Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Hafnium (Z=72)
  174Hf   176Hf   177Hf   178Hf   179Hf   180Hf   181Hf   182Hf
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
181Hf 182Hf




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0194 ± 31*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
230
2000tRaT99
385
1976tHWF76
489
2002tMOST 2002Gor02
407
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
575
381
301
253
219
194 ± 31
158
134
116
93
78
SEF1.001.001.011.031.041.061.111.161.201.281.35
Rate
3.41
3.20
3.13
3.08
3.03
3.00
2.94
2.91
2.87
2.83
2.80

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 107 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
181W
121.20 d
β+
182W
26.5
274 mb
183W
14.31
515 mb
184W
30.64
223 mb
185W
75.10 d
703 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-
184Ta
8.70 h
β-
179Hf
13.62
956 mb
180Hf
35.08
179 mb
181Hf
42.39 d
194 mb, β-
182Hf
8.90 Ma
117 mb, β-
183Hf
1.07 h
β-
178Lu
28.40 m
β-
179Lu
4.59 h
β-
180Lu
5.70 m
β-
181Lu
3.50 m
β-
182Lu
2.00 m
β-
177Yb
1.91 h
β-
178Yb
1.23 h
β-
179Yb
8.00 m
β-
180Yb
2.40 m
β-
181Yb
1.00 m
β-
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Isotope: Hafnium
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