Longitudinal Wobbling Motion in $^{187}\mathrm{Au}$

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Longitudinal Wobbling Motion in ${}^{187}{Au}$

N. Sensharma, U. Garg, Q. B. Chen, S. Frauendorf, D. P. Burdette, J. L. Cozzi, K. B. Howard, S. Zhu, M. P. Carpenter, P. Copp, F. G. Kondev, T. Lauritsen, J. Li, D. Seweryniak, J. Wu, A. D. Ayangeakaa, D. J. Hartley, R. V. F. Janssens, A. M. Forney, W. B. Walters, S. S. Ghugre, and R. Palit

Phys. Rev. Lett. 124, 052501 – Published 5 February 2020

See Synopsis: Gold Nucleus is Wobbly

Abstract

The rare phenomenon of nuclear wobbling motion has been investigated in the nucleus ${}^{187}{Au}$ . A longitudinal wobbling-bands pair has been identified and clearly distinguished from the associated signature-partner band on the basis of angular distribution measurements. Theoretical calculations in the framework of the particle rotor model are found to agree well with the experimental observations. This is the first experimental evidence for longitudinal wobbling bands where the expected signature partner band has also been identified, and establishes this exotic collective mode as a general phenomenon over the nuclear chart.

Received 30 May 2019
Revised 23 September 2019
Accepted 16 December 2019

DOI:https://doi.org/10.1103/PhysRevLett.124.052501

Physics Subject Headings (PhySH)

Collective levels Nuclear structure & decays

150 ≤ A ≤ 189

Collective models Nuclear density functional theory

Nuclear Physics

Synopsis

Gold Nucleus is Wobbly

Published 5 February 2020

A rare kind of nuclear spinning motion has been detected in an isotope of gold.

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Authors & Affiliations

N. Sensharma¹, U. Garg¹, Q. B. Chen², S. Frauendorf¹, D. P. Burdette¹, J. L. Cozzi¹, K. B. Howard¹, S. Zhu¹⁰, M. P. Carpenter³, P. Copp³, F. G. Kondev³, T. Lauritsen³, J. Li³, D. Seweryniak³, J. Wu³, A. D. Ayangeakaa⁴, D. J. Hartley⁴, R. V. F. Janssens^5,6, A. M. Forney⁷, W. B. Walters⁷, S. S. Ghugre⁸, and R. Palit⁹

¹Physics Department, University of Notre Dame, Notre Dame, Indiana 46556, USA
²Physik-Department, Technische Universität München, D-85747 Garching, Germany
³Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
⁴Department of Physics, United States Naval Academy, Annapolis, Maryland 21402, USA
⁵Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
⁶Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA
⁷Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
⁸UGC-DAE Consortium for Scientific Research, Kolkata 700 064, India
⁹Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400 005, India
¹⁰National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973, USA