Second Discontinuity in the Yrast Levels of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Er</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>158</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

I. Y. Lee; M. M. Aleonard; M. A. Deleplanque; Y. El-Masri; J. O. Newton; R. S. Simon; R. M. Diamond; F. S. Stephens

doi:10.1103/PhysRevLett.38.1454

Second Discontinuity in the Yrast Levels of ${}^{158}{Er}$

I. Y. Lee, M. M. Aleonard, M. A. Deleplanque, Y. El-Masri, J. O. Newton, R. S. Simon, R. M. Diamond, and F. S. Stephens

Phys. Rev. Lett. 38, 1454 – Published 20 June 1977

Abstract

Discrete yrast transitions from states with spins up to $30 ℏ$ have been observed in ${}^{158}{Er}$ from ${}^{40}{Ar}$ -induced compound-nucleus reactions. A second discontinuity in the level sequence occurs around $I = 28 ℏ$ . Possible causes and implications of this effect are discussed.

Received 13 April 1977

DOI:https://doi.org/10.1103/PhysRevLett.38.1454

Authors & Affiliations

I. Y. Lee, M. M. Aleonard^*, M. A. Deleplanque^†, Y. El-Masri^‡, J. O. Newton^§, R. S. Simon^∥, R. M. Diamond, and F. S. Stephens

Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

^*On leave from Centre d'Etudes Nucléaires de Bordeaux-Gradignan, Domaine du Haut-Vigneau, 33170 Gradignan, France.
^†On leave from Institut de Physique Nucléaire, 91406 Orsay, France; supported by Centre National de la Recherche Scientifique and National Science Foundation.
^‡On leave from Institut de Physique Corpusculaire, B-1348 Louvain-la-Neuve, Belgium.
^§Present address: The Australian National University, Canberra, Australia Capital Territory, 2600 Australia.
^∥Present address: Gesellschaft für Schwerionenforschung, Darmstadt, Germany.