Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Holmium (Z=67)
  163Ho   165Ho   166Ho   166mHo
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
163Ho 164Ho




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.02118 ± 98-432 ± 23
0.02125 ± 95--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is data from JaK96b, recalculated with a) the energy-dependence of RUSFOND-2010 (rus10) normalized by f= 1.37 and b) assuming as described in JaK96b the same energy-trend for Au-197 and Ho-163.
The ratio between the spectrum-averaged cross sections (SACSs) of Au-197 and the MACS at kT= 30 keV is r(MACS/SACS)= 0.993. This factor is multiplied with the SACS of Ho-163 to get MACS30= 2125 mb. For the energy-dependence the NON-SMOKER dependence (RaT99) is then normalized by f=1.024. The recommended value is the average from the normalized ROSFOND-data and the recalculated data from JaK96b, the uncertainty is 4.2% plus the deviation between the normalized ROSFOND and NON-SMOKER data. The isomeric ratio (m/total) is IR= 0.204 at kT= 30 keV.
Last review: October 2013
List of all available values
originalrenorm.yeartypeCommentRef
2110 ± 89
1996cVdG, Act., 1/v(kT), Au:RaK88; using energy-dep. from rus10JaK96b
2125 ± 95
1996cVdG, Act., 1/v(kT), Au:RaK88; assuming same energy dep. as 197AuJaK96b
1545
2010eRUSFOND-2010rus10
2156
2005tMOST 2005Gor05
2513
2002tMOST 2002Gor02
1967
2000tNON-SMOKERRaT99
2264
1981tHar81
2880
1976tHWF76
Partial cross section to 164mHo:
433.5 ± 22.9
1996cVdG, Act., 1/v(kT), Au:RaK88; assuming same energy dep. as 197AuJaK96b


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
5609 ± 317
-
3541 ± 278
2910 ± 170
2548 ± 121
2301 ± 99
2118 ± 98
1857 ± 92
1677 ± 89
1543 ± 86
1352 ± 83
1219 ± 80
Xfactor1.001.001.001.000.990.980.960.910.850.790.680.58
SEF1.001.001.001.001.001.001.000.990.990.990.970.95
Rate
3.33
-
2.97
2.99
3.02
3.05
3.07
3.10
3.11
3.13
3.12
3.08

MACS:
Reference: JaK96b,RaT99,rus10
Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.)
Year: 2013

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
163Tm
1.81 h
β+
164Tm
2.00 m
β+
165Tm
1.25 d
β+
166Tm
7.70 h
β+
167Tm
9.25 d
β+
162Er
0.139
1624 mb
163Er
1.25 h
β+
164Er
1.601
1084 mb
165Er
10.36 h
β+
166Er
33.503
563 mb
161Ho
2.48 h
β+
162Ho
15.00 m
β+
163Ho
4.57 ka
2125 mb, β+
164Ho
29.00 m
β+
165Ho
100
1280 mb
160Dy
2.34
890 mb
161Dy
18.91
1964 mb
162Dy
25.51
446 mb
163Dy
24.9
1112 mb
164Dy
28.18
212 mb
159Tb
100
1580 mb
160Tb
72.30 d
3240 mb, β-
161Tb
6.91 d
β-
162Tb
7.60 m
β-
163Tb
19.50 m
β-
right
down
Style: (S, M, L, XL or Alberto)


Isotope: Holmium