[Triumf-seminars] TRIUMF Seminar today at 14:00

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Date/Time: Fri 2003-07-11 at 14:00

Location:  Auditorium          

Speaker:   Bertram Blank (Argonne / CEN Bordeaux-Gradigan)

Title:     At the limits of nuclear stability: The observation of two-proton emission

Abstract: Two-proton radioactivity was proposed 40 years ago as a possible decay route for even-Z nuclei beyond the proton drip line. In cases where the sequential decay is energetically forbidden due to the pairing energy, a simultaneous two-proton emission is the only possible decay branch. Despite many experimental efforts over the last two decades, no such case could be found.

In recent experiments at GANIL and GSI, we studied the decay of 45Fe, according to theoretical predictions one of the most promising cases for 2p radioactivity. Our results show for the first time clear evidence of this new radioactivity.

In another experiment at GANIL, 2p emission was observed from excited states in 17Ne. In these complete kinematics measurements performed at the SPEG facility of GANIL, the angle between the two protons has been measured evidencing a 2He emission pattern. Both results will be presented and future studies discussed. The potential of two-proton radioactivity studies will be highlighted.

Stimulants available 15 min. before the talk

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