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




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0266 ± 5--

(Version 0.0 corresponds to Bao et al.)
Comment
Last review: 1999
List of all available values
originalrenorm.yeartypeCommentRef
265.7 ± 5.1
1990cVdG, TOF, Au:RaK88,Mac82eWVK90
267 ± 13
2551982cVdG, TOF, Au:B-VRFW82
260 ± 17
1980bLinac, TOF, 10B:B-IVYSE80
304 ± 17
1978cF.N.B., Act.,1/v(E), 10B, Ag:Sat.YDM78
310 ± 16
1976c,1Linac, TOF, 6Li, Au:Sat., k=1.0737Mac76a
255
1997eMug97
285 ± 30
1971eAGM71
266.1
2006eendfb7
266.1
2004ejeff31
262.1
2002ejendl33
338
2000tRaT99
180-220
1990tKoU90
512
1981tHar81
415
1976tHWF76
261
2002tMOST 2002Gor02
241
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:
cDirectly quoted from the reference itself
bCalculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
1Including k from Ref. MaW81, where k is a correction factor which has been applied to the originally reported cross section
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
887
565
430
354
303
266 ± 5
216
184
161
130
110
SEF1.001.000.990.990.980.980.970.970.970.960.96
Rate
5.27
4.74
4.40
4.16
3.96
3.80
3.54
3.36
3.20
2.97
2.80

MACS:
Reference: WVK90
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: 1990

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
93Tc
2.75 h
β+
94Tc
4.88 h
β+
95Tc
20.00 h
β+
96Tc
4.28 d
β+
97Tc
4.21 Ma
β+
92Mo
14.84%
70 mb
93Mo
4.00 ka
β+
94Mo
9.25%
102 mb
95Mo
15.92%
292 mb
96Mo
16.68%
112 mb
91Nb
680.04 a
β+
92Nb
34.70 Ma
β+
93Nb
100%
266 mb
94Nb
20.30 ka
482 mb, β-
95Nb
34.99 d
310 mb, β-
90Zr
51.45%
19.4 mb
91Zr
11.22%
60 mb
92Zr
17.15%
33 mb
93Zr
1.53 Ma
95 mb, β-
94Zr
17.38%
26 mb
89Y
100%
19 mb
90Y
2.67 d
β-
91Y
58.51 d
β-
92Y
3.54 h
β-
93Y
10.18 h
β-
right
down
Style: (Size: S, M, L, XL, Alberto; No-Macs: nox)


Isotope: Niobium