Intermediate states in fission

Contents: Fission Fragment Distributions: Experiment and Theory -- Fission Barriers, Fission Channels, Fission Valleys Fragment Charge Distributions in Low Energy Fission Double-Energy, Double-Velocity Measurement of Fission Fragments from Thermal Neutron Induced Fission Odd-Even Neutron and Proton Effects in Low Energy Nuclear Fission Energy Balance in MeV Neutron Induced Fission Formation of the Fragment Mass and Energy Distributions in Fission of Nuclei Lighter than Radium A New Approach to Determine Elemental Yield, Charge Polarisation and Odd-even Effects in Fission Fundamental Fission Problems -- Dissipation and Friction in Nuclear Fission Influence of Diabaticity on Fission Fragment Mass Asymmetry Space Parity Violation in Nuclear Fission.

Cold fission

Nuclear fission

Isotopes of samarium

Long-lived fission product

Fast fission

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Citations (2)

Angular and Energy Distributions of Prompt Fission Neutrons from the Thermal-Neutron Induced Fission of 233U, 235U, and 239Pu and the Spontaneous Fission of 252Cf

Bulletin of the Russian Academy of Sciences Physics (2018)

A. S. Vorobyev O. A. Shcherbakov A. M. Gagarski G. V. Val’ski G. A. Petrov

Long-lived fission product

Fast fission

Cold fission

Spontaneous fission

Prompt neutron

Nuclear fission

Xenon-135

10.3103/s106287381810026x

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Citations (3)

Times of emission of K x rays from U235 fission fragments of known mass

Journal of Applied Physics (1974)

R. A. Lerche B.W. Wehring M. E. Wyman

In order to obtain information about the nuclear transitions that produce fission-fragment x rays, the yield of K x rays emitted in the thermal-neutron fission of U235 was measured as a function of the time after fission for times between 1 and 60 nsec, as a function of the mass of the fragment emitting the x ray, and as a function of the total kinetic energy of the fragment pair emitting the x ray. Three-parameter data were recorded event by event. Two of the parameters contained information about the energies of the fission fragments from which it was possible to calculate the mass of each fragment. The third parameter contained information from which the elapsed time between the detection of one of the fission fragments and the detection of the x ray could be calculated. The results are compared with previously reported results for Cf252 and U235. There appears to be little difference between the Cf252 and U235 x-ray yields per fragment. A sufficient understanding of the mechanisms responsible for x-ray emission would permit the independent yield distributions of nuclides produced in fission to be obtained from measured x-ray yields.

Cold fission

Nuclide

Spontaneous fission

Fragment (logic)

Prompt neutron

10.1063/1.1663586

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Citations (5)

Investigation of prompt neutrons accompanying spontaneous ternary fission of 252Cf

Nuclear Physics A (1970)

H. Piekarz J. Błocki T. Krogulski E. Piasecki

Cold fission

Prompt neutron

Fast fission

Alpha particle

Spontaneous fission

10.1016/0375-9474(70)91103-6

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Citations (6)

Investigation of fission charge yield evolution

T. Granier T. Ethvignot Ν. Fotiades W. Younes

Prompt K X-ray emission yields in the fission induced by neutrons on 238 U have been measured for the first time for incident energies ranging from below 1 MeV up to 400 MeV. Results are used to investigate the evolution with incident neutron energy of the fragment elemental distribution and the X- ray emission probability per element. The progressive increase of the symmetric fission probability with neutron energy is observed in qualitative agreement with Wahl systematics for the primary fission fragment charge yields.

Cold fission

Fast fission

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Citations (0)

Symmetric and asymmetric fission of 226Ra induced by 5 to 15 MeV neutrons

Nuclear Physics A (1973)

E.A. Zhagrov I.M. Kuks Yu.A. Nemilov Yu.A. Selitskii V. B. Funstein

Cold fission

Spontaneous fission

Prompt neutron

10.1016/0375-9474(73)90744-6

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Citations (12)

Nuclear Charge Distribution in the Fission of Uranium and Thorium with 13.6-Mev Deuterons

Physical Review (1957)

J. Alexander Charles D. Coryell

Measurements have been made of independent fission yields and valley-to-peak ratios in 13.6-Mev deuteron fission and fast-neutron fission of ${\mathrm{U}}^{238}$ and ${\mathrm{Th}}^{232}$. From these measurements the conclusion is drawn that deuteron capture precedes a large fraction of the deuteron-induced fission events. The primary distribution of yields along a mass chain can be adequately explained by the postulate of equal charge displacement with the same distribution curve found applicable in low-energy neutron fission, best results requiring a slightly greater tendency for neutron emission in the heavy fragments.

Cold fission

Uranium-238

Photofission

Fast fission

Uranium-235

Isotopes of uranium

10.1103/physrev.108.1274

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Citations (28)

Uncertainty of decay heat calculations originating from errors in the nuclear data and the yields of individual fission products

Journal of Radioanalytical Chemistry (1980)

G. Rudstam