Structure in the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>E</mi><mn>2</mn><mn></mn></math></span> Quasicontinuum Spectrum of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Dy</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>154</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

R. Holzmann; T. L. Khoo; W. C. Ma; I. Ahmad; B. K. Dichter; H. Emling; R. V. F. Janssens; M. W. Drigert; U. Garg; M. A. Quader; P. J. Daly; M. Piiparinen; W. Trzaska

doi:10.1103/PhysRevLett.62.520

Structure in the $E 2$ Quasicontinuum Spectrum of ${}^{154}{Dy}$

R. Holzmann, T. L. Khoo, W. C. Ma, I. Ahmad, B. K. Dichter, H. Emling, R. V. F. Janssens, M. W. Drigert, U. Garg, M. A. Quader, P. J. Daly, M. Piiparinen, and W. Trzaska

Phys. Rev. Lett. 62, 520 – Published 30 January 1989

Abstract

The evolution of the $γ$ quasicontinuum spectrum with neutron number has been investigated in the sequence of isotopes ${}^{152, 154, 156}{Dy}$ . The three nuclei display a pronounced collective $E 2$ component. In ${}^{154}{Dy}$ this component shows a splitting into two distinct parts, signifying a structural change along the $γ$ cascade above the yrast line. The $E 2$ and statistical components are reproduced in simple $γ$ -cascade calculations; in ${}^{152}{Dy}$ and ${}^{156}{Dy}$ only rotational bands are included, whereas in ${}^{154}{Dy}$ additional vibration-like transitions are required to reproduce the two $E 2$ peaks.

Received 18 May 1988

DOI:https://doi.org/10.1103/PhysRevLett.62.520

Authors & Affiliations

R. Holzmann^*, T. L. Khoo, W. C. Ma^†, I. Ahmad, B. K. Dichter^‡, H. Emling^*, and R. V. F. Janssens

Argonne National Laboratory, Argonne, Illinois 60439

M. W. Drigert^§ and U. Garg

University of Notre Dame, Notre Dame, Indiana 46556

M. A. Quader, P. J. Daly, M. Piiparinen^∥, and W. Trzaska^∥

Purdue University, West Lafayette, Indiana 47907

^*Present address: Gesellschaft für Schwerionenforschung Darmstadt m.b.H., Darmstadt, D-6100, West Germany.
^†Present address: Tsinghua University, Beijing, People's Republic of China.
^‡Present address: Panametrics Inc., Waltham, MA 02254.
^§Present address: Idaho National Engineering Laboratory, Idaho Falls, ID 83415.
^∥Present address: University of Jyväskylä, Jyväskylä, SF-40720, Finland.