Shape coexistence in light krypton isotopes

E. Clément; A. Görgen; E. Bouchez; A. Chatillon; W. Korten; Y. Le Coz; Ch Theisen; C. Andreoiu; F. Becker; B. Blank; C. Borcea; A. Buta; P. Butler; J. M. Casandjian; W. N. Catford; T. Czosnyka; A. Emsallem; G. De France; J. Genevey; J. Gerl; F. Hannachi; K. Hauschild; R. D. Herzberg; A. Hürstel; J. Iwanicki; D. Jenkins; G. Jones; M. Lewitowicz; R. Lucas; I. Matea; F. Negoita; F. De Oliviera Santos; D. Pantelica; J. Pinston; P. Rahkila; M. Rejmund; G. Sletten; M. Stanoiu; C. Timis; R. Wadsworth; J. N. Wilson; M. Zielińska

doi:10.1063/1.1905291

Shape coexistence in light krypton isotopes

E. Clément^*, A. Görgen, E. Bouchez, A. Chatillon, W. Korten, Y. Le Coz, Ch Theisen, C. Andreoiu, F. Becker, B. Blank, C. Borcea, A. Buta, P. Butler, J. M. Casandjian, W. N. Catford, T. Czosnyka, A. Emsallem, G. De France, J. Genevey, J. GerlF. Hannachi, K. Hauschild, R. D. Herzberg, A. Hürstel, J. Iwanicki, D. Jenkins, G. Jones, M. Lewitowicz, R. Lucas, I. Matea, F. Negoita, F. De Oliviera Santos, D. Pantelica, J. Pinston, P. Rahkila, M. Rejmund, G. Sletten, M. Stanoiu, C. Timis, R. Wadsworth, J. N. Wilson, M. Zielińska

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Shape coexistence in the light krypton isotopes was studied in a series of experiments at GANIL using various experimental techniques. A new low-lying 0⁺ state, a so-called shape isomer, was found in delayed conversion-electron spectroscopy after fragmentation reactions. The systematics of such low-lying 0⁺ states suggests that the ground states of the isotopes ⁷⁸Kr and ⁷⁶Kr have prolate deformation, while states with prolate and oblate shape are practically degenerate and strongly mixed in ⁷⁴Kr, and that the oblate configuration becomes the ground state in ⁷²Kr. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive ⁷⁶Kr and ⁷⁴Kr beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed γ-ray yields. The results find the prolate shape for the ground-state bands in ⁷⁶Kr and ⁷⁴Kr and an oblate deformation for the excited 2₂ ⁺ state in ⁷⁴Kr, confirming the proposed scenario of shape coexistence.

Original language	English
Title of host publication	NUCLEI AT THE LIMITS
Publisher	American Institute of Physics
Pages	55-61
Number of pages	7
Volume	764
ISBN (Print)	0735402493, 9780735402492
DOIs	https://doi.org/10.1063/1.1905291
Publication status	Published - 5 Apr 2005
Event	Nuclei at the Limits - Argonne, IL, United States Duration: 26 Jul 2004 → 30 Jul 2004

Conference

Conference	Nuclei at the Limits
Country/Territory	United States
City	Argonne, IL
Period	26/07/04 → 30/07/04

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10.1063/1.1905291

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Clément, E., Görgen, A., Bouchez, E., Chatillon, A., Korten, W., Le Coz, Y., Theisen, C., Andreoiu, C., Becker, F., Blank, B., Borcea, C., Buta, A., Butler, P., Casandjian, J. M., Catford, W. N., Czosnyka, T., Emsallem, A., De France, G., Genevey, J., ... Zielińska, M. (2005). Shape coexistence in light krypton isotopes. In NUCLEI AT THE LIMITS (Vol. 764, pp. 55-61). American Institute of Physics. https://doi.org/10.1063/1.1905291

