2020 Impact factor 3.043
Hadrons and Nuclei
Eur. Phys. J. A 15, 81-84 (2002)
DOI: 10.1140/epja/i2001-10230-0

New experimental results in proton radioactivity

K.P. Rykaczewski

Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA and Institute of Experimental Physics, Warsaw University, Pl-00681 Warsaw, Poland

rykaczew@phy.ornl.gov

(Received: 21 March 2002 / Published online: 31 October 2002)

Abstract
A review of experimental data obtained recently on proton-radioactive nuclei is presented. The highlights include the observation of fine structure in proton emission, for the decays of $\chem{^{131}Eu}$, $\chem{^{145}Tm}$ and $\chem{^{146}Tm}$, and the studies of the excited states in proton-emitting nuclei. The observation limits are extended to few nanobarns cross-sections ( $\chem{^{140}Ho}$, $\chem{^{164}Ir}$ and $\chem{^{130}Eu}$) and few microsecond half-lives (e.g., $\chem{^{145}Tm}$). Measured decay properties for thirty-nine proton-emitting ground and isomeric states contributed to the understanding of nuclear masses and evolution of single-particle states at and beyond the proton drip line. Experimental results have stimulated new theoretical approaches to proton emission and the structure of unbound narrow resonance states.

PACS
23.50.+z - Decay by proton emission.
21.10.-k - Properties of nuclei; nuclear energy levels.

© Società Italiana di Fisica, Springer-Verlag 2002