Direct Observation of Two Protons in the Decay of {sup 54}Zn

Journal Article · Fri Sep 02 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.107.102502· OSTI ID:21611570

Ascher, P; Audirac, L; Blank, B; Delalee, F; Demonchy, C E; Giovinazzo, J; Grevy, S; Kurtukian-Nieto, T; Leblanc, S; Pedroza, J -L; Pibernat, J; Serani, L ^[1]; Adimi, N ^[1]; Borcea, C; Companis, I ^[2]; Brown, B A ^[3]; Oliveira Santos, F de; Perrot, L; Thomas, J -C ^[4]; Grigorenko, L V ^[5]

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1. Centre d'Etudes Nucleaires de Bordeaux Gradignan--Universite Bordeaux 1--UMR 5797 CNRS/IN2P3, Chemin du Solarium, BP 120, 33175 Gradignan (France)
2. National Institute for Physics and Nuclear Engineering, P.O. Box MG6, Bucharest-Margurele (Romania)
3. Department of Physics and Astronomy, and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321 (United States)
4. Grand Accelerateur National d'Ions Lourds, CEA/DSM-CNRS/IN2P3, 14076 Caen Cedex 05 (France)
5. Flerov Laboratory of Nuclear Reactions, JINR, Dubna 141980 (Russian Federation)

The two protons emitted in the decay of {sup 54}Zn have been individually observed for the first time in a time projection chamber. The total decay energy and the half-life measured in this work agree with the results obtained in a previous experiment. Angular and energy correlations between the two protons are determined and compared to theoretical distributions of a three-body model. Within the shell model framework, the relative decay probabilities show a strong contribution of the p{sup 2} configuration for the two-proton emission. After {sup 45}Fe, the present result on {sup 54}Zn constitutes only the second case of a direct observation of the ground state two-proton decay of a long-lived isotope.

• OSTI ID: 21611570
• Journal Information: Physical Review Letters, Vol. 107, Issue 10; Other Information: DOI: 10.1103/PhysRevLett.107.102502; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
GROUND STATES
HALF-LIFE
IRON 45
PROBABILITY
PROTON-EMISSION DECAY
PROTONS
SHELL MODELS
THREE-BODY PROBLEM
TIME PROJECTION CHAMBERS
ZINC 54
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DECAY
DRIFT CHAMBERS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
IRON ISOTOPES
ISOTOPES
MANY-BODY PROBLEM
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MILLISECONDS LIVING RADIOISOTOPES
MULTIWIRE PROPORTIONAL CHAMBERS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEI
NUCLEONS
PROPORTIONAL COUNTERS
PROTON DECAY RADIOISOTOPES
RADIATION DETECTORS
RADIOISOTOPES
ZINC ISOTOPES