Discovery of fermium-259

A 1.5-sec spontaneous fission activity has been produced by irradiation of /sup 257/Fm with 16-MeV tritons at the Los Alamos Tandem Van de Graaff Facility. On the basis of cross section and fission systematics, this 1.5-sec activity has been attributed to /sup 259/Fm formed by the reaction, /sup 257...

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Detalles Bibliográficos
Autores principales: Hoffman, D C, Hulet, E K, Landrum, J H, Lougheed, R W, Weber, J, Wild, J F, Wilhelmy, J B
Lenguaje:eng
Publicado: CERN 1976
Materias:
Nuclear Physics
Acceso en línea:https://dx.doi.org/10.5170/CERN-1976-013.558
http://cds.cern.ch/record/873829
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author Hoffman, D C
Hulet, E K
Landrum, J H
Lougheed, R W
Weber, J
Wild, J F
Wilhelmy, J B
author_facet Hoffman, D C
Hulet, E K
Landrum, J H
Lougheed, R W
Weber, J
Wild, J F
Wilhelmy, J B
author_sort Hoffman, D C
collection CERN
description A 1.5-sec spontaneous fission activity has been produced by irradiation of /sup 257/Fm with 16-MeV tritons at the Los Alamos Tandem Van de Graaff Facility. On the basis of cross section and fission systematics, this 1.5-sec activity has been attributed to /sup 259/Fm formed by the reaction, /sup 257/Fm(t, p)/sup 259/Fm. /sup 259 /Fm is the heaviest known isotope of fermium and has more neutrons than any other isotope so far identified. The mass distribution of the /sup 259/Fm is highly symmetric and the average total kinetic energy is very high, 230+or-2 MeV. These features continue the trend toward more symmetric mass distributions and higher total kinetic energies observed previously for the fermium isotopes as the number of neutrons is increased. (8 refs).
id cern-873829
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1976
publisher CERN
record_format invenio
spelling cern-8738292019-09-30T06:29:59Zdoi:10.5170/CERN-1976-013.558http://cds.cern.ch/record/873829engHoffman, D CHulet, E KLandrum, J HLougheed, R WWeber, JWild, J FWilhelmy, J BDiscovery of fermium-259Nuclear PhysicsA 1.5-sec spontaneous fission activity has been produced by irradiation of /sup 257/Fm with 16-MeV tritons at the Los Alamos Tandem Van de Graaff Facility. On the basis of cross section and fission systematics, this 1.5-sec activity has been attributed to /sup 259/Fm formed by the reaction, /sup 257/Fm(t, p)/sup 259/Fm. /sup 259 /Fm is the heaviest known isotope of fermium and has more neutrons than any other isotope so far identified. The mass distribution of the /sup 259/Fm is highly symmetric and the average total kinetic energy is very high, 230+or-2 MeV. These features continue the trend toward more symmetric mass distributions and higher total kinetic energies observed previously for the fermium isotopes as the number of neutrons is increased. (8 refs).CERNoai:cds.cern.ch:8738291976
spellingShingle Nuclear Physics
Hoffman, D C
Hulet, E K
Landrum, J H
Lougheed, R W
Weber, J
Wild, J F
Wilhelmy, J B
Discovery of fermium-259
title Discovery of fermium-259
title_full Discovery of fermium-259
title_fullStr Discovery of fermium-259
title_full_unstemmed Discovery of fermium-259
title_short Discovery of fermium-259
title_sort discovery of fermium-259
topic Nuclear Physics
url https://dx.doi.org/10.5170/CERN-1976-013.558
http://cds.cern.ch/record/873829
work_keys_str_mv AT hoffmandc discoveryoffermium259
AT huletek discoveryoffermium259
AT landrumjh discoveryoffermium259
AT lougheedrw discoveryoffermium259
AT weberj discoveryoffermium259
AT wildjf discoveryoffermium259
AT wilhelmyjb discoveryoffermium259

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