Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Niobium (Z=41)
  91Nb   92Nb   93Nb   94Nb   95Nb
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
95Nb 96Nb




Cross sections do not include stellar enhancement factors!
* only theoretical data available
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0463 ± 116*--
0.0310 ± 65*--

(Version 0.0 corresponds to Bao et al.)
Comment
No experimental value available, the rec. value is the average of the theoretical predictions from tendl15, endfb71,jendl40 with a 25% uncertainty.
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
513
2015tTENDL-2015 using the TALYS codetendl15
376
2005tJEFF-3.0/Ajeff30A
402
2006tENDF/B-VII.1endfb71
560
2011tJENDL-4.0jendl40
404
2004tJEFF-3.1jeff31
404
2002tJENDL-3.3jendl33
112
2005tMOST 2005Gor05
179
2002tMOST 2002Gor02
405
2000tNON-SMOKERRaT99


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
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
1324
-
899
710
596
519
463 ± 116
385
335
299
252
222
Xfactor1.001.001.001.001.001.001.001.001.001.000.990.98
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
7.87
-
7.56
7.31
7.09
6.90
6.74
6.47
6.30
6.16
5.99
5.90

MACS:
Reference: tendl15,endfb71,jendl40,jeff30A
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: 2017

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate NA<σv> given in 107 cm3/mole/s, including SEF
Chart of nuclei
up
left
95Tc
20.00 h
β+
96Tc
4.28 d
β+
97Tc
4.21 Ma
β+
98Tc
4.20 Ma
β-
99Tc
211.11 ka
781 mb, β-
94Mo
9.25
102 mb
95Mo
15.92
292 mb
96Mo
16.68
112 mb
97Mo
9.55
339 mb
98Mo
24.13
99 mb
93Nb
100
266 mb
94Nb
20.30 ka
482 mb, β-
95Nb
34.99 d
310 mb, β-
96Nb
23.35 h
β-
97Nb
1.20 h
β-
92Zr
17.15
33 mb
93Zr
1.53 Ma
95 mb, β-
94Zr
17.38
26 mb
95Zr
64.03 d
79 mb, β-
96Zr
2.8
10.7 mb
91Y
58.51 d
β-
92Y
3.54 h
β-
93Y
10.18 h
β-
94Y
18.70 m
β-
95Y
10.30 m
β-
right
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Style: (S, M, L, XL or Alberto)


Isotope: Niobium