Decay studies of neutron-deficient odd-mass At and Bi isotopes

H. Kettunen; T. Enqvist; K. Eskola; T. Grahn; P. T. Greenlees; K. Helariutta; P. Jones; R. Julin; S. Juutinen; H. Kankaanpää; A. Keenan; H. Koivisto; P. Kuusiniemi; M. Leino; A. -P. Leppänen; M. Miukku; P. Nieminen; J. Pakarinen; P. Rahkila; J. Uusitalo

doi:10.1140/epjad/i2005-06-114-1

2022 Impact factor 2.7

Hadrons and Nuclei

Open Access

Eur. Phys. J. A (2005) 25: 181-182
https://doi.org/10.1140/epjad/i2005-06-114-1

ENAM 2004

Decay studies of neutron-deficient odd-mass At and Bi isotopes

H. Kettunen¹^*, T. Enqvist¹, K. Eskola², T. Grahn¹, P. T. Greenlees¹, K. Helariutta¹, P. Jones¹, R. Julin¹, S. Juutinen¹, H. Kankaanpää¹, A. Keenan¹, H. Koivisto¹, P. Kuusiniemi¹, M. Leino¹, A. -P. Leppänen¹, M. Miukku¹, P. Nieminen¹, J. Pakarinen¹, P. Rahkila¹ and J. Uusitalo¹

¹ Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40014, Jyväskylä, Finland
² Department of Physics, University of Helsinki, FIN-00014, Helsinki, Finland

^* e-mail: heikki.kettunen@phys.jyu.fi

Received: 12 September 2004
Accepted: 18 February 2005
Published online: 24 June 2005

Abstract

Alpha-decay properties of the isotope ¹⁹¹At were investigated for the first time and the decay properties of ¹⁹³At and ¹⁹⁵At were studied with improved accuracy. The nuclei were produced in fusion-evaporation reactions of ⁵⁴Fe and ⁵⁶Fe ions with ¹⁴¹Pr and ¹⁴²Nd targets. The fusion products were separated in-flight using the gas-filled recoil separator RITU and implanted into a position-sensitive silicon detector. The isotopes were identified using position, time and energy correlations between the implants and subsequent alpha decays. New information concerning the low-lying states in the corresponding alpha-decay daughter nuclei ¹⁸⁷Bi, ¹⁸⁹Bi and ¹⁹¹Bi was also gained using alpha-gamma coincidences.

PACS: 23.60.+e α decay – / 27.80.+w 190 ⩽ A ⩽ 219 – / 23.20.Lv γ transitions and level energies – / 21.10.Dr Binding energies and masses –

© Società Italiana di Fisica and Springer-Verlag, 2005