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The giant resonance and the shape of hot nuclei

Abstract

The gamma decay of the giant dipole resonance is a sensitive tool for investigating how nuclear shape changes with spin and excitation energy, but the information is coded in a subtle way, inasmuch as the shape and orientation of nuclei at finite temperature display large fluctuations. At the time of the conference, the three systems {sup 109-110}Sn, {sup 161-162}Yb and {sup 165-167}Er had recently been studied on the HECTOR spectrometer. The Sn nuclei are spherical in their ground states, and are expected to become oblate under the stress of rotation. The Yb and Er nuclei are prolate, and are expected to become first spherical, then oblate. While the patterns of the measured angular anisotropies are consistent with this general picture, many questions still remain open. 3 refs., 1 tab., 3 figs.
Authors:
Bracco, A; Camera, F; Million, B; Pignanelli, M; [1]  Gaardhoje, J J; Maj, A; Atac, A [2] 
  1. Milan Univ. (Italy). Ist. di Fisica
  2. Niels Bohr Inst., Copenhagen (Denmark)
Publication Date:
Aug 01, 1992
Product Type:
Conference
Report Number:
AECL-10613(v.2); CONF-920548-; CONF-9205444-
Reference Number:
SCA: 663110; 663220; PA: AIX-28:057800; EDB-97:122496; SN: 97001841923
Resource Relation:
Conference: Workshop on large gamma-ray detector arrays, Ottawa (Canada); Chalk River (Canada), 18-23 May 1992; 19-23 May 1992; Other Information: PBD: Aug 1992; Related Information: Is Part Of Proceedings of the international conference on nuclear structure at high angular momentum and the workshop on large gamma-ray detector arrays; PB: 500 p.
Subject:
66 PHYSICS; GIANT RESONANCE; DEFORMED NUCLEI; HOT NUCLEI; SHAPE; ANGULAR DISTRIBUTION; ANGULAR MOMENTUM; DIPOLES; ERBIUM 165; ERBIUM 166; ERBIUM 167; E1-TRANSITIONS; FLUCTUATIONS; GAMMA SPECTROSCOPY; HIGH SPIN STATES; NUCLEAR DEFORMATION; ROTATIONAL STATES; TIN 109; TIN 110; YTTERBIUM 162
OSTI ID:
520561
Research Organizations:
Atomic Energy of Canada Ltd., Chalk River, ON (Canada). Chalk River Nuclear Labs.
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
Other: ON: DE97638960; TRN: CA9700463057800
Availability:
INIS; OSTI as DE97638960
Submitting Site:
INIS
Size:
pp. 76-80
Announcement Date:

Citation Formats

Bracco, A, Camera, F, Million, B, Pignanelli, M, Gaardhoje, J J, Maj, A, and Atac, A. The giant resonance and the shape of hot nuclei. Canada: N. p., 1992. Web.
Bracco, A, Camera, F, Million, B, Pignanelli, M, Gaardhoje, J J, Maj, A, & Atac, A. The giant resonance and the shape of hot nuclei. Canada.
Bracco, A, Camera, F, Million, B, Pignanelli, M, Gaardhoje, J J, Maj, A, and Atac, A. 1992. "The giant resonance and the shape of hot nuclei." Canada.
@misc{etde_520561,
title = {The giant resonance and the shape of hot nuclei}
author = {Bracco, A, Camera, F, Million, B, Pignanelli, M, Gaardhoje, J J, Maj, A, and Atac, A}
abstractNote = {The gamma decay of the giant dipole resonance is a sensitive tool for investigating how nuclear shape changes with spin and excitation energy, but the information is coded in a subtle way, inasmuch as the shape and orientation of nuclei at finite temperature display large fluctuations. At the time of the conference, the three systems {sup 109-110}Sn, {sup 161-162}Yb and {sup 165-167}Er had recently been studied on the HECTOR spectrometer. The Sn nuclei are spherical in their ground states, and are expected to become oblate under the stress of rotation. The Yb and Er nuclei are prolate, and are expected to become first spherical, then oblate. While the patterns of the measured angular anisotropies are consistent with this general picture, many questions still remain open. 3 refs., 1 tab., 3 figs.}
place = {Canada}
year = {1992}
month = {Aug}
}