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)
177Hf 178Hf




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.21544 ± 12--
0.01500 ± 100--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: July 18th, 2005
List of all available values
originalrenorm.yeartypeCommentRef
1544 ± 12
2004cVdG, TOF, Au:RaK88Wis04d
1663 ± 83
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
1366 ± 61
1984cLinac, TOF, 6Li, Au:Sat.BWM84
1500
1976equoted from BKW82DSM76
110
1971sAGM71
1384
2006eendfb7
1392
2004ejeff31
1392
2002ejendl33
1364
2000tRaT99
2115
1981tHar81
1950
1976tHWF76
1344
2002tMOST 2002Gor02
1164
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
sSemiempirical estimates given in the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
 
 3257 
 2849 
 2249 
 1916 
 1699 
1544 ± 12
1335 
 1199 
 1101 
 965 
 873 
SEF1.001.01.001.001.001.001.001.000.990.990.970.95
Rate-
2.44
2.39
2.31
2.27
2.25
2.24
2.23
2.23
2.23
2.23
2.21

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 108 cm3/mole/s, including SEF
Isotopic mass chain
Isotopic Mass Chain
Chart of nuclei
up
left
177W
2.20 h
β+
178W
21.60 d
β+
179W
37.05 m
β+
180W
0.12
660 mb
181W
121.20 d
β+
176Ta
8.09 h
β+
177Ta
2.36 d
β+
178Ta
9.31 m
β+
179Ta
1.82 a
1334 mb, β+
180Ta
8.15 h
1640 mb, β+
175Hf
70.00 d
β+
176Hf
5.26
455 mb
177Hf
18.6
1500 mb
178Hf
27.28
314 mb
179Hf
13.62
956 mb
174Lu
3.31 a
β+
175Lu
97.41
1146 mb
176Lu
37.61x109 y
1532 mb, β-
177Lu
6.65 d
β-
178Lu
28.40 m
β-
173Yb
16.13
754 mb
174Yb
31.83
151 mb
175Yb
4.18 d
558 mb, β-
176Yb
12.76
115.8 mb
177Yb
1.91 h
β-
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Isotope: Hafnium
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