Gaps in the yrast level structure of the N=50 isotones <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Tc</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>93</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ru</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>94</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Rh</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>95</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> at high angular momentum

H. A. Roth; S. E. Arnell; D. Foltescu; Ö. Skeppstedt; J. Blomqvist; A. Nilsson; T. Kuroyanagi; S. Mitarai; J. Nyberg

doi:10.1103/PhysRevC.50.1330

Gaps in the yrast level structure of the N=50 isotones ${}^{93}{Tc}$ , ${}^{94}{Ru}$ , and ${}^{95}{Rh}$ at high angular momentum

H. A. Roth, S. E. Arnell, D. Foltescu, Ö. Skeppstedt, J. Blomqvist, A. Nilsson, T. Kuroyanagi, S. Mitarai, and J. Nyberg

Phys. Rev. C 50, 1330 – Published 1 September 1994

Abstract

The projectile-target system ${}^{40}{Ca}$ $+^{58}$ Ni has been used to produce the neutron deficient N=50 isotones ${}^{93}{Tc}$ , ${}^{94}{Ru}$ , and ${}^{95}{Rh}$ at high angular momentum. The multidetector array NORDBALL including particle selection was used. A large number of new levels were found in all three nuclei. Most of them can be interpreted as states with a neutron particle-hole excitation across the N=50 shell gap, coupled to lower valence-proton configurations. Some of the observed levels above 11 MeV probably correspond to states with two neutrons excited across the shell gap.