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)
176Hf 177Hf




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.2626 ± 11--
0.0455 ± 20--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: July 18th, 2005
List of all available values
originalrenorm.yeartypeCommentRef
625.5 ± 11.0
2004cVdG, TOF, Au:RaK88Wis04d
449 ± 27
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
458 ± 20
1984cLinac, TOF, 6Li, Au:Sat.BWM84
730 ± 110
6761973cVdG, TOF, 10B:Mag75,SPU71, Au:628mb(kT=30keV)SGK73
640 ± 160
1971eAGM71
458.0
2006eendfb7
454.5
2004ejeff31
454.7
2002ejendl33
540
2000tRaT99
732
1981tHar81
755
1976tHWF76
759
2002tMOST 2002Gor02
511
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
 
 1263 
 1111 
 892
 769 
686 
626 ± 11
 539 
 480 
 471 
 380 
 343 
SEF1.001.01.001.001.031.061.101.181.251.301.411.50
Rate-
9.47
9.32
9.21
9.36
9.64
10.01
10.66
11.22
12.63
12.68
13.63

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
176W
2.50 h
β+
177W
2.20 h
β+
178W
21.60 d
β+
179W
37.05 m
β+
180W
0.12
660 mb
175Ta
10.50 h
β+
176Ta
8.09 h
β+
177Ta
2.36 d
β+
178Ta
9.31 m
β+
179Ta
1.82 a
1334 mb, β+
174Hf
0.16
956 mb
175Hf
70.00 d
β+
176Hf
5.26
455 mb
177Hf
18.6
1500 mb
178Hf
27.28
314 mb
173Lu
1.37 a
β+
174Lu
3.31 a
β+
175Lu
97.41
1146 mb
176Lu
37.61x109 y
1532 mb, β-
177Lu
6.65 d
β-
172Yb
21.83
341 mb
173Yb
16.13
754 mb
174Yb
31.83
151 mb
175Yb
4.18 d
558 mb, β-
176Yb
12.76
115.8 mb
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Isotope: Hafnium
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