First observation of two-proton radioactivity in 48Ni.

Authors :: Pomorski, M.
Pfützner, M.
Dominik, W.
Grzywacz, R.
Baumann, T.
Berryman, J. S.
Czyrkowski, H.
Dabrowski, R.
Ginter, T.
Johnson, J.
Kaminski, G.
Kuzniak, A.
Larson, N.
Liddick, S. N.
Madurga, M.
Mazzocchi, C.
Mianowski, S.
Miernik, K.
Miller, D.
Paulauskas, S.
Source :: Physical Review C: Nuclear Physics. Jun2011, Vol. 83 Issue 6, p61303:1-61303:4. 4p.
Publication Year :: 2011
Abstract: The decay of the extremely neutron-deficient 48Ni was studied by means of an imaging time-projection chamber, which allowed the recording of tracks of charged particles. The decays of six atoms were observed. Four of them clearly correspond to two-proton radioactivity, providing the first direct evidence for this decay mode in 48Ni. Two decays represent β-delayed proton emission. The half-life of 48Ni is determined to be T1/2 = 2.1-0.4+1.4 ms. [ABSTRACT FROM AUTHOR]