41-Nb-99
Spin
Level energy(keV) Spin & Parity
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ground state 9/2+
3.65290E+02 1/2-
Mass (The Ame2012 atomic mass evaluation (II) by M.Wang, G.Audi, A.H.Wapstra, F.G.Kondev, M.MacCormick, X.Xu, and B.Pfeiffer
Chinese Physics C36 p. 1603-2014, December 2012)
98.911613177 ± 0.000012931 (amu) [mass excess = -82331.795 ± 12.046 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
3637.175 ± 12.049 (keV)
Strong Gamma-rays from Decay of Nb- 99 (Compiled from ENSDF as of March 2011)
[ Intensities before May 23th of 2013 were values when total intensity of the decay mode was 100(%) and a branching ratio of each decay mode was not multiplied. ]
γ-ray energy(keV) Intensity(%) Decay mode
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97.8 42.93 B-
137.7 81. B-
1622.2 2.03 B-
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365.1 ? 2.84 IT
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97.78 6.65 B-
253.5 3.7 B-
2641.3 3.69 B-
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*: relative, ~ approximate, ? calculated or estimatted
>: greater than or equal to, <: less than or equal to
[ Intensities; total intensity of the nuclide is 100(%). ]
Decay data(Chart of the Nuclides 2014)
Decay mode Half-life
B- 15.0 S 2
B- 2.6 M 2
IT 2.5 M 2
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Mo- 99 (Z= 42, A= 99), MT=103 (n,p)
Mo-100 (Z= 42, A=100), MT= 28 (n,np)
Mo-100 (Z= 42, A=100), MT=104 (n,d)
Fission Yields for Fission Products in JENDL-4.0 Fission Yield Data
- Neutron-induced Fission Yields (from main actinide nuclides) - Independent Fission Yield -
Product Nuclide Energy Fission Yield Uncertainty(1σ)
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Nb- 99 U-235 Thermal 3.539350e-03 3.893290e-04
Nb- 99 U-235 Fast 1.283360e-03 8.213490e-04
Nb- 99 U-235 High 7.288360e-03 4.664540e-03
Nb- 99 U-238 Fast 2.638420e-04 1.688590e-04
Nb- 99 U-238 High 1.492970e-03 9.554990e-04
Nb- 99 Pu-239 Thermal 7.764980e-03 1.242400e-03
Nb- 99 Pu-239 Fast 5.650540e-03 3.616350e-03
Nb- 99 Pu-239 High 1.087010e-02 6.956880e-03
Nb- 99 Pu-241 Thermal 1.942170e-03 1.242990e-03
Nb- 99 Pu-241 Fast 1.417730e-03 9.073450e-04
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Nb- 99m U-235 Thermal 8.194560e-04 6.555640e-05
Nb- 99m U-235 Fast 2.591400e-04 1.658490e-04
Nb- 99m U-235 High 9.192530e-04 5.883210e-04
Nb- 99m U-238 Fast 5.327590e-05 3.409660e-05
Nb- 99m U-238 High 1.883030e-04 1.205130e-04
Nb- 99m Pu-239 Thermal 1.797800e-03 1.150590e-03
Nb- 99m Pu-239 Fast 1.140980e-03 7.302240e-04
Nb- 99m Pu-239 High 1.371010e-03 4.387240e-04
Nb- 99m Pu-241 Thermal 4.496650e-04 2.877850e-04
Nb- 99m Pu-241 Fast 2.862720e-04 1.832140e-04
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Thermal=0.0253eV, Fast=500keV(Fast reactor spectrum), High=14MeV
- Neutron-induced Fission Yields (from main actinide nuclides) - Cumulative Fission Yield -
Product Nuclide Energy Fission Yield Uncertainty(1σ)
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Nb- 99 U-235 Thermal 4.059030e-02 3.494410e-03
Nb- 99 U-235 Fast 3.937590e-02 5.198380e-03
Nb- 99 U-235 High 3.554950e-02 6.219030e-03
Nb- 99 U-238 Fast 4.099190e-02 4.112890e-03
Nb- 99 U-238 High 3.810930e-02 4.915520e-03
Nb- 99 Pu-239 Thermal 4.210090e-02 1.434120e-02
Nb- 99 Pu-239 Fast 4.042940e-02 7.191250e-03
Nb- 99 Pu-239 High 3.354130e-02 8.165440e-03
Nb- 99 Pu-241 Thermal 3.964970e-02 7.115010e-03
Nb- 99 Pu-241 Fast 3.673920e-02 6.598890e-03
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Nb- 99m U-235 Thermal 2.119570e-02 3.558070e-03
Nb- 99m U-235 Fast 2.122070e-02 4.570870e-03
Nb- 99m U-235 High 1.645510e-02 5.156580e-03
Nb- 99m U-238 Fast 2.246990e-02 4.492430e-03
Nb- 99m U-238 High 2.033880e-02 4.445930e-03
Nb- 99m Pu-239 Thermal 2.065860e-02 6.439860e-03
Nb- 99m Pu-239 Fast 2.025960e-02 5.085170e-03
Nb- 99m Pu-239 High 1.382040e-02 2.829820e-03
Nb- 99m Pu-241 Thermal 2.119520e-02 5.407330e-03
Nb- 99m Pu-241 Fast 1.972200e-02 5.046340e-03
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Thermal=0.0253eV, Fast=500keV(Fast reactor spectrum), High=14MeV
→ Neutron-induced and Spontaneous Fission Yields of all nuclides in JENDL-4.0 Fission Yield Data