Disordering of Solids by Neutron Radiation

Snyder, W.S.; Neufeld, Jacob

doi:10.1103/physrev.97.1636

Cited by 122 publications

(17 citation statements)

References 8 publications

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“…In other measurements the BF, 3 3 counter, which is spherical, was covered with large spheres of polyethylene. In this configuration the counter has a response fiinction which approximates the Snyder-Neufeld [6] multicollision dose. These last measurements were made because they are more sensitive to low-energy neutrons which dominate the dose after one bend.…”

Section: Description Of Duct Experimentsmentioning

confidence: 99%

“…Direct comparison of the dose rate calculated from the measured spectrum with dosimeter measurements in the same position was in good agreement. Figures 5,6, and 7 are photographs of duct configurations for which measurements were obtained: a straight section (Fig. 5); a duct with one 90 bend (Fig* 6); and a duct with two 90 bends ( Fig.…”

Section: Description Of Duct Experimentsmentioning

confidence: 99%

“…The eplcadmium or nonthermal spectra at several locations along the duct centerline were also calculated for a three-legged duct. Using the flux-to-multicollisiondose factors of Snyder and Neufeld [6], eplcadmium multicollision dose rates were calculated at these locations [12] and are shovm in Table 1 in comparison with measurements by a dosimeter designed to give a response proportional to the SnyderNeufeld multicollision dose curve over the range of interest. …”

Section: Z^^>mentioning

confidence: 99%

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Neutron Transport Studies in Ducts and Simple Shields: Comparison of Monte Carlo and Discrete Ordinates Calculations With Experimental Results From the Tower Shielding Facility.

Clifford¹,

Muckenthaler²,

Maerker³

et al. 1967

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Section: Description Of Duct Experimentsmentioning

confidence: 99%

Section: Description Of Duct Experimentsmentioning

confidence: 99%

Section: Z^^>mentioning

confidence: 99%

See 1 more Smart Citation

Neutron Transport Studies in Ducts and Simple Shields: Comparison of Monte Carlo and Discrete Ordinates Calculations With Experimental Results From the Tower Shielding Facility.

Clifford¹,

Muckenthaler²,

Maerker³

et al. 1967

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“…before subsequent migration and thermal annealing is precluded. As a fi rst approach to the initial distribution of defects, at the completion of the cascade, the model of Snyder and Neufeld [5] is used. The value of the vacancy capture radius was carefully chosen so that the amount of residual damage is comparable to that calculated with other techniques, e.g.…”

Section: Volume 15 Number 5 May 2005mentioning

confidence: 99%

A comprehensive solution for simulating ultra-shallow junctions: From high dose/low energy implant to diffusion annealing

Boucard¹,

Roger²,

Chakarov³

et al. 2005

Materials Science and Engineering: B

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“…A number of theories exist for describing the development of a displacement cascade in an amorphous solid, ranging from elementary descriptions [3], [4] to rather involved treatments requiring the use of a computer to solve the integral equations obtained [5]-171. So far, however, none of these have been able to take into account either the crystallinity of the material or the manybody nature of the atomic collisions, both of which can be handled quite easily by computer simulation.…”

mentioning

confidence: 99%

Defects in Crystals Created by Ion Bombardment : Theory and Simulation

Torrens

1973

J. Phys. Colloques

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Rksurne. -Les processus de dommages crees par un ion energetique qui pengtre dans un solide cristallin sont traites d'une f a~o n qualitative. Les differentes methodes d'etudier les mkcanismes de dommage et les defauts cre6s sont decrites, et le rBle de la simulation k l'ordinateur dans la comparaison de la thkorie et l'expkrience est discute.Abstract. -The damage processes involved in the penetration of an energetic ion in a crystalline solid are reviewed qualitatively. Different methods of studying the mechanisms of damage and defects created are described and the role of computer simulation in the comparison of theory and experiment is discussed.1. Introduction. -When an energetic heavy ion penetrates the surface of a crystal, it slows down by interaction with the atoms and electrons of the crystal. The damage mechanisms are extremely complicated and not fully understood [I], [2]. Elastic energy transfer processes, electronic excitation and ionisation play roles of varying importance depending on the energy of the incident ion and on the type of solid. Because of the many-body nature of the interaction with the nuclei and electrons it is difficult to formulate a completely reliable theory of the distribution of the energy loss between elastic and inelastic processes. Inelastic loss to electrons can cause damage to insulators and semiconductors, but in the case of metals this energy is largely dissipated as heat without causing any permanent detectable damage. The observable effects occur through the direct or indirect displacement of atoms of the solid from their equilibrium positions. These atoms come to rest as a result of interaction with other atoms and the initial energy of the incident ion is dissipated in a multiple atomic displacement event known as an atomic displacement cascade. When the kinetic energy of the displaced atoms drops to a value comparable with the thermal energy of the undisturbed crystal atoms the final configuration relaxes to a stable damage state which depends on the temperature, background defect concentration and electronic nature of the solid.In order to estimate the amount of damage it is necessary to study the dynamics of the multiple displacement process during its creation and its partial annealing. For the former it is necessary to know something about the inelastic loss to electrons and (*) Now at Energy Division, OECD, Paris 16=, France. about the elastic interaction potential between the atoms. The latter is governed by the thermal motion of the defects created by displacement, so that their activation energies for formation and migration and the binding energies between different types of defect should be known.To a certain extent it is possible to treat these problems by analytical means. A number of theories exist for describing the development of a displacement cascade in an amorphous solid, ranging from elementary descriptions [3], [4] to rather involved treatments requiring the use of a computer to solve the integral equations obtained [5]-171. So far, however, non...

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Disordering of Solids by Neutron Radiation

Cited by 122 publications

References 8 publications

Neutron Transport Studies in Ducts and Simple Shields: Comparison of Monte Carlo and Discrete Ordinates Calculations With Experimental Results From the Tower Shielding Facility.

Neutron Transport Studies in Ducts and Simple Shields: Comparison of Monte Carlo and Discrete Ordinates Calculations With Experimental Results From the Tower Shielding Facility.

A comprehensive solution for simulating ultra-shallow junctions: From high dose/low energy implant to diffusion annealing

Defects in Crystals Created by Ion Bombardment : Theory and Simulation

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