Eur. Phys. J. A 11, 375-377 (2001)

Short Note

-delayed proton decays of ⁹³Pd and ⁹²Rh

S.-W. Xu, Z.-K. Li, Y.-X. Xie, X.-D. Wang, B. Guo, C.-G. Leng and Y. Yu

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, PRC

xsw@ns.lzb.ac.cn

(Received: 13 April 2001 / Revised version: 16 August 2001 Communicated by J. Äystö )

Abstract
-delayed proton precursors ⁹³Pd and ⁹²Rh were produced by the irradiation of ⁵⁸Ni with a ⁴⁰Ca beam, and identified using proton-gamma coincidence measurements in combination with a helium-jet fast tape transport system. The half-lives of ⁹³Pd and ⁹²Rh were determined to be 1.3(2), 3.0(8) s, respectively. The measured energy spectrum of -delayed protons and the estimated relative branching ratios to the final states in the daughter nuclei were fitted by a statistic model calculation, and then the ground-state spin and parity of ⁹³Pd were assigned as 9/2.

PACS
23.40.-s - Beta decay; double beta decay; electron and muon capture.
21.10.Tg - Lifetimes.
27.60.+j - .

© Società Italiana di Fisica, Springer-Verlag 2001