b{eta}-delayed three-proton decay of 31Ar

A.A. Lis , C. Mazzocchi , W. Dominik , Z. Janas , M. Pf\"utzner , M. Pomorski , L. Acosta , S. Baraeva

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E. Casarejos J. Du\'enas-D\'iaz V. Dunin J. M. Espino A. Estrade F. Farinon A. Fomichev H. Geissel A. Gorshkov G. Kami\'nski O. Kiselev R. Kn\"obel S. Krupko M. Kuich Yu. A. Litvinov G. Marquinez-Dur\'an I. Martel I. Mukha C. Nociforo A.K. Ord\'uz S. Pietri A. Prochazka A.M. S\'anchez-Ben\'itez H. Simon B. Sitar R. Slepnev M. Stanoiu P. Strmen I. Szarka M. Takechi Y. Tanaka H. Weick J.S. Winfield

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classification ⚛️ nucl-ex

keywords decaydelayedemissionprotonsthree-protonadditionallowingbeam

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The beta decay of 31Ar, produced by fragmentation of a 36Ar beam at 880 MeV/nucleon, was investigated. Identified ions of 31Ar were stopped in a gaseous time projection chamber with optical readout allowing to record decay events with emission of protons. In addition to \b{eta}-delayed emission of one and two protons we have clearly observed the beta-delayed three-proton branch. The branching ratio for this channel in 31Ar is found to be 0.07(2)%.

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b{eta}-delayed three-proton decay of 31Ar

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