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Title: Ultra-High Spin Spectroscopy In Er Nuclei

Abstract

The discoveries observed in the ongoing conflict between collective and single-particle nuclear behaviour with increasing angular momentum have driven the field of nuclear spectroscopy for many decades and have given rise to new nuclear phenomena. Recently a new frontier of {gamma} spectroscopy at ultra-high spin has been opened in the rare-earth region with rotational bands that bypass the classic band-terminating states that appear at spin 45({Dirac_h}/2{pi}) in the N 90 Er nuclei. These weakly populated rotational structures have characteristics of triaxial strongly-deformed bands. Such structures have been observed in {sup 157,158,160}Er, following a series of experiments using the Gammasphere spectrometer. These observations herald a return to collective excitations at spins of about 50 to 65({Dirac_h}/2{pi}). This talk reviews the status of the spectroscopy and understanding of the observed structures in these Er and neighbouring nuclei.

Authors:
 [1]
  1. STFC Daresbury Laboratory, Warrington, WA4 4AD (United Kingdom)
Publication Date:
OSTI Identifier:
21254792
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1072; Journal Issue: 1; Conference: International conference on nuclear physics and astrophysics: From stable beams to exotic nuclei, Cappadocia (Turkey), 25-30 Jun 2008; Other Information: DOI: 10.1063/1.3039816; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COLLECTIVE EXCITATIONS; ERBIUM 157; ERBIUM 158; ERBIUM 160; GAMMA SPECTROSCOPY; NUCLEAR REACTIONS; RARE EARTHS; ROTATIONAL STATES; SCATTERING; SPECTROMETERS; SPIN

Citation Formats

Simpson, J. Ultra-High Spin Spectroscopy In Er Nuclei. United States: N. p., 2008. Web. doi:10.1063/1.3039816.
Simpson, J. Ultra-High Spin Spectroscopy In Er Nuclei. United States. https://doi.org/10.1063/1.3039816
Simpson, J. 2008. "Ultra-High Spin Spectroscopy In Er Nuclei". United States. https://doi.org/10.1063/1.3039816.
@article{osti_21254792,
title = {Ultra-High Spin Spectroscopy In Er Nuclei},
author = {Simpson, J},
abstractNote = {The discoveries observed in the ongoing conflict between collective and single-particle nuclear behaviour with increasing angular momentum have driven the field of nuclear spectroscopy for many decades and have given rise to new nuclear phenomena. Recently a new frontier of {gamma} spectroscopy at ultra-high spin has been opened in the rare-earth region with rotational bands that bypass the classic band-terminating states that appear at spin 45({Dirac_h}/2{pi}) in the N 90 Er nuclei. These weakly populated rotational structures have characteristics of triaxial strongly-deformed bands. Such structures have been observed in {sup 157,158,160}Er, following a series of experiments using the Gammasphere spectrometer. These observations herald a return to collective excitations at spins of about 50 to 65({Dirac_h}/2{pi}). This talk reviews the status of the spectroscopy and understanding of the observed structures in these Er and neighbouring nuclei.},
doi = {10.1063/1.3039816},
url = {https://www.osti.gov/biblio/21254792}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1072,
place = {United States},
year = {Tue Nov 11 00:00:00 EST 2008},
month = {Tue Nov 11 00:00:00 EST 2008}
}