Short-lived fission product measurements from >0.1 MeV neutron-induced fission using boron carbide

2012 ◽  
Vol 293 (1) ◽  
pp. 267-272 ◽  
Author(s):  
Erin Finn ◽  
Lori Metz ◽  
Larry Greenwood ◽  
Bruce Pierson ◽  
Judah Friese ◽  
...  
Keyword(s):  
Fission Product ◽  
Boron Carbide ◽  
Induced Fission

Cumulative yields of stable and long-lived isotopes of tin in neutron-induced fission

1983 ◽  
Vol 61 (11) ◽  
pp. 1490-1497 ◽  
Author(s):  
K. J. R. Rosman ◽  
J. R. De Laeter ◽  
J. W. Boldeman ◽  
H. G. Thode
Keyword(s):  
Stable Isotopes ◽  
Fine Structure ◽  
Fission Product ◽  
Mass Spectrometer ◽  
Smooth Curve ◽  
Mass Region ◽  
Neutron Fission ◽  
Source Mass ◽  
Induced Fission ◽  
Fission Yields

The relative cumulative fission yields of the six stable isotopes of tin (117Sn,118Sn, 119Sn, 120Sn, 122Sn, and 124Sn) and the long-lived isotope 126Sn have been measured in the thermal and epicadium neutron fission of 233U and 235U, and the epicadium neutron fission of 238U. Nanogram-sized fission product tin samples were extracted from irradiated uranium samples and analyzed in a solid source mass spectrometer. In each case a smooth curve can be drawn through the yield points of the seven isotopes of tin. There is, therefore, no evidence of "fine structure" in the 117 ≤ A ≤ 126 portion of the symmetric mass region.

scholarly journals Fission Product Yield Measurements from Neutron-Induced Fission of 235,238 U and 239Pu

2020 ◽  
Vol 232 ◽  
pp. 03006
Author(s):  
M. A. Stoyer ◽  
A. P. Tonchev ◽  
J. A. Silano ◽  
M. E. Gooden ◽  
J. B. Wilhelmy ◽  
...  
Keyword(s):  
Fission Product ◽  
Nuclear Physics ◽  
Fission Products ◽  
Product Yield ◽  
Tandem Accelerator ◽  
Precision Data ◽  
High Precision Data ◽  
Induced Fission ◽  
The Impact ◽  
Fission Yields

Fission product yields (FPY) are one of the most fundamental quantities that can be measured for a fissioning nucleus and are important for basic and applied nuclear physics. Recent measurements using mono-energetic and pulsed neutron beams generated using Triangle Universities Nuclear Laboratory’s tandem accelerator and employing a dual fission chamber setup have produced self-consistent, high-precision data critical for testing fission models for the neutron-induced fission of 235,238U and 239Pu between neutron energies of 0.5 to 15.0 MeV. These data have elucidated a low-energy dependence of FPY for several fission products using irradiations of varying lengths and neutron energies. This paper will discuss new measurements just beginning utilizing a RApid Belt-driven Irradiated Target Transfer System (RABITTS) to measure shorterlived fission products and the time dependence of fission yields, expanding the measurements from cumulative towards independent fission yields. The uniqueness of these FPY data and the impact on the development of fission theory will be discussed.

Measurement of fission product yields in the quasi-mono-energetic neutron-induced fission of 238U

2015 ◽  
Vol 941 ◽  
pp. 16-37 ◽  
Author(s):  
H. Naik ◽  
Sadhana Mukerji ◽  
Rita Crasta ◽  
S.V. Suryanarayana ◽  
S.C. Sharma ◽  
...  
Keyword(s):  
Fission Product ◽  
Product Yields ◽  
Fission Product Yields ◽  
Induced Fission ◽  
Energetic Neutron

Fission Product Yields from 11.3 MeV Neutron-Induced Fission of 238U

1994 ◽  
Vol 64 (2) ◽  
Author(s):  
Ze Li ◽  
Xiuzhi Wang ◽  
Kexing Jing ◽  
Anzhi Cui ◽  
Darning Liu ◽  
...  
Keyword(s):  
Fission Product ◽  
Product Yields ◽  
Fission Product Yields ◽  
Induced Fission

scholarly journals Exploratory study of fission product yields of neutron-induced fission ofU235, U238, andPu239at 8.9 MeV

2015 ◽  
Vol 91 (6) ◽  
Author(s):  
C. Bhatia ◽  
B. F. Fallin ◽  
M. E. Gooden ◽  
C. R. Howell ◽  
J. H. Kelley ◽  
...  
Keyword(s):  
Fission Product ◽  
Exploratory Study ◽  
Product Yields ◽  
Fission Product Yields ◽  
Induced Fission

scholarly journals Comparing fission-product yields from photon-induced fission of 240Pu and neutron-induced fission of 239Pu as a test of the Bohr hypothesis in nuclear fission

2020 ◽  
Vol 242 ◽  
pp. 01008
Author(s):  
Jack Silano ◽  
Anton Tonchev ◽  
Roger Henderson ◽  
Nicolas Schunck ◽  
Werner Tornow ◽  
...  
Keyword(s):  
Fission Product ◽  
Excitation Energy ◽  
Compound Nucleus ◽  
Nuclear Fission ◽  
Photon Beams ◽  
Fission Process ◽  
Product Yields ◽  
Fission Product Yields ◽  
Induced Fission ◽  
First Time

Fission product yields (FPYs) are a uniquely sensitive probe of the fission process, with well established dependence on the species of nucleus undergoing fission, its excitation energy and spin. Thus FPYs are well suited for testing Bohr’s hypothesis in the context of nuclear fission, which states that the decay of a compound nucleus with a given excitation energy, spin and parity is independent of its formation. Using FPYs, we have performed a new highprecision test of the combined effects of the entrance channel, spin and parity on the fission process from two of the most commonly used particles to induce fission neutrons and photons. The 239 Pu(n,f) reaction at En = 4.6 MeV and the 240 Pu(γ,f) reaction at Eγ = 11.2 MeV were used to produce a 240 Pu∗ compound nucleus with the same excitation energy. The FPYs from these two reactions were measured using quasimonoenergetic neutron beams from the TUNL’s FN tandem Van de Graaff accelerator and quasimonenergetic photon beams from the High Intensity γ-ray Source (HIγS) facility. The FPYs from these two reactions are compared quantitatively for the first time.

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