Abstract

OLIVEIRA, J.R.B. et al. High-K band in ¹⁴⁰Gd. Braz. J. Phys. [online]. 2006, vol.36, n.4b, pp. 1371-1374. ISSN 0103-9733.  http://dx.doi.org/10.1590/S0103-97332006000800008.

High-spin states in the neutron-deficient¹⁴⁰Gd nucleus have been studied with the ⁹²Mo(⁵⁴Fe,a2p) reaction at a beam energy of 240 MeV. The level scheme of ¹⁴⁰Gd was considerably extended from what was previously known. In this work we concentrate on one of the 9 bands observed, which presents relatively strong M1 transitions and negligible signature splitting, and has an isomeric band-head, indicating a strongly coupled or high-K configuration. We compare this band to the K^p = 8^- bands observed in N=74 isotones and propose a similar configuration assignment, but with a somewhat larger deformation.

Keywords : Nuclear reactions; ⁹²Mo(⁵⁴Fe, a2p), E=240 MeV; Measured E_g, I_g, gg-coincidence; ¹⁴⁰Gd deduced high-spin levels, J, p, configurations; Isomer.