Half-Life of the New Isotope <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Na</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>32</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>; Observation of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Na</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>33</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> and Other New Isotopes Produced in the Reaction of High-Energy Protons on U

R. Klapisch; C. Thibault; A. M. Poskanzer; R. Prieels; C. Rigaud; E. Roeckl

doi:10.1103/PhysRevLett.29.1254

Half-Life of the New Isotope ${}^{32}{Na}$ ; Observation of ${}^{33}{Na}$ and Other New Isotopes Produced in the Reaction of High-Energy Protons on U

R. Klapisch, C. Thibault, A. M. Poskanzer, R. Prieels, C. Rigaud, and E. Roeckl

Phys. Rev. Lett. 29, 1254 – Published 30 October 1972

Abstract

With an improved on-line mass spectrometer we have discovered, by means of the reaction of 24-GeV protons on uranium, the very neutron-rich isotope ${}^{32}{Na}$ and measured its half-life. We have also produced in the same reaction the new isotopes ${}^{33}{Na}$ , ${}^{48 - 50}K$ , and ${}^{227, 228}{Fr}$ . There is evidence for shell effects in the cross sections of the new sodium isotopes.

Received 3 August 1972

DOI:https://doi.org/10.1103/PhysRevLett.29.1254

Authors & Affiliations

R. Klapisch, C. Thibault, A. M. Poskanzer^*, R. Prieels^†, C. Rigaud, and E. Roeckl^‡

Laboratoire René Bernas du Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, 91 Orsay, France

^*Guggenheim Fellow. Permanent address: Lawrence Berkeley Laboratory, University of California, Berkeley, Calif. 94720.
^†On leave from Institut de Physique Corpusculaire, Université de Louvain, Louvain-la-Neuve, Belgium.
^‡Permanent address: Gesellschaft für Schwerionforschung (GSI), Darmstadt, Germany.