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)
180Hf 181Hf




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.2157 ± 2--
0.0179 ± 5--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: July 18th, 2005
List of all available values
originalrenorm.yeartypeCommentRef
156.5 ± 1.9
2004cVdG, TOF, Au:RaK88Wis04d
169 ± 14
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
179 ± 5
1982cLinac, TOF, 6Li, Au:Sat.BeM82
180 ± 9
1681982cVdG, Act., 1/v(kT), Au:B-IVBKW82
316 ± 41
23keV
2371973cSb-Be, Act., 1/v(E), 127I:836mb(23keV)SSR73
290 ± 80
1971eAGM71
174.4
2006eendfb7
233.7
2004ejeff31
233.8
2002ejendl33
205
2000tRaT99
245
1981tHar81
384
1976tHWF76
279
2002tMOST 2002Gor02
224
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
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
  
 293 
 263 
 218 
 191 
 172 
157 ± 2
 134 
 118 
 105 
 88 
 76 
SEF1.001.01.001.011.031.051.091.161.231.291.411.53
Rate-
2.20
2.21
2.25
2.32
2.41
2.49
2.61
2.71
2.78
2.94
3.08

MACS:
Reference: Wis04d
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
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
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-
176Yb
12.76
115.8 mb
177Yb
1.91 h
β-
178Yb
1.23 h
β-
179Yb
8.00 m
β-
180Yb
2.40 m
β-
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Isotope: Hafnium
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