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
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
180mTa 181Ta




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.21465 ± 100--
0.01640 ± 260*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: June 14th, 2005
List of all available values
originalrenorm.yeartypeCommentRef
1465 ± 100
2001cVdG, TOF, Au:RaK88Wis01a, Wis04a
2355
2000tRaT99
2662 ± 530
1992tNKR92
1800 ± 200
1982tBeM82
2273
1981tHar81
3270
1976tHWF76


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
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
 
 3059 
 2695 
 2143 
 1824 
 1613 
1465 ± 100
 1269 
 1145 
 1058 
 942 
 863 
SEF0.841.00.830.840.850.860.870.880.890.880.870.85
Rate-
2.29
1.88
1.85
1.84
1.85
1.86
1.88
1.90
1.92
1.95
1.95

MACS:
Reference: Wis04a
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: 2004

SEF (Stellar enhancement factor):
Reference: Rau09_tbp
Year: 2009
Comment: SEF for isomers are quite uncertain.

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
180Re
2.44 m
β+
181Re
19.90 h
β+
182Re
2.67 d
β+
183Re
70.00 d
β+
184Re
38.00 d
β+
179W
37.05 m
β+
180W
0.12
660 mb
181W
121.20 d
β+
182W
26.5
274 mb
183W
14.31
515 mb
178Ta
9.31 m
β+
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-
177Hf
18.6
1500 mb
178Hf
27.28
314 mb
179Hf
13.62
956 mb
180Hf
35.08
179 mb
181Hf
42.39 d
194 mb, β-
176Lu
37.61x109 y
1532 mb, β-
177Lu
6.65 d
β-
178Lu
28.40 m
β-
179Lu
4.59 h
β-
180Lu
5.70 m
β-
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Isotope: Tantalum
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