2p radioactivity studied by tracking technique

Journal Article · Tue Jun 01 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3455942· OSTI ID:21362114

Mukha, Ivan ^[1]

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1. CSIC-IFIC Universidad de Valencia, E-46071 Valencia (Spain)

The recent advance in experimental studies of short-lived exotic nuclei beyond the proton drip line is presented. In particular, in-flight decays of proton-unbound nuclei with picosecond lifetimes can be probed by a novel technique which tracks all decay products precisely, and the decay vertices as well as the angular correlations of the fragments are deduced from the measured trajectories. The corresponding pioneering experiment which identified a previously-unknown isotope {sup 19}Mg and its two-proton (2p) radioactivity as well as studied the reference 2p decay of the known isotope {sup 16}Ne is described. Systematic studies of other 2p precursors beyond the proton drip line are foreseen with this powerful technique whose sensitivity is larger by factor of 30 in comparison with a conventional invariant-mass method. The 2p radioactivity candidates {sup 30}Ar, {sup 34}Ca and {sup 26}S are discussed. Information about the respective one-proton unbound nuclei can be obtained with this technique by evaluating proton-heavy-fragment correlations. Systematic studies of nuclei beyond the proton drip line, e.g., the well-known proton resonances above the 'waiting points' in the astrophysical rp-process, {sup 69}Br and {sup 73}Br are feasible.

• OSTI ID: 21362114
• Journal Information: AIP Conference Proceedings, Vol. 1238, Issue 1; Conference: 7. Tours symposium on nuclear physics and astrophysics, Kobe (Japan), 16-20 Nov 2009; Other Information: DOI: 10.1063/1.3455942; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
ARGON 30
ASTROPHYSICS
BROMINE 69
BROMINE 73
CALCIUM 34
DAUGHTER PRODUCTS
MAGNESIUM 19
MONTE CARLO METHOD
NEON 16
NUCLEAR DECAY
PARTICLE TRACKS
PROTONS
RADIOACTIVITY
RESONANCE
ALKALINE EARTH ISOTOPES
ARGON ISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BROMINE ISOTOPES
CALCIUM ISOTOPES
CALCULATION METHODS
CORRELATIONS
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
MAGNESIUM ISOTOPES
MILLISECONDS LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NANOSECONDS LIVING RADIOISOTOPES
NEON ISOTOPES
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PHYSICS
PROTON DECAY RADIOISOTOPES
RADIOISOTOPES