<i>Elementary Pile Theory</i>

Soodak, Harry; Campbell, E.C.; Goertzel, G.

doi:10.1063/1.3066717

Cited by 7 publications

(2 citation statements)

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“…is the directed current which passes through a unit surface area [46], with λ s the mean free path for neutrons in the medium surrounding the detector. For a typical 3 He counter with 1" diameter and a few atmospheres gas pressure, ε ∼ 1 for thermal neutrons.…”

Section: A General Considerationsmentioning

confidence: 99%

Neutron flux and spectrum in the Dresden Felsenkeller underground facility studied by moderated He3 counters

et al. 2020

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Ambient neutrons may cause significant background for underground experiments. Therefore, it is necessary to investigate their flux and energy spectrum in order to devise a proper shielding. Here, two sets of altogether ten moderated 3 He neutron counters are used for a detailed study of the ambient neutron background in tunnel IV of the Felsenkeller facility, underground below 45 m of rock in Dresden/Germany. One of the moderators is lined with lead and thus sensitive to neutrons of energies higher than 10 MeV. For each 3 He counter moderator assembly, the energy-dependent neutron sensitivity was calculated with the FLUKA code. The count rates of the ten detectors were then fitted with the MAXED and GRAVEL packages. As a result, both the neutron energy spectrum from 10 −9 to 300 MeV and the flux integrated over the same energy range were determined experimentally. The data show that at a given depth, both the flux and the spectrum vary significantly depending on local conditions. Energy-integrated fluxes of (0.61 AE 0.05), (1.96 AE 0.15), and ð4.6 AE 0.4Þ × 10 −4 cm −2 s −1 , respectively, are measured for three sites within Felsenkeller tunnel IV which have similar muon flux but different shielding wall configurations. The integrated neutron flux data and the obtained spectra for the three sites are matched reasonably well by FLUKA Monte Carlo calculations that are based on the known muon flux and composition of the measurement room walls.

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Section: A General Considerationsmentioning

confidence: 99%

Neutron flux and spectrum in the Dresden Felsenkeller underground facility studied by moderated He3 counters

et al. 2020

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“…Interview with Sean F. Johnston. (Soodak and Campbell 1950). The 71 page simplified exposition was later superseded by a considerably expanded treatment (Glasstone and Edlund 1952) but as the foreword to Pile Theory emphasised, 'the greatest part of the work is still classified, and probably will remain so for some time' [p. vii].…”

Section: American Academic Definitionmentioning

confidence: 99%

Implanting a Discipline: The Academic Trajectory of Nuclear Engineering in the USA and UK

Johnston

2009

Minerva

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The nuclear engineer emerged as a new form of recognised technical professional between 1940 and the early 1960s as nuclear fission, the chain reaction and their applications were explored. The institutionalization of nuclear engineering-channelled into new national laboratories and corporate design offices during the decade after the war, and hurried into academic venues thereafter-proved unusually dependent on government definition and support. This paper contrasts the distinct histories of the new discipline in the USA and UK (and, more briefly, Canada). In the segregated and influential environments of institutional laboratories and factories, historical actors such as physicist Walter Zinn in the USA and industrial chemist Christopher Hinton in the UK proved influential in shaping the roles and perceptions of nuclear specialists. More broadly, I argue that the Statemanaged implantation of the new subject within further and higher education curricula was shaped strongly by distinct political and economic contexts in which secrecy, postwar prestige and differing industrial cultures were decisive factors.

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Produzione dei neutroni di bassa energia da parte della radiazione cosmica

Galli

1953

Nuovo Cim

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Elementary Pile Theory

Cited by 7 publications

References 0 publications

Neutron flux and spectrum in the Dresden Felsenkeller underground facility studied by moderated He3 counters

Neutron flux and spectrum in the Dresden Felsenkeller underground facility studied by moderated He3 counters

Implanting a Discipline: The Academic Trajectory of Nuclear Engineering in the USA and UK

Produzione dei neutroni di bassa energia da parte della radiazione cosmica

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