42-Mo-99
Spin
Level energy(keV) Spin & Parity
----------------------------------------
ground state 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)
98.907708509 ± 0.000000517 (amu) [mass excess = -85968.970 ± 0.482 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
1357.806 ± 0.891 (keV)
Strong Gamma-rays from Decay of Mo- 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
----------------------------------------------------------
181.07 6.14 B-
739.50 12.26 B-
777.92 4.3 B-
----------------------------------------------------------
*: 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- 65.976 H 24
Cross Sections (taken from JENDL-4.0)
Table of cross sections, Mo-99.
Figures of cross sections, Mo-99: type-1: type-2: type-3.
type-1: total, elastic and inelastic scattering, capture and fision cross sections
type-2: same as type-1 but cross sections are averaged in 70 energy group intervals
type-3: threshold reaction cross sections
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Mo- 98 (Z= 42, A= 98), MT=102 (n,γ)
Mo- 99 (Z= 42, A= 99), MT= 2 (Elastic scattering)
Mo- 99 (Z= 42, A= 99), MT= 4 (Inelastic scattering)
Mo-100 (Z= 42, A=100), MT= 16 (n,2n)
Tc- 99 (Z= 43, A= 99), MT=103 (n,p)
Ru-101 (Z= 44, A=101), MT=106 (n,3He)
Ru-102 (Z= 44, A=102), MT=107 (n,α)
Ru-103 (Z= 44, A=103), MT= 22 (n,nα)
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)
-----------------------------------------------------------
Mo- 99 U-235 Thermal 4.274900e-04 6.839830e-05
Mo- 99 U-235 Fast 7.225090e-06 4.624050e-06
Mo- 99 U-235 High 2.731240e-04 1.747990e-04
Mo- 99 U-238 Fast 4.571710e-07 2.925890e-07
Mo- 99 U-238 High 1.135230e-05 7.265510e-06
Mo- 99 Pu-239 Thermal 3.750110e-04 2.400070e-04
Mo- 99 Pu-239 Fast 1.311290e-04 8.392240e-05
Mo- 99 Pu-239 High 8.317090e-04 5.322940e-04
Mo- 99 Pu-241 Thermal 1.328220e-05 8.500570e-06
Mo- 99 Pu-241 Fast 8.873330e-06 5.678930e-06
-----------------------------------------------------------
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)
-----------------------------------------------------------
Mo- 99 U-235 Thermal 6.138690e-02 9.061700e-04
Mo- 99 U-235 Fast 5.977620e-02 9.007020e-04
Mo- 99 U-235 High 5.163600e-02 1.464970e-03
Mo- 99 U-238 Fast 6.258590e-02 1.249740e-03
Mo- 99 U-238 High 5.766620e-02 1.006380e-03
Mo- 99 Pu-239 Thermal 6.232880e-02 8.950530e-04
Mo- 99 Pu-239 Fast 6.003000e-02 1.213930e-03
Mo- 99 Pu-239 High 4.765440e-02 1.906690e-03
Mo- 99 Pu-241 Thermal 6.003160e-02 1.261940e-03
Mo- 99 Pu-241 Fast 5.570090e-02 3.342760e-03
-----------------------------------------------------------
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