@inproceedings{ee15194a213e4fe6bc8408469f1f9821,

title = "Shape coexistence in light krypton isotopes",

abstract = "Shape coexistence in the light krypton isotopes was studied in a series of experiments at GANIL using various experimental techniques. A new low-lying 0+ state, a so-called shape isomer, was found in delayed conversion-electron spectroscopy after fragmentation reactions. The systematics of such low-lying 0+ states suggests that the ground states of the isotopes 78Kr and 76Kr have prolate deformation, while states with prolate and oblate shape are practically degenerate and strongly mixed in 74Kr, and that the oblate configuration becomes the ground state in 72Kr. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive 76Kr and 74Kr beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed γ-ray yields. The results find the prolate shape for the ground-state bands in 76Kr and 74Kr and an oblate deformation for the excited 22 + state in 74Kr, confirming the proposed scenario of shape coexistence.",

author = "E. Cl{\'e}ment and A. G{\"o}rgen and E. Bouchez and A. Chatillon and W. Korten and {Le Coz}, Y. and Ch Theisen and C. Andreoiu and F. Becker and B. Blank and C. Borcea and A. Buta and P. Butler and Casandjian, {J. M.} and Catford, {W. N.} and T. Czosnyka and A. Emsallem and {De France}, G. and J. Genevey and J. Gerl and F. Hannachi and K. Hauschild and Herzberg, {R. D.} and A. H{\"u}rstel and J. Iwanicki and D. Jenkins and G. Jones and M. Lewitowicz and R. Lucas and I. Matea and F. Negoita and {De Oliviera Santos}, F. and D. Pantelica and J. Pinston and P. Rahkila and M. Rejmund and G. Sletten and M. Stanoiu and C. Timis and R. Wadsworth and Wilson, {J. N.} and M. Zieli{\'n}ska",

year = "2005",

month = apr,

day = "5",

doi = "10.1063/1.1905291",

language = "English",

isbn = "0735402493",

volume = "764",

pages = "55--61",

booktitle = "NUCLEI AT THE LIMITS",

publisher = "American Institute of Physics",

address = "United States",

note = "Nuclei at the Limits ; Conference date: 26-07-2004 Through 30-07-2004",

}

Clément, E, Görgen, A, Bouchez, E, Chatillon, A, Korten, W, Le Coz, Y, Theisen, C, Andreoiu, C, Becker, F, Blank, B, Borcea, C, Buta, A, Butler, P, Casandjian, JM, Catford, WN, Czosnyka, T, Emsallem, A, De France, G, Genevey, J, Gerl, J, Hannachi, F, Hauschild, K, Herzberg, RD, Hürstel, A, Iwanicki, J, Jenkins, D, Jones, G, Lewitowicz, M, Lucas, R, Matea, I, Negoita, F, De Oliviera Santos, F, Pantelica, D, Pinston, J, Rahkila, P, Rejmund, M, Sletten, G, Stanoiu, M, Timis, C, Wadsworth, R, Wilson, JN & Zielińska, M 2005, Shape coexistence in light krypton isotopes. in NUCLEI AT THE LIMITS. vol. 764, American Institute of Physics, pp. 55-61, Nuclei at the Limits, Argonne, IL, United States, 26/07/04. https://doi.org/10.1063/1.1905291

TY - GEN

T1 - Shape coexistence in light krypton isotopes

AU - Clément, E.

AU - Görgen, A.

AU - Bouchez, E.

AU - Chatillon, A.

AU - Korten, W.

AU - Le Coz, Y.

AU - Theisen, Ch

AU - Andreoiu, C.

AU - Becker, F.

AU - Blank, B.

AU - Borcea, C.

AU - Buta, A.

AU - Butler, P.

AU - Casandjian, J. M.

AU - Catford, W. N.

AU - Czosnyka, T.

AU - Emsallem, A.

AU - De France, G.

AU - Genevey, J.

AU - Gerl, J.

AU - Hannachi, F.

AU - Hauschild, K.

AU - Herzberg, R. D.

AU - Hürstel, A.

AU - Iwanicki, J.

AU - Jenkins, D.

AU - Jones, G.

AU - Lewitowicz, M.

AU - Lucas, R.

AU - Matea, I.

AU - Negoita, F.

AU - De Oliviera Santos, F.

AU - Pantelica, D.

AU - Pinston, J.

AU - Rahkila, P.

AU - Rejmund, M.

AU - Sletten, G.

AU - Stanoiu, M.

AU - Timis, C.

AU - Wadsworth, R.

AU - Wilson, J. N.

AU - Zielińska, M.

PY - 2005/4/5

Y1 - 2005/4/5

N2 - Shape coexistence in the light krypton isotopes