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)
179Ta 180Ta




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.01334 ± 422*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
1563
2000tRaT99
1128 ± 225
1992tNKR92
1277
2002tMOST 2002Gor02
1187
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:
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
2854
1938
1709
1551
1430
1334 ± 422
1190
1087
1007
890
805
SEF1.001.011.011.011.011.011.001.000.990.970.96
Rate
1.69
1.63
1.77
1.85
1.91
1.95
2.00
2.03
2.04
2.06
2.05

MACS:
Reference:
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: 2000

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
179Re
19.50 m
β+
180Re
2.44 m
β+
181Re
19.90 h
β+
182Re
2.67 d
β+
183Re
70.00 d
β+
178W
21.60 d
β+
179W
37.05 m
β+
180W
0.12
660 mb
181W
121.20 d
β+
182W
26.5
274 mb
177Ta
2.36 d
β+
178Ta
9.31 m
β+
179Ta
1.82 a
1334 mb, β+
180Ta
8.15 h
1640 mb, β+
181Ta
99.988
766 mb
176Hf
5.26
455 mb
177Hf
18.6
1500 mb
178Hf
27.28
314 mb
179Hf
13.62
956 mb
180Hf
35.08
179 mb
175Lu
97.41
1146 mb
176Lu
37.61x109 y
1532 mb, β-
177Lu
6.65 d
β-
178Lu
28.40 m
β-
179Lu
4.59 h
β-
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Isotope: Tantalum
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