Studies of superdeformation in the gadolinium nuclei

B. Haas; V. P. Janzen; D. Ward; H. R. Andrews; D. C. Radford; D. Prévost; J. A. Kuehner; A. Omar; J. C. Waddington; T. E. Drake; A. Galindo-Uribarri; G. Zwartz; S. Flibotte; P. Taras; I. Ragnarsson

doi:10.1016/0375-9474(93)90153-O

Studies of superdeformation in the gadolinium nuclei

B. Haas
, V. P. Janzen
, D. Ward
, H. R. Andrews
, D. C. Radford
, D. Prévost
, J. A. Kuehner
, A. Omar
, J. C. Waddington
, T. E. Drake
, A. Galindo-Uribarri
, G. Zwartz
, S. Flibotte
, P. Taras
, I. Ragnarsson

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

We have used the 8π γ-ray spectrometer at the Chalk River TASCC facility to study superdeformed rotational bands in the chain of isotopes ^145-149Gd. The five bands already known have been extended to higher spin, while four new excited bands have been discovered. The use of very similar reactions, data-acquisition parameters and data-analysis techniques, combined with the enlarged set of data, has allowed us for the first time to approach the topic of superdeformation in the A = 150 mass region from a comprehensive point of view. Transition energies of neighbouring nuclei were compared to extract effective aligned spins of the added particle. Such a comparison requires knowledge of relative nuclear spins, which we have to assume. Nevertheless, we find that a very illustrative picture emerges making it possible to understand all nine bands in the Gd isotopes within a very simple scheme of orbital assignments.

Original language	English
Pages (from-to)	251-284
Number of pages	34
Journal	Nuclear Physics A
Volume	561
Issue number	2
DOIs	https://doi.org/10.1016/0375-9474(93)90153-O
State	Published - Aug 23 1993
Externally published	Yes

Funding

Our colleaguesJ. P. Vivien (Strasbourg)S, . Pilotte (Universityo f Ottawa)a nd H. Kluge (HMI) participatedi n the ‘49Gd experimentsU. ndergraduates tudentsN . Cioran, P. Unrau and M. Sawicki (McMaster University)a ssistedin some experiments. Discussionsw ith Sven Aberg are gratefully acknowledgedT. his work was supportedi n part by the SwedishN atural Science Research Council and by the Natural Sciencea nd EngineeringR esearchC ouncil of Canada.

Keywords

Nuclear reactions

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10.1016/0375-9474(93)90153-O

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title = "Studies of superdeformation in the gadolinium nuclei",

abstract = "We have used the 8π γ-ray spectrometer at the Chalk River TASCC facility to study superdeformed rotational bands in the chain of isotopes 145-149Gd. The five bands already known have been extended to higher spin, while four new excited bands have been discovered. The use of very similar reactions, data-acquisition parameters and data-analysis techniques, combined with the enlarged set of data, has allowed us for the first time to approach the topic of superdeformation in the A = 150 mass region from a comprehensive point of view. Transition energies of neighbouring nuclei were compared to extract effective aligned spins of the added particle. Such a comparison requires knowledge of relative nuclear spins, which we have to assume. Nevertheless, we find that a very illustrative picture emerges making it possible to understand all nine bands in the Gd isotopes within a very simple scheme of orbital assignments.",

keywords = "Nuclear reactions",

author = "B. Haas and Janzen, \{V. P.\} and D. Ward and Andrews, \{H. R.\} and Radford, \{D. C.\} and D. Pr{\'e}vost and Kuehner, \{J. A.\} and A. Omar and Waddington, \{J. C.\} and Drake, \{T. E.\} and A. Galindo-Uribarri and G. Zwartz and S. Flibotte and P. Taras and I. Ragnarsson",

year = "1993",

month = aug,

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doi = "10.1016/0375-9474(93)90153-O",

language = "English",

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pages = "251--284",

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T1 - Studies of superdeformation in the gadolinium nuclei

AU - Haas, B.

AU - Janzen, V. P.

AU - Ward, D.

AU - Andrews, H. R.

AU - Radford, D. C.

AU - Prévost, D.

AU - Kuehner, J. A.

AU - Omar, A.

AU - Waddington, J. C.

AU - Drake, T. E.

AU - Galindo-Uribarri, A.

AU - Zwartz, G.

AU - Flibotte, S.

AU - Taras, P.

AU - Ragnarsson, I.

PY - 1993/8/23

Y1 - 1993/8/23

N2 - We have used the 8π γ-ray spectrometer at the Chalk River TASCC facility to study superdeformed rotational bands in the chain of isotopes 145-149Gd. The five bands already known have been extended to higher spin, while four new excited bands have been discovered. The use of very similar reactions, data-acquisition parameters and data-analysis techniques, combined with the enlarged set of data, has allowed us for the first time to approach the topic of superdeformation in the A = 150 mass region from a comprehensive point of view. Transition energies of neighbouring nuclei were compared to extract effective aligned spins of the added particle. Such a comparison requires knowledge of relative nuclear spins, which we have to assume. Nevertheless, we find that a very illustrative picture emerges making it possible to understand all nine bands in the Gd isotopes within a very simple scheme of orbital assignments.

AB - We have used the 8π γ-ray spectrometer at the Chalk River TASCC facility to study superdeformed rotational bands in the chain of isotopes 145-149Gd. The five bands already known have been extended to higher spin, while four new excited bands have been discovered. The use of very similar reactions, data-acquisition parameters and data-analysis techniques, combined with the enlarged set of data, has allowed us for the first time to approach the topic of superdeformation in the A = 150 mass region from a comprehensive point of view. Transition energies of neighbouring nuclei were compared to extract effective aligned spins of the added particle. Such a comparison requires knowledge of relative nuclear spins, which we have to assume. Nevertheless, we find that a very illustrative picture emerges making it possible to understand all nine bands in the Gd isotopes within a very simple scheme of orbital assignments.

KW - Nuclear reactions

UR - https://www.scopus.com/pages/publications/0001251954

U2 - 10.1016/0375-9474(93)90153-O

DO - 10.1016/0375-9474(93)90153-O

M3 - Article

AN - SCOPUS:0001251954

SN - 0375-9474

VL - 561

SP - 251

EP - 284

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 2

ER -

Studies of superdeformation in the gadolinium nuclei

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Keywords

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