β -delayed proton emission from P 26 and S 27

Research output: Contribution to journalArticle

Abstract

Delayed emission of protons following β decay of neutron deficient nuclei P26 and S27 was investigated at the ACCULINNA separator in the Flerov Laboratory of Nuclear Reactions at Dubna. Ions of interest, identified in flight, were implanted into the active volume of the gaseous optical time projection chamber, which allowed us to record tracks of charged particles emitted in the decay. Total branching ratios for β-delayed proton emission and for β-delayed two-proton emission were determined. In addition, energy spectra for delayed protons below 2 MeV were established. Our findings for P26 agree with results of previous experiments. In the case of S27, however, the observed probability of delayed proton emission is an order of magnitude larger than reported in literature. Two new strong proton transitions were identified representing decays of the first two excited states of P27 to the ground state of Si26. The probability ratio of γ-to-proton emission from these states is discussed.

Details

Authors
  • M. Janiak
  • N. Sokołowska
  • A. Bezbakh
  • A. A. Ciemny
  • H. Czyrkowski
  • R. Dabrowski
  • W. Dominik
  • A. S. Fomichev
  • M. S. Golovkov
  • A. V. Gorshkov
  • Z Janas
  • G. Kamiński
  • S. A. Krupko
  • M. Kuich
  • C Mazzocchi
  • Marek Mentel
  • M Pfützner
  • P. Pluciński
  • M. Pomorski
  • R. S. Slepniev
  • B. Zalewski
Organisations
External organisations
  • University of Warsaw
  • AGH University of Science and Technology
  • Joint Institute for Nuclear Research, Dubna
  • Dubna University
  • Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number034315
JournalPhysical Review C: covering nuclear physics
Volume95
Issue number3
Publication statusPublished - 2017 Mar 16
Publication categoryResearch
Peer-reviewedYes