Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Niobium (Z=41)
  93Nb   94Nb   95Nb
Go to isotope
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
94Nb 95Nb




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0482 ± 92*--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
652
2000tRaT99
1253
1981tHar81
534
1976tHWF76
405
2002tMOST 2002Gor02
377
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:
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
925
773
677
598
534
482 ± 92
403
346
303
245
207
SEF1.001.000.990.980.960.940.910.880.860.850.85
Rate
5.50
6.50
6.94
6.98
6.83
6.61
6.14
5.73
5.40
4.96
4.66

MACS:
Reference:
Procedure: 't' (The MACS from kT=5 keV to 100 keV are obtained from theoretical calculations with corresponding uncertainties between 25 and 50% in most cases.)
Year: 2000

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
94Tc
4.88 h
β+
95Tc
20.00 h
β+
96Tc
4.28 d
β+
97Tc
4.21 Ma
β+
98Tc
4.20 Ma
β-
93Mo
4.00 ka
β+
94Mo
9.25%
102 mb
95Mo
15.92%
292 mb
96Mo
16.68%
112 mb
97Mo
9.55%
339 mb
92Nb
34.70 Ma
β+
93Nb
100%
266 mb
94Nb
20.30 ka
482 mb, β-
95Nb
34.99 d
310 mb, β-
96Nb
23.35 h
β-
91Zr
11.22%
60 mb
92Zr
17.15%
33 mb
93Zr
1.53 Ma
95 mb, β-
94Zr
17.38%
26 mb
95Zr
64.03 d
79 mb, β-
90Y
2.67 d
β-
91Y
58.51 d
β-
92Y
3.54 h
β-
93Y
10.18 h
β-
94Y
18.70 m
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Niobium