Two-proton radioactivity studies with {sup 45}Fe and {sup 48}Ni

Journal Article · Tue Nov 01 04:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.054315· OSTI ID:20699120

Dossat, C; Bey, A; Blank, B; Canchel, G; Fleury, A; Giovinazzo, J; Matea, I ^[1]; Santos, F de Oliveira; Georgiev, G; Grevy, S; Stefan, I ^[2]; Thomas, J C ^[2]; Adimi, N ^[3]; Borcea, C ^[4]; Gil, D Cortina; Caamano, M ^[5]; Stanoiu, M ^[6]; Aksouh, F ^[7]; Brown, B A ^[8]; Grigorenko, L V ^[9]

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1. CENBG, Le Haut Vigneau, B.P.120, F-33175 Gradignan Cedex (France)
2. Grand Accelerateur National d'Ions Lourds, B.P.5027, F-14076 Caen Cedex (France)
3. Faculte de Physique, USTHB, B.P.32, El Alia, 16111 Bab Ezzouar, Alger (Algeria)
4. Institute of Atomic Physics, P.O. Box MG6, Bucharest-Margurele (Romania)
5. Departamento de Fisica de Particulas, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela (Spain)
6. Institut de Physique Nucleaire d'Orsay, 15 rue Georges Clemenceau, F-91406 Orsay Cedex (France)
7. Instituut voor Kern- en Stralingsfysica, Celetijnenlaan 200D, B-3001 Leuven (Belgium)
8. Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321 (United States)
9. Flerov Laboratory of Nuclear Reactions, JINR, RU-141980 Dubna (Russian Federation)

In an experiment at the SISSI/LISE3 facility of GANIL, we have studied the decay of the two proton-rich nuclei {sup 45}Fe and {sup 48}Ni. We identified 30 implantations of {sup 45}Fe and observed for the second time four implantation events of {sup 48}Ni. In 17 cases, {sup 45}Fe decays by two-proton emission with a decay energy of 1.154(16) MeV and a half-life of T{sub 1/2}=1.6{sub -0.3}{sup +0.5} ms. The observation of {sup 48}Ni and of its decay allows us to deduce a half-life of T{sub 1/2}=2.1{sub -0.7}{sup +2.1} ms. One out of four decay events is completely compatible with two-proton radioactivity and may therefore indicate that {sup 48}Ni has a two-proton radioactivity branch. We discuss all information now available on two-proton radioactivity for {sup 45}Fe and {sup 48}Ni and compare it to theoretical models.

• OSTI ID: 20699120
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPARATIVE EVALUATIONS
GANIL CYCLOTRON
HALF-LIFE
IRON 45
MEV RANGE
NEUTRON-DEFICIENT ISOTOPES
NICKEL ISOTOPES
PROTON-EMISSION DECAY
PROTONS