Determination of the half-life of Fr-213 with high precision

作者：Fisichella M^*; Musumarra A; Farinon F; Nociforo C; Del Zoppo A; Figuera P; La Cognata M; Pellegriti M G; Scuderi V; Torresi D; Strano E

来源：Physical Review C, 2013, 88(1): 011303.

DOI：10.1103/PhysRevC.88.011303

High-precision measurement of half-life and Q(alpha) value of neutral and highly charged alpha emitters is a major subject of investigation currently. In this framework, we recently pushed half-life measurements of neutral emitters to a precision of a few per mil. This result was achieved by using different techniques and apparatuses at Istituto Nazionale di Fisica Nucleare Laboratori Nazionali del Sud (INFN-LNS) and GSI Darmstadt. Here we report on Fr-213 half-life determination [T-1/2(Fr-213) = 34.14 +/- 0.06 s] at INFN-LNS, detailing the measurement protocol used. Direct comparison with the accepted value in the literature shows a discrepancy of more than three sigma. We propose this new value as a reference, discussing previous experiments.

• 出版日期2013-7-24