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

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 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.

scholarly journals Validating the Bohr hypothesis: Comparing fission-product yields from photon-induced fission of 240Pu and neutron-induced fission of Pu

2020 ◽  
Vol 239 ◽  
pp. 03004
Author(s):  
Jack Silano ◽  
Anton Tonchev ◽  
Roger Henderson ◽  
Nicolas Schunck ◽  
Werner Tornow ◽  
...  
Keyword(s):  
Fission Product ◽  
Excitation Energy ◽  
Nuclear Fission ◽  
Photon Beams ◽  
Fission Process ◽  
Product Yields ◽  
Fission Product Yields ◽  
Consistent Manner ◽  
First Results ◽  
Induced Fission

The Bohr hypothesis, one of the most fundamental assumptions in nuclear fission theory, states that the decay of a compound nucleus with a given excitation energy, spin and parity is independent of its formation. Using fission product yields (FPYs) as a sensitive probe, we have performed new high precision test of the combined effects of the entrance channel, spin and parity on the fission process. Two different reactions were used in a self-consistent manner to produce a compound 240Pu nucleus with the same excitation energy: neutron induced fission of 239Pu at En = 4.6 MeV and photon-induced fission of 240Pu at Eγ = 11.2 MeV. 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 (HlγS) facility. The first results comparing the FPYs from these two reactions will be presented. Implications for validating the Bohr hypothesis will be discussed.

scholarly journals Measurement of Fission Product Yields from Neutron-Induced Fission of Americium-241

1999 ◽  
Vol 36 (3) ◽  
pp. 232-241 ◽  
Author(s):  
Nobuo SHINOHARA ◽  
Yuichi HATSUKAWA ◽  
Kentaro HATA ◽  
Nobuaki KOHNO
Keyword(s):  
Fission Product ◽  
Product Yields ◽  
Fission Product Yields ◽  
Induced Fission

scholarly journals MEASUREMENT OF FISSION PRODUCT YIELDS FROM FAST-NEUTRON-INDUCED FISSION

2013 ◽  
Author(s):  
C. W. ARNOLD ◽  
E. M. BOND ◽  
T. A. BREDEWEG ◽  
M. M. FOWLER ◽  
W. A. MOODY ◽  
...  
Keyword(s):  
Fission Product ◽  
Fast Neutron ◽  
Product Yields ◽  
Fission Product Yields ◽  
Induced Fission

scholarly journals Toward short-lived and energy-dependent fission product yields from neutron-induced fission

2020 ◽  
Vol 239 ◽  
pp. 03001
Author(s):  
Anton P Tonchev ◽  
Jack A Silano ◽  
Chris Hagmann ◽  
Roger Henderson ◽  
Mark A Stoyer ◽  
...  
Keyword(s):  
Fission Product ◽  
Fission Products ◽  
Incident Neutron ◽  
Tandem Accelerator ◽  
Precision Data ◽  
Product Yields ◽  
Fission Product Yields ◽  
Induced Fission ◽  
Energy Dependent ◽  
Fission Yields

Fission product yields (FPYs) are an important source of information that are used for basic and applied physics. They are essential observables to address questions relevant to nucleosynthesis in the cosmos that created the elements from iron to uranium, for example, in energy generating processes from fission recycling in binary neutron star mergers; resolving the reactor neutrino anomaly; decay heat release in nuclear reactors; and many national security applications. While new applications will require accurate energy-dependent FPY data over a broad set of incident neutron energies, the current evaluated FPY data files contain only three energy points: thermal, fast, and 14-MeV incident energies. Recent measurements using mono-energetic and pulsed neutron beams at the Triangle Universities Nuclear Laboratory (TUNL) tandem accelerator and employing a dual fission ionization chambers setup have produced self-consistent, high-precision data critical for testing fission models for the neutron-induced fission of the major actinide nuclei. This paper will present new campaign just beginning utilizing a RApid Belt-driven Irradiated Target Transfer System (RABITTS) to measure shorter-lived fission products and the time dependence of fission yields, expanding the measurements from cumulative towards independent fission yields.

Sign in / Sign up

Export Citation Format

Share Document