Evidence for “Magnetic Rotation” in Nuclei: Lifetimes of States in the <i>M</i>1 bands of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>1</mn><mn>9</mn><mn>8</mn><mo>,</mo><mn>1</mn><mn>9</mn><mn>9</mn></mrow></msup></mrow></math></span>Pb

R. M. Clark; S. J. Asztalos; G. Baldsiefen; J. A. Becker; L. Bernstein; M. A. Deleplanque; R. M. Diamond; P. Fallon; I. M. Hibbert; H. Hübel; R. Krücken; I. Y. Lee; A. O. Macchiavelli; R. W. MacLeod; G. Schmid; F. S. Stephens; K. Vetter; R. Wadsworth; S. Frauendorf

doi:10.1103/PhysRevLett.78.1868

Evidence for “Magnetic Rotation” in Nuclei: Lifetimes of States in the M1 bands of $^{198, 199}$ Pb

R. M. Clark, S. J. Asztalos, G. Baldsiefen, J. A. Becker, L. Bernstein, M. A. Deleplanque, R. M. Diamond, P. Fallon, I. M. Hibbert, H. Hübel, R. Krücken, I. Y. Lee, A. O. Macchiavelli, R. W. MacLeod, G. Schmid, F. S. Stephens, K. Vetter, R. Wadsworth, and S. Frauendorf

Phys. Rev. Lett. 78, 1868 – Published 10 March 1997

Abstract

Lifetimes of states in four of the $M 1$ bands in $^{198, 199} Pb$ have been determined through a Doppler-shift attenuation method measurement performed using the Gammasphere array. The deduced $B (M 1)$ values, which are a sensitive probe of the underlying mechanism for generating these sequences, show remarkable agreement with tilted axis cranking (TAC) calculations. The results represent clear evidence for a new concept in nuclear excitations: “magnetic rotation.”

Received 20 August 1996

DOI:https://doi.org/10.1103/PhysRevLett.78.1868

Authors & Affiliations

R. M. Clark¹, S. J. Asztalos¹, G. Baldsiefen², J. A. Becker³, L. Bernstein³, M. A. Deleplanque¹, R. M. Diamond¹, P. Fallon¹, I. M. Hibbert⁴, H. Hübel², R. Krücken¹, I. Y. Lee¹, A. O. Macchiavelli¹, R. W. MacLeod¹, G. Schmid¹, F. S. Stephens¹, K. Vetter¹, R. Wadsworth⁴, and S. Frauendorf⁵

¹Lawrence Berkeley Laboratory, Berkeley, California 94720
²Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16 D-53115 Bonn, Germany
³Lawrence Livermore National Laboratory, Livermore, California 94550
⁴Department of Physics, University of York, Heslington, York, YO1 5DD, United Kingdom
⁵Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, PF 510119, D-01314 Dresden, Germany