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Mg19 two-proton decay lifetime

Voss, P, Baumann, T, Bazin, D, Dewald, A, Iwasaki, H, Miller, D, Ratkiewicz, A, Spyrou, A, Starosta, K, Thoennessen, M , Vaman, C and Tostevin, JA (2014) Mg19 two-proton decay lifetime Physical Review C: Nuclear Physics, 90, 014301.

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The ground state two-proton decay lifetime of Mg19, populated by the one-neutron knockout of an intermediate-energy Mg20 radioactive beam, was measured utilizing a new experimental technique. A thin silicon detector positioned at varying distances (0.0–1.0 mm) downstream of the reaction target measured the energy loss of Mg19 and the two-proton decay product Ne17. The lifetime was deduced from fits to the measured energy-loss line shapes and depended upon the contribution of prompt reaction processes to the yield of Ne17. For relative Ne17 prompt contributions from 82% to 92%, the extracted lifetimes ranged from 1.75+0.43−0.42 to 6.4+2.4−2.7 ps. The results are consistent with the previously reported Mg19 lifetime measurement and serve as both an important complementary study and a validation of this new technique, which can provide lifetime information for short-lived states beyond the proton drip line.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Voss, P
Baumann, T
Bazin, D
Dewald, A
Iwasaki, H
Miller, D
Ratkiewicz, A
Spyrou, A
Starosta, K
Thoennessen, M
Vaman, C
Tostevin, JA
Date : 8 July 2014
DOI : 10.1103/PhysRevC.90.014301
Related URLs :
Additional Information : Copyright 2014 The American Physical Society.
Depositing User : Symplectic Elements
Date Deposited : 06 Aug 2014 10:45
Last Modified : 31 Oct 2017 16:50

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