Two-quasiparticle states in 168Er

Abstract

The level structure of 16BEr and the de-excitation mechanism in this nucleus have been studied by radiative capture of thermal neutrons in sampies of natural erbium which give a cross-section contribution of 89.8±2.3 % for 167Er. Interference from the 9.q=2.1 %capture contribution of 166Er was welI known from aseparate study with enriched 166Er sampies. Highresolution measurements of they-ray spectrum have been performed using the Karlsruhe Ge(Li) anti-Compton spectrometer below 2 MeV and a Ge(Li) double-escape spectrometer above 5.

Kdependence in the gamma decay of neutron resonances inEr168andHf

“…1636 keV. -Two transitions to (4+,0) and (5,5) states give this peak with a total intensity of 122. The average intensity of transitions to 5 states cannot be determined directly due to the lack of resolvable transitions.…”

“…[5] are inconsistent. We have taken the lowest value [5]. 'The intensity is represented by an upper limit.…”

“…[4] and Ref. [5], with two exceptions. The transitions to the 4 (0) level at E"=1411keV and to the 4 (3) level at E"=1615keV are both reported in Ref.…”

“…We adopt the energy-corrected intensities given by Refs. [4,5,7], where the intensity is assumed to be proportional to Ez.…”

Study of Multiphonon γγ-band of 154Gd through Modified Soft Rotor Formula

“…Few experimentalist [5] argued that the hexadecapole excitations may resemble the properties of multiphonon vibrations. Later, the multiphonon bands in few deformed nuclei were noticed [6][7][8][9]. However, the experimental confirmation over these nuclear structures was not presented.…”