Fission Product Yields from 232Th, 238U, and 235U Using 14 MeV Neutrons

Pierson, Bruce D.; Greenwood, Lawrence R.; Flaska, Marek; Pozzi, Sara A.

doi:10.1016/j.nds.2017.01.004

Cited by 13 publications

(2 citation statements)

References 57 publications

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“…The user may program irradiation times, counting times, and transit speeds. FPYs have previously been measured using cyclic activation and a fast transit system at E n = 14.8 MeV [9]. A total of three RABITTS were constructed: a 1 m and a 10 m track for neutron-induced fission, and a 1 m track for photofission studies.…”

Section: Rabittsmentioning

confidence: 99%

Measurements of short-lived fission product yields using monoenergetic neutron and photon beams

et al. 2020

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A joint TUNL-LLNL-LANL collaboration was formed to measure the absolute fission product yields from the 235 U, 238 U, and 239 Pu isotopes. Our goal is to study the energy evolution of fission products using monoenergetic beams. In order to extend our successful fission product-yield studies to include products with shorter half-lives, a RApid Belt-driven Irradiated Target Transfer System, named RABITTS, was constructed. This system allows us to perform cyclic activation and quantify fission products with γ-ray spectroscopy using HPGe detectors. Both a 1 meter and 10 meter transfer system have been developed, with transit times of 0.4 and 1.1 seconds, respectively. Using these systems, we have measured sub-second half-lives. Our goal is to measure fission product yields from neutron-induced fission with En = 0.5 − 14.8 MeV and photofission with Eγ = 8 − 15 MeV. A detailed characterization of the system’s performance is presented, including preliminary fission product measurements, and the expected sensitivity.

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Section: Rabittsmentioning

confidence: 99%

Measurements of short-lived fission product yields using monoenergetic neutron and photon beams

et al. 2020

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“…Although it has been 75 years since the discovery of nuclear fission by Hahn and Strassmann [1], both its theoretical and experimental aspects remain intensively studied [2][3][4][5][6][7][8][9][10]. Nuclear fission, which entails complicated quantum many-body systems, provides a wealth of nuclear information.…”

Section: Introductionmentioning

confidence: 99%

Multi-parameter global calculations of fission fragments using a simplified two-dimensional scission-point model *

Wei¹,

Zhang²,

He³

et al. 2021

Chinese Phys. C

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Exploiting the concept of the dinuclear system, the interaction potential energy of two fragments that are quite close to each other is analyzed. A semi-classical method is used to calculate fission fragment yields using a simplified two-dimensional scission-point model. By considering the tip-to-tip orientation at the scission point of the fission process, we investigate the mass, charge, and kinetic-energy distributions of the fission fragments, for excitation energies in the 0-20 MeV range. Our results show that the fission fragment distributions are reproduced quite well, including the recent experimental results for the isotone chain [D Ramos et al. Phys. Rev. C 97, 054612 (2018)]. Thus, the simplified model is useful for multi-parameter global measurements of fission products.

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