Mg-19 two-proton decay lifetime - Kölner UniversitätsPublikationsServer

Voss, P., Baumann, T., Bazin, D., Dewald, A., Iwasaki, H., Miller, D., Ratkiewicz, A., Spyrou, A., Starosta, K., Thoennessen, M., Vaman, C. and Tostevin, J. A. (2014). Mg-19 two-proton decay lifetime. Phys. Rev. C, 90 (1). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1089-490X

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DOI:10.1103/PhysRevC.90.014301

Abstract

The ground state two-proton decay lifetime of Mg-19, populated by the one-neutron knockout of an intermediate-energy Mg-20 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 Mg-19 and the two-proton decay product Ne-17. 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 Ne-17. For relative Ne-17 prompt contributions from 82% to 92%, the extracted lifetimes ranged from 1.75(-0.42)(+0.43) to 6.4(-2.7)(+2.4) ps. The results are consistent with the previously reported Mg-19 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:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Voss, P.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Baumann, T.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Bazin, D.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Dewald, A.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Iwasaki, H.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Miller, D.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Ratkiewicz, A.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Spyrou, A.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Starosta, K.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Thoennessen, M.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Vaman, C.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Tostevin, J. A.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED