF76
1770
2002tMOST 2002Gor02
714
2005tMOST 2005Gor05


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
bCalculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
2765
1633
1221
1002
863
766 ± 15
639
557
500
423
374
SEF1.021.021.021.021.031.031.031.021.010.990.98
Rate
1.67
1.39
1.28
1.22
1.17
1.14
1.10
1.07
1.04
1.00
0.97

MACS:
Reference: WVK90,BKP92
Procedure: 'e' (The Maxwellian-averaged cross sections (MACS) from kT=5 keV to 100 keV are obtained from experimental data; the relative uncertainties are similar to those quoted for the 30 keV data.)
Year: 1992

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

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
181Re
19.90 h
β+
182Re
2.67 d
β+
183Re
70.00 d
β+
184Re
38.00 d
β+
185Re
37.4
1535 mb
180W
0.12
660 mb
181W
121.20 d
β+
182W
26.5
274 mb
183W
14.31
515 mb
184W
30.64
223 mb
179Ta
1.82 a
1334 mb, β+
180Ta
8.15 h
1640 mb, β+
181Ta
99.988
766 mb
182Ta
114.43 d
1120 mb, β-
183Ta
5.10 d
β-
178Hf
27.28
314 mb
179Hf
13.62
956 mb
180Hf
35.08
179 mb
181Hf
42.39 d
194 mb, β-
182Hf
8.90 Ma
117 mb, β-
177Lu
6.65 d
β-
178Lu
28.40 m
β-
179Lu
4.59 h
β-
180Lu
5.70 m
β-
181Lu
3.50 m
β-
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Isotope: Tantalum
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