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Title: Return of Collective Rotation in {sup 157}Er and {sup 158}Er at Ultrahigh Spin

Abstract

A new frontier of discrete-line {gamma}-ray spectroscopy at ultrahigh spin has been opened in the rare-earth nuclei {sup 157,158}Er. Four rotational structures, displaying high moments of inertia, have been identified, which extend up to spin {approx}65({Dirac_h}/2{pi}) and bypass the band-terminating states in these nuclei which occur at {approx}45({Dirac_h}/2{pi}). Cranked Nilsson-Strutinsky calculations suggest that these structures arise from well-deformed triaxial configurations that lie in a valley of favored shell energy which also includes the triaxial strongly deformed bands in {sup 161-167}Lu.

Authors:
; ; ; ;  [1]; ; ;  [2]; ; ;  [3]; ; ; ; ; ; ;  [4];  [5]
  1. Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
  2. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
  3. CCLRC Daresbury Laboratory, Daresbury, Warrington WA4 4AD (United Kingdom)
  4. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  5. Department of Mathematical Physics, Lund Institute of Technology, P.O. Box 118, S-22100 Lund (Sweden)
Publication Date:
OSTI Identifier:
20861577
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 98; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevLett.98.012501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; DEFORMED NUCLEI; ERBIUM 157; ERBIUM 158; GAMMA SPECTROSCOPY; LUTETIUM 161; LUTETIUM 162; LUTETIUM 163; LUTETIUM 164; LUTETIUM 165; LUTETIUM 166; LUTETIUM 167; MOMENT OF INERTIA; SPIN

Citation Formats

Paul, E S, Twin, P J, Evans, A O, Choy, P T. W., Nolan, P J, Pipidis, A, Riley, M A, Campbell, D B, Simpson, J, Appelbe, D E, Joss, D T, Clark, R M, Cromaz, M, Fallon, P, Goergen, A, Lee, I Y, Macchiavelli, A O, Ward, D, and Ragnarsson, I. Return of Collective Rotation in {sup 157}Er and {sup 158}Er at Ultrahigh Spin. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.012501.
Paul, E S, Twin, P J, Evans, A O, Choy, P T. W., Nolan, P J, Pipidis, A, Riley, M A, Campbell, D B, Simpson, J, Appelbe, D E, Joss, D T, Clark, R M, Cromaz, M, Fallon, P, Goergen, A, Lee, I Y, Macchiavelli, A O, Ward, D, & Ragnarsson, I. Return of Collective Rotation in {sup 157}Er and {sup 158}Er at Ultrahigh Spin. United States. https://doi.org/10.1103/PHYSREVLETT.98.012501
Paul, E S, Twin, P J, Evans, A O, Choy, P T. W., Nolan, P J, Pipidis, A, Riley, M A, Campbell, D B, Simpson, J, Appelbe, D E, Joss, D T, Clark, R M, Cromaz, M, Fallon, P, Goergen, A, Lee, I Y, Macchiavelli, A O, Ward, D, and Ragnarsson, I. Fri . "Return of Collective Rotation in {sup 157}Er and {sup 158}Er at Ultrahigh Spin". United States. https://doi.org/10.1103/PHYSREVLETT.98.012501.
@article{osti_20861577,
title = {Return of Collective Rotation in {sup 157}Er and {sup 158}Er at Ultrahigh Spin},
author = {Paul, E S and Twin, P J and Evans, A O and Choy, P T. W. and Nolan, P J and Pipidis, A and Riley, M A and Campbell, D B and Simpson, J and Appelbe, D E and Joss, D T and Clark, R M and Cromaz, M and Fallon, P and Goergen, A and Lee, I Y and Macchiavelli, A O and Ward, D and Ragnarsson, I},
abstractNote = {A new frontier of discrete-line {gamma}-ray spectroscopy at ultrahigh spin has been opened in the rare-earth nuclei {sup 157,158}Er. Four rotational structures, displaying high moments of inertia, have been identified, which extend up to spin {approx}65({Dirac_h}/2{pi}) and bypass the band-terminating states in these nuclei which occur at {approx}45({Dirac_h}/2{pi}). Cranked Nilsson-Strutinsky calculations suggest that these structures arise from well-deformed triaxial configurations that lie in a valley of favored shell energy which also includes the triaxial strongly deformed bands in {sup 161-167}Lu.},
doi = {10.1103/PHYSREVLETT.98.012501},
url = {https://www.osti.gov/biblio/20861577}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 1,
volume = 98,
place = {United States},
year = {2007},
month = {1}
}