ISOL beams of hafnium isotopes and isomers

U. Koester, O. Arndt, R. Catherall, J.G. Correia, B. Crepieux, R. Eichler, P. Fernier, L.M. Fraile, S. Hennrich, K. Johnston, S. Lukic, J. Neuhausen, B.S. Nara Singh, B. Pfeiffer, E. Siesling

Research output: Contribution to journalArticle

Abstract

The production of ISOL beams of hafnium is described. Radioactive Hf isotopes were produced at ISOLDE by 1.4 GeV proton-induced spallation in Ta and W foils. Chemical evaporation in form of HfF4 and mass separation in the molecular sideband HfF3+ after electron impact ionization provided intense and pure beams. Beams of 158-185Hf and short-lived isomers down to 1.1 s 177mHf were observed, but the method could be extended to reach even more exotic isotopes: down to about 154Hf (N=82) on the neutron-deficient side and up to neutron-rich 188Hf.
Original languageEnglish
Pages (from-to)293-296
Number of pages4
JournalThe European Physical Journal Special Topics
Volume150
Issue number1
DOIs
Publication statusPublished - 1 Nov 2007
Externally publishedYes

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hafnium isotopes
Hafnium
Isotopes
Isomers
Neutrons
isomers
Impact ionization
Radioisotopes
Metal foil
Protons
neutrons
Evaporation
hafnium
spallation
sidebands
radioactive isotopes
electron impact
Electrons
foils
isotopes

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Koester, U., Arndt, O., Catherall, R., Correia, J. G., Crepieux, B., Eichler, R., ... Siesling, E. (2007). ISOL beams of hafnium isotopes and isomers. The European Physical Journal Special Topics, 150(1), 293-296. https://doi.org/10.1140/epjst/e2007-00327-0
Koester, U. ; Arndt, O. ; Catherall, R. ; Correia, J.G. ; Crepieux, B. ; Eichler, R. ; Fernier, P. ; Fraile, L.M. ; Hennrich, S. ; Johnston, K. ; Lukic, S. ; Neuhausen, J. ; Nara Singh, B.S. ; Pfeiffer, B. ; Siesling, E. / ISOL beams of hafnium isotopes and isomers. In: The European Physical Journal Special Topics. 2007 ; Vol. 150, No. 1. pp. 293-296.
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abstract = "The production of ISOL beams of hafnium is described. Radioactive Hf isotopes were produced at ISOLDE by 1.4 GeV proton-induced spallation in Ta and W foils. Chemical evaporation in form of HfF4 and mass separation in the molecular sideband HfF3+ after electron impact ionization provided intense and pure beams. Beams of 158-185Hf and short-lived isomers down to 1.1 s 177mHf were observed, but the method could be extended to reach even more exotic isotopes: down to about 154Hf (N=82) on the neutron-deficient side and up to neutron-rich 188Hf.",
author = "U. Koester and O. Arndt and R. Catherall and J.G. Correia and B. Crepieux and R. Eichler and P. Fernier and L.M. Fraile and S. Hennrich and K. Johnston and S. Lukic and J. Neuhausen and {Nara Singh}, B.S. and B. Pfeiffer and E. Siesling",
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Koester, U, Arndt, O, Catherall, R, Correia, JG, Crepieux, B, Eichler, R, Fernier, P, Fraile, LM, Hennrich, S, Johnston, K, Lukic, S, Neuhausen, J, Nara Singh, BS, Pfeiffer, B & Siesling, E 2007, 'ISOL beams of hafnium isotopes and isomers' The European Physical Journal Special Topics, vol. 150, no. 1, pp. 293-296. https://doi.org/10.1140/epjst/e2007-00327-0

ISOL beams of hafnium isotopes and isomers. / Koester, U.; Arndt, O.; Catherall, R.; Correia, J.G.; Crepieux, B.; Eichler, R.; Fernier, P.; Fraile, L.M.; Hennrich, S.; Johnston, K.; Lukic, S.; Neuhausen, J.; Nara Singh, B.S.; Pfeiffer, B.; Siesling, E.

In: The European Physical Journal Special Topics, Vol. 150, No. 1, 01.11.2007, p. 293-296.

Research output: Contribution to journalArticle

TY - JOUR

T1 - ISOL beams of hafnium isotopes and isomers

AU - Koester, U.

AU - Arndt, O.

AU - Catherall, R.

AU - Correia, J.G.

AU - Crepieux, B.

AU - Eichler, R.

AU - Fernier, P.

AU - Fraile, L.M.

AU - Hennrich, S.

AU - Johnston, K.

AU - Lukic, S.

AU - Neuhausen, J.

AU - Nara Singh, B.S.

AU - Pfeiffer, B.

AU - Siesling, E.

N1 - 7th International Conference on Radioactive Nuclear Beams, Cortina, ITALY, JUL 02-07, 2006

PY - 2007/11/1

Y1 - 2007/11/1

N2 - The production of ISOL beams of hafnium is described. Radioactive Hf isotopes were produced at ISOLDE by 1.4 GeV proton-induced spallation in Ta and W foils. Chemical evaporation in form of HfF4 and mass separation in the molecular sideband HfF3+ after electron impact ionization provided intense and pure beams. Beams of 158-185Hf and short-lived isomers down to 1.1 s 177mHf were observed, but the method could be extended to reach even more exotic isotopes: down to about 154Hf (N=82) on the neutron-deficient side and up to neutron-rich 188Hf.

AB - The production of ISOL beams of hafnium is described. Radioactive Hf isotopes were produced at ISOLDE by 1.4 GeV proton-induced spallation in Ta and W foils. Chemical evaporation in form of HfF4 and mass separation in the molecular sideband HfF3+ after electron impact ionization provided intense and pure beams. Beams of 158-185Hf and short-lived isomers down to 1.1 s 177mHf were observed, but the method could be extended to reach even more exotic isotopes: down to about 154Hf (N=82) on the neutron-deficient side and up to neutron-rich 188Hf.

U2 - 10.1140/epjst/e2007-00327-0

DO - 10.1140/epjst/e2007-00327-0

M3 - Article

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EP - 296

JO - The European Physical Journal Special Topics

JF - The European Physical Journal Special Topics

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Koester U, Arndt O, Catherall R, Correia JG, Crepieux B, Eichler R et al. ISOL beams of hafnium isotopes and isomers. The European Physical Journal Special Topics. 2007 Nov 1;150(1):293-296. https://doi.org/10.1140/epjst/e2007-00327-0