First Observation of the Scissors Mode in a <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">γ</mi></math></span>-Soft Nucleus: The Case of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>196</mn></mrow></msup></mrow></math></span>Pt

P. von Brentano; J. Eberth; J. Enders; L. Esser; R.-D. Herzberg; N. Huxel; H. Meise; P. von Neumann-Cosel; N. Nicolay; N. Pietralla; H. Prade; J. Reif; A. Richter; C. Schlegel; R. Schwengner; S. Skoda; H. G. Thomas; I. Wiedenhöver; G. Winter; A. Zilges

doi:10.1103/PhysRevLett.76.2029

First Observation of the Scissors Mode in a $γ$ -Soft Nucleus: The Case of $^{196}$ Pt

P. von Brentano, J. Eberth, J. Enders, L. Esser, R.-D. Herzberg, N. Huxel, H. Meise, P. von Neumann-Cosel, N. Nicolay, N. Pietralla, H. Prade, J. Reif, A. Richter, C. Schlegel, R. Schwengner, S. Skoda, H. G. Thomas, I. Wiedenhöver, G. Winter, and A. Zilges

Phys. Rev. Lett. 76, 2029 – Published 18 March 1996

Abstract

A nuclear resonance fluorescence experiment with one of the newly developed highly efficient EUROBALL cluster detectors has been performed on the $γ$ -soft nucleus $^{196} Pt$ . Magnetic dipole excitations were observed between 2 and 3.5 MeV excitation energy. They are interpreted as the main fragments of the scissors mode based on the measured excitation strengths and branching ratios. A strong $γ$ decay, which we believe to be an $E 2$ decay of the scissors mode to the $2_{1}^{+}$ state, is observed. It allows an extraction of the effective boson quadrupole charges in the interacting boson model.

Received 13 November 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.2029

Authors & Affiliations

P. von Brentano¹, J. Eberth¹, J. Enders², L. Esser¹, R.-D. Herzberg¹, N. Huxel², H. Meise¹, P. von Neumann-Cosel², N. Nicolay¹, N. Pietralla¹, H. Prade³, J. Reif³, A. Richter², C. Schlegel², R. Schwengner³, S. Skoda³, H. G. Thomas¹, I. Wiedenhöver¹, G. Winter³, and A. Zilges¹

¹Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
²Institut für Kernphysik, Technische Hochschule Darmstadt, D-64289 Darmstadt, Germany
³Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, D-01314 Dresden, Germany