%0 Journal Article
%A Dyszel, P.
%A Grzywacz, R.
%A Xu, Z. Y.
%A Kitamura, N.
%A Karny, M.
%A Korgul, A.
%A Madurga, M.
%A Neupane, S.
%A Algora, A.
%A Andreyev, A. N.
%A Araszkiewicz, M.
%A Bark, R. A.
%A Benito García, Jaime
%A Bernier, Nikita
%A Borge, M. J. G.
%A Caballero Rodríguez, Miriam
%A Chuchala, P.
%A Cocolios, T. E.
%A Costache, C.
%A Cubiss, J. G.
%A DeWitte, H.
%A Escher, J. E.
%A Fernandez-Ruiz, D.
%A Fijalkowska, A.
%A Fraile Prieto, Luis Mario
%A Fynbo, H. O. U.
%A Gouge, J.
%A López Herraiz, Joaquín
%A Illana Sisón, Andrés
%A Jones, P. M.
%A Judson, D. S.
%A Kamińska, P.
%A Kawano, T.
%A Kolos, K.
%A Labiche, M.
%A Lică, R.
%A Llanos Expósito, Mario
%A Grarcía de Lorenzo, Gabriel
%A Marginean, N.
%A Michelon, I.
%A Mihai, C.
%A Nácher, E.
%A Neacsu, C.
%A Nielsen, J. S.
%A Olaizola, B.
%A Orce, J. N.
%A Page, C. A. A.
%A Page, R. D.
%A Pakarinen, J.
%A Perea, A.
%A Piersa-Silkowska, Monika
%A Podolyák, Zs.
%A Prieto, J. S.
%A Rajabali, M.
%A Shaw, J.
%A Sison, A. I.
%A Solak, K.
%A Stryjczyk, M.
%A Tengblad, O.
%A Vicente, P. G. T.
%A Warr, N.
%A Wilson, J.
%A Yue, Z.
%A Zajda, S.
%T First <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>β</mml:mi></mml:mrow></mml:math>-Delayed Two-Neutron Spectroscopy of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>r</mml:mi></mml:mrow></mml:math>-Process Nucleus <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>In</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>134</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> and Observation of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>i</mml:mi></mml:mrow><mml:mrow><mml:mn>13</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> Single-Particle Neutron State in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Sn</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>133</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
%D 2025
%@ 0031-9007
%U https://hdl.handle.net/20.500.14352/131526
%X This manuscript reports on the direct observation of a β-delayed two-neutron emission in a study of 134In at the ISOLDE Decay Station using neutron spectroscopy. We also report on the first measurement in β-decay of the long-sought 13/2+ excited state in 133Sn, attributed to be the neutron single-particle i13/2 orbital. The observation of sequential neutron emission is used to extract the relative population of the i13/2 state, which was found to be much smaller than the predictions of the statistical model. The experiment was possible because of the innovative use of a neutron array with neutron discrimination and interaction tracking capabilities. This is the first study of the details of the two-neutron emission for a nucleus, which belongs to the r-process path. Understanding β-delayed two-neutron emission probabilities is essential to validate models used in astrophysical r-process nucleosynthesis calculations. Observing two-neutron emissions in β-decay paves the way for new experiments to study energy and angular correlations for β-delayed multineutron emitters.
%~