Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [Disclaimer]   [Contact]
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)
179Hf 180Hf




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.2922 ± 8-11.4 ± 0.6
0.0956 ± 50-11.4 ± 0.6

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: July 18th, 2005
List of all available values
originalrenorm.yeartypeCommentRef
922.4 ± 8.4
2004cVdG, TOF, Au:RaK88Wis04d
858 ± 43
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
991 ± 30
1982cLinac, TOF, 6Li, Au:Sat.BeM82
1346
1976equoted from BKW82DSM76
960
1971sAGM71
978.6
2006eendfb7
981.6
2004ejeff31
982.1
2002ejendl33
1157
2000tRaT99
1368
1981tHar81
977
1976tHWF76
1107
2002tMOST 2002Gor02
838
2005tMOST 2005Gor05
Partial cross section to 180mHf:
12.2 ± 0.6
11.41980cVdG, Act., 1/v(kT), Au:B-IVBeW81


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
 
 2020 
 1753 
 1365 
 1154 
 1018 
922 ± 8
 793 
 706 
 642 
 550 
 485 
SEF1.001.01.001.001.001.000.990.980.970.960.940.91
Rate-
1.52
1.47
1.40
1.37
1.35
1.33
1.31
1.29
1.27
1.22
1.18

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
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Hafnium
This page is not optimized for Microsoft Internet Explorer.