First observation of two-proton radioactivity in 48Ni

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.83.061303· OSTI ID:1017344

Pomorski, M. ^[1]; Pfutzner, M. ^[1]; Dominik, W. ^[1]; Grzywacz, Robert Kazimierz ^[2]; Baumann, T. ^[3]; Berryman, J. S. ^[3]; Czyrkowski, H. ^[1]; Dabrowski, Ryszard ^[4]; Ginter, T. N. ^[3]; Johnson, James W ^[2]; Kaminski, A. ^[5]; Kuzniak, A. ^[6]; Larson, N. ^[3]; Liddick, S. N. ^[3]; Madurga, M ^[6]; Mazzocchi, C. ^[1]; Miernik, K. ^[7]; Miller, D ^[6]; Paulauskas, S. ^[6]; Pereira, J. ^[8] ; Rykaczewski, Krzysztof Piotr ^[2]; Stolz, A. ^[3]; Suchyta, S. ^[3]

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1. University of Warsaw
2. ORNL
3. Michigan State University, East Lansing
4. Warsaw University
5. PAN, Krakow, Poland
6. University of Tennessee, Knoxville (UTK)
7. Oak Ridge National Laboratory (ORNL)
8. National Superconducting Cyclotron Laboratory (NSCL)

The decay of the extremely neutron deficient 48Ni was studied by means of an imaging time projection chamber which allowed the recording of tracks of charged particles. Decays of 6 atoms were observed. Four of them clearly correspond to two-proton radioactivity providing the first direct evidence for this decay mode in 48Ni. Two decays represent -delayed proton emission. The half-life of 48Ni is determined to be T1=2 = 2:1+1:4 0:4 ms.

• Research Organization: Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1017344
• Journal Information: Physical Review C, Journal Name: Physical Review C Journal Issue: 6 Vol. 83; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ATOMS
CHARGED PARTICLES
DECAY
HALF-LIFE
NEUTRONS
PROTONS
RADIOACTIVITY
TIME PROJECTION CHAMBERS