Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains

I. Mukha; L. V. Grigorenko; D. Kostyleva; L. Acosta; E. Casarejos; A. A. Ciemny; W. Dominik; J. A. Dueñas; V. Dunin; J. M. Espino; A. Estradé; F. Farinon; A. Fomichev; H. Geissel; A. Gorshkov; Z. Janas; G. Kamiński; O. Kiselev; R. Knöbel; S. Krupko; M. Kuich; Yu. A. Litvinov; G. Marquinez-Durán; I. Martel; C. Mazzocchi; C. Nociforo; A. K. Ordúz; M. Pfützner; S. Pietri; M. Pomorski; A. Prochazka; S. Rymzhanova; A. M. Sánchez-Benítez; C. Scheidenberger; P. Sharov; H. Simon; B. Sitar; R. Slepnev; M. Stanoiu; P. Strmen; I. Szarka; M. Takechi; Y. K. Tanaka; H. Weick; M. Winkler; J. S. Winfield; X. Xu; M. V. Zhukov

doi:10.1103/PhysRevC.98.064308

Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains

I. Mukha¹, L. V. Grigorenko^2,3,4, D. Kostyleva^5,1,*, L. Acosta^6,7, E. Casarejos⁸, A. A. Ciemny⁹, W. Dominik⁹, J. A. Dueñas¹⁰, V. Dunin¹¹ et al.

J. M. Espino¹², A. Estradé¹³, F. Farinon¹, A. Fomichev², H. Geissel^1,5, A. Gorshkov², Z. Janas⁹, G. Kamiński^14,2, O. Kiselev¹, R. Knöbel^1,5, S. Krupko², M. Kuich^15,9, Yu. A. Litvinov¹, G. Marquinez-Durán¹⁶, I. Martel¹⁶, C. Mazzocchi⁹, C. Nociforo¹, A. K. Ordúz¹⁶, M. Pfützner^9,1, S. Pietri¹, M. Pomorski⁹, A. Prochazka¹, S. Rymzhanova², A. M. Sánchez-Benítez¹⁷, C. Scheidenberger^1,5, P. Sharov², H. Simon¹, B. Sitar¹⁸, R. Slepnev², M. Stanoiu¹⁹, P. Strmen¹⁸, I. Szarka¹⁸, M. Takechi¹, Y. K. Tanaka^1,20, H. Weick¹, M. Winkler¹, J. S. Winfield¹, X. Xu^21,5,1, and M. V. Zhukov²²

¹GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
²Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
³National Research Nuclear University MEPhI, 115409 Moscow, Russia
⁴National Research Centre, Kurchatov Institute, Kurchatov Square 1, 123182 Moscow, Russia
⁵II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
⁶INFN, Laboratori Nazionali del Sud, Via Santa Sofía, 95123 Catania, Italy
⁷Instituto de Física, Universidad Nacional Autónoma de México, México, Distrito Federal 01000, Mexico
⁸University of Vigo, 36310 Vigo, Spain
⁹Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
¹⁰Departamento de Ingenieria Electrica y Centro de Estudios Avanzados en Fisica, Matemáticas y Computación, Universidad de Huelva, 21071 Huelva, Spain
¹¹Veksler and Baldin Laboratory of High Energy Physics, JINR, 141980 Dubna, Russia
¹²Department of Atomic, Molecular and Nuclear Physics, University of Seville, 41012 Seville, Spain
¹³University of Edinburgh, EH1 1HT Edinburgh, United Kingdom
¹⁴Heavy Ion Laboratory, University of Warsaw, 02-093 Warszawa, Poland
¹⁵Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland
¹⁶Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
¹⁷Centro de Estudios Avanzados en Física, Matemáticas y Computación (CEAFMC), Department of Integrated Sciences, University of Huelva, 21071 Huelva, Spain
¹⁸Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
¹⁹IFIN-HH, Post Office Box MG-6, Bucharest, Romania
²⁰University of Tokyo, 113-0033 Tokyo, Japan
²¹School of Physics and Nuclear Energy Engineering, Beihang University, 100191 Beijing, China
²²Department of Physics, Chalmers University of Technology, S-41296 Göteborg, Sweden

^*Corresponding author: D.Kostyleva@gsi.de

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Phys. Rev. C 98, 064308 – Published 7 December, 2018

DOI: https://doi.org/10.1103/PhysRevC.98.064308

Abstract

The proton-unbound argon and chlorine isotopes have been studied by measuring trajectories of their decay-in-flight products by using a tracking technique with microstrip detectors. The proton ( $1 p$ ) and two-proton ( $2 p$ ) emission processes have been detected in the measured angular correlations “heavy-fragment”+ $p$ and “heavy-fragment”+ $p + p$ , respectively. The ground states of the previously unknown isotopes ${}^{30}{Cl}$ and ${}^{28}{Cl}$ have been observed for the first time, providing the $1 p$ -separation energies $S_{p}$ of $- 0.48 (2)$ and $- 1.60 (8)$ , MeV, respectively. The relevant systematics of $1 p$ - and $2 p$ -separation energies have been studied theoretically in the $core + p$ and $core + p + p$ cluster models. The first-time observed excited states of ${}^{31}{Ar}$ allow one to infer the $2 p$ -separation energy $S_{2 p}$ of 6(34) keV for its ground state. The first-time observed state in ${}^{29}{Ar}$ with $S_{2 p} = - 5.50 (18)$ MeV can be identified as either a ground state or an excited state according to different systematics.

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Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains

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Deep excursion beyond the proton dripline. II. Toward the limits of existence of nuclear structure

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Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains

Abstract

Physics Subject Headings (PhySH)

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Deep excursion beyond the proton dripline. II. Toward the limits of existence of nuclear structure

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