Eur. Phys. J. A (2007) 32: 149-158
https://doi.org/10.1140/epja/i2007-10382-9

Regular Article - Nuclear Structure and Reactions

Decay of 1.643 h ⁹⁵Ru and its daughter's level structure

¹ School of Physics, Peking University, 100871, Beijing, China
² School of Nuclear Engineering and Technology, East China Institute of Technology, Fuzhou 344000, Jiangxi, China
³ CCAST (World Lab.), P.O. Box 8730, 100080, Beijing, China
⁴ Shanghai Institute of Applied Physics, The Chinese Academy of Sciences, 201800, Shanghai, China

Received: 10 April 2007
Accepted: 23 April 2007
Published online: 21 May 2007

Abstract

Abstract.: The decay of ⁹⁵Ru has been investigated by means of γ-ray spectroscopy. The ⁹⁵Ru nuclei were produced by the reaction ⁹²Mo( α, n) ⁹⁵Ru at a beam energy of 17MeV. High-purity Ge detectors have been used singly and in coincidence to study γ-rays in the decay of ⁹⁵Ru to ⁹⁵Tc. 132 γ-rays are reported, among them, energies and intensities for 127 transitions have been determined. A decay scheme of ⁹⁵Ru with 31 levels is proposed which accommodates 127 of these transitions. Spins and parities for three new levels are proposed from calculated log ft values, measured γ-ray branching ratios, and in-beam experiment results of the daughter nucleus ⁹⁵Tc. Combining with the high-spin states observed by in-beam γ-ray spectroscopy of previous decay works, the structure of the excited states of ⁹⁵Tc is discussed in the framework of the projected shell model.