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

A. A. Lis; C. Mazzocchi; W. Dominik; Z. Janas; M. Pfützner; M. Pomorski; L. Acosta; S. Baraeva; E. Casarejos; J. Duénas-Díaz; V. Dunin; J. M. Espino; A. Estrade; F. Farinon; A. Fomichev; H. Geissel; A. Gorshkov; G. Kamiński; O. Kiselev; R. Knöbel; S. Krupko; M. Kuich; Yu. A. Litvinov; G. Marquinez-Durán; I. Martel; I. Mukha; C. Nociforo; A. K. Ordúz; S. Pietri; A. Prochazka; A. M. Sánchez-Benítez; H. Simon; B. Sitar; R. Slepnev; M. Stanoiu; P. Strmen; I. Szarka; M. Takechi; Y. Tanaka; H. Weick; J. S. Winfield

doi:10.1103/physrevc.91.064309

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arXiv · 1505.07990

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

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Abstract

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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A. A. Lis, C. Mazzocchi, W. Dominik, Z. Janas, M. Pfützner, M. Pomorski, L. Acosta, S. Baraeva, E. Casarejos, J. Duénas-Díaz, V. Dunin, J. M. Espino, A. Estrade, F. Farinon, A. Fomichev, H. Geissel, A. Gorshkov, G. Kamiński, O. Kiselev, R. Knöbel, S. Krupko, M. Kuich, Yu. A. Litvinov, G. Marquinez-Durán, I. Martel, I. Mukha, C. Nociforo, A. K. Ordúz, S. Pietri, A. Prochazka, A. M. Sánchez-Benítez, H. Simon, B. Sitar, R. Slepnev, M. Stanoiu, P. Strmen, I. Szarka, M. Takechi, Y. Tanaka, H. Weick, J. S. Winfield. 2015-05-29. \b{eta}-delayed three-proton decay of 31Ar. https://doi.org/10.1103/physrevc.91.064309

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