Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
[Standards]   [Logbook]   [FAQ]   [Links]   [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)
177Hf 178Hf




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.01653 ± 21--
0.21544 ± 12--
0.01500 ± 100--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value and MACS vs. kT table is from WVK06b. Value at kT= 5 keV extrapolated from normalized value of jendl40 (f(norm)= 1.066). Isomeric ratio at E(n)= 75(25) keV is IR= 0.08 (1) WVK06b.
Last review: In process
List of all available values
originalrenorm.yeartypeCommentRef
1544 ± 12
1653 ± 212004dVdG, TOF, Au:RaK88Wis04d,WVK06b
1652 ± 87
E(n)= 30 (2) keV
1992cVdG, TOF, Au+Ag+Nd+etc.:Sat.BKP92
1366 ± 61
1984cLinac, TOF, 6Li, Au:Sat.BWM84
1393
2011eENDF/B-VII.1endfb71
1517
2011eJENDL-4.0jendl40
1384
2006eENDF/B-VII.0endfb7
1392
2004eJEFF-3.1jeff31
1392
2002eJENDL-3.3jendl33
1500
1976equoted from BKW82DSM76
110
1971sAGM71
1164
2005tMOST 2005Gor05
1344
2002tMOST 2002Gor02
1364
2000tNON-SMOKERRaT99
2115
1981tHar81
1950
1976tHWF76


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:
dRenormalized 2017 based on updated Au measurement
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
4885 ± 325
3579 ± 147
3107 ± 101
2432 ± 53
2062 ± 35
1823 ± 27
1653 ± 23
1422 ± 18
1269 ± 16
1158 ± 17
1003 ± 21
896 ± 25
Xfactor1.001.001.001.001.000.990.970.930.880.830.720.63
SEF1.001.001.001.001.001.001.001.000.990.990.970.95
Rate
2.90
2.68
2.61
2.50
2.45
2.41
2.40
2.38
2.36
2.35
2.31
2.27

MACS:
Reference: Rei18
Procedure: 'd' (Renormalized 2017 based on updated Au measurement)
Year: 2018

X-factor:
Reference: Rau12
Year: 2012

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
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-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Hafnium