The role of shell gaps and deformation-driving orbitals in superdeformed Ce-130

A T Semple; E S Paul; A J Boston; I M Hibbert; D T Joss; P J Nolan; N J O'Brien; C M Parry; S L Shepherd; R Wadsworth; R Wyss

The role of shell gaps and deformation-driving orbitals in superdeformed Ce-130

A T Semple, E S Paul, A J Boston, I M Hibbert, D T Joss, P J Nolan, N J O'Brien, C M Parry, S L Shepherd, R Wadsworth, R Wyss

Physics

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

Abstract

Four superdeformed bands have been assigned to Ce-130 following a high-statistics gamma-ray study using the EUROGAM 11 spectrometer. The bands are interpreted in terms of upsilon 6(1) circle times [411]1/2(+) and upsilon 6(1) circle times [523]7/2(-) signature-partner neutron configurations. One of the bands exhibits a sharp backbend when the upsilon 6(1) orbital crosses the alpha = +1/2 [411]1/2(+) orbital at omega approximate to 0.55 MeV/ h. Below this crossing, the band is predicted to remain superdeformed despite the absence of N = 6 neutron intruders. This suggests that these intruders are not a necessary ingredient of superdeformation in this mass region but that the underlying shell gaps at Z = 58 and N = 72 are important.

Original language	English
Pages (from-to)	1125-1133
Number of pages	9
Journal	Journal of physics g-Nuclear and particle physics
Volume	24
Issue number	6
Publication status	Published - Jun 1998

Keywords

MASS REGION
LIFETIME MEASUREMENTS
BANDS
NUCLEI

Cite this

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title = "The role of shell gaps and deformation-driving orbitals in superdeformed Ce-130",

abstract = "Four superdeformed bands have been assigned to Ce-130 following a high-statistics gamma-ray study using the EUROGAM 11 spectrometer. The bands are interpreted in terms of upsilon 6(1) circle times [411]1/2(+) and upsilon 6(1) circle times [523]7/2(-) signature-partner neutron configurations. One of the bands exhibits a sharp backbend when the upsilon 6(1) orbital crosses the alpha = +1/2 [411]1/2(+) orbital at omega approximate to 0.55 MeV/ h. Below this crossing, the band is predicted to remain superdeformed despite the absence of N = 6 neutron intruders. This suggests that these intruders are not a necessary ingredient of superdeformation in this mass region but that the underlying shell gaps at Z = 58 and N = 72 are important.",

keywords = "MASS REGION, LIFETIME MEASUREMENTS, BANDS, NUCLEI",

author = "Semple, {A T} and Paul, {E S} and Boston, {A J} and Hibbert, {I M} and Joss, {D T} and Nolan, {P J} and O'Brien, {N J} and Parry, {C M} and Shepherd, {S L} and R Wadsworth and R Wyss",

year = "1998",

month = jun,

language = "English",

volume = "24",

pages = "1125--1133",

journal = "Journal of physics g-Nuclear and particle physics",

issn = "0954-3899",

publisher = "IOP Publishing",

number = "6",

}

TY - JOUR

T1 - The role of shell gaps and deformation-driving orbitals in superdeformed Ce-130

AU - Semple, A T

AU - Paul, E S

AU - Boston, A J

AU - Hibbert, I M

AU - Joss, D T

AU - Nolan, P J

AU - O'Brien, N J

AU - Parry, C M

AU - Shepherd, S L

AU - Wadsworth, R

AU - Wyss, R

PY - 1998/6

Y1 - 1998/6

N2 - Four superdeformed bands have been assigned to Ce-130 following a high-statistics gamma-ray study using the EUROGAM 11 spectrometer. The bands are interpreted in terms of upsilon 6(1) circle times [411]1/2(+) and upsilon 6(1) circle times [523]7/2(-) signature-partner neutron configurations. One of the bands exhibits a sharp backbend when the upsilon 6(1) orbital crosses the alpha = +1/2 [411]1/2(+) orbital at omega approximate to 0.55 MeV/ h. Below this crossing, the band is predicted to remain superdeformed despite the absence of N = 6 neutron intruders. This suggests that these intruders are not a necessary ingredient of superdeformation in this mass region but that the underlying shell gaps at Z = 58 and N = 72 are important.

AB - Four superdeformed bands have been assigned to Ce-130 following a high-statistics gamma-ray study using the EUROGAM 11 spectrometer. The bands are interpreted in terms of upsilon 6(1) circle times [411]1/2(+) and upsilon 6(1) circle times [523]7/2(-) signature-partner neutron configurations. One of the bands exhibits a sharp backbend when the upsilon 6(1) orbital crosses the alpha = +1/2 [411]1/2(+) orbital at omega approximate to 0.55 MeV/ h. Below this crossing, the band is predicted to remain superdeformed despite the absence of N = 6 neutron intruders. This suggests that these intruders are not a necessary ingredient of superdeformation in this mass region but that the underlying shell gaps at Z = 58 and N = 72 are important.

KW - MASS REGION

KW - LIFETIME MEASUREMENTS

KW - BANDS

KW - NUCLEI

M3 - Article

SN - 0954-3899

VL - 24

SP - 1125

EP - 1133

JO - Journal of physics g-Nuclear and particle physics

JF - Journal of physics g-Nuclear and particle physics

IS - 6

ER -