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Report No.

Beta-delayed proton emission from $$^{20}$$Mg

Lund, M. V.*; Andreyev, A. N.; Borge, M. J. G.*; Cederk$"a$ll, J.*; De Witte, H.*; Fraile, L. M.*; Fynbo, H. O. U.*; Greenlees, P. T.*; Harkness-Brennan, L. J.*; Howard, A. M.*; Huyse, M.*; Jonson, B.*; Judson, D. S.*; Kirsebom, O. S.*; Konki, J.*; Kurcewicz, J.*; Lazarus, I.*; Lica, R.*; Lindberg, S.*; Madurga, M.*; Marginean, N.*; Marroquin, I.*; Mihai, C.*; Munch, M.*; Nacher, E.*; Negret, A.*; Nilsson, T.*; Page, R. D.*; Pascu, S.*; Perea, A.*; Pucknell, V.*; Rahkila, P.*; Rapisarda, E.*; Riisager, K.*; Rotaru, F.*; Sotty, C.*; Stanoiu, M.*; Tengblad, O.*; Turturica, A.*; Van Duppen, P.*; Vedia, V.*; Wadsworth, R.*; Warr, N.*

Beta-delayed proton emission from $$^{20}$$Mg has been measured at ISOLDE, CERN, with the ISOLDE Decay Station setup including both charged-particle and $$gamma$$-ray detection capabilities. A total of 27 delayed proton branches were measured including seven so far unobserved. An updated decay scheme, including three new resonances above the proton separation energy in $$^{20}$$Na and more precise resonance energies, is presented. Beta-decay feeding to two resonances above the Isobaric Analogue State in $$^{20}$$Na is observed. This may allow studies of the 4032.9(2.4) keV resonance in $$^{19}$$Ne through the beta decay of $$^{20}$$Mg, which is important for the astrophysically relevant reaction $$^{15}$$O($$alpha$$,$$gamma$$)$$^{19}$$Ne. Beta-delayed protons were used to obtain a more precise value for the half-life of $$^{20}$$Mg, 91.4(1.0) ms.



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Category:Physics, Nuclear



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