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- Title
First decay study of the new isotope <sup>129</sup>Pm near the proton drip line.
- Authors
Xu, S.-W.; Xie, Y.-X.; Xu, F.-R.; Li, Z.-K.; Wang, X.-D.
- Abstract
The very neutron-deficient nuclide 129Pm was produced via the 92Mo(40Ca, p2n) reaction and identified for the first time by using the X-γ coincidence in combination with a He jet tape transport system. According to the decay curve of a 99 keV γ-ray which corresponds to the known &frac52; → ½ transition in the daughter nucleus 129Nd of the 129Pm decay, the half-life of 129Pm was determined to be 2.4(9) s. Based on the nuclear potential energy surface (PES) calculations, the ground-state spin-parity of 129Pm was predicted as &frac52; which is favorable to feed a &frac52; low-lying state in the daughter nucleus 129Nd via the (EC 1β+) decay.
- Subjects
PARTICLES (Nuclear physics); COINCIDENCE; ANNIHILATION reactions; NUCLEAR physics; FLUIDS; TRANSPORTATION; POTENTIAL energy surfaces; QUANTUM chemistry
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2004, Vol 21, Issue 1, p75
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/i2003-10190-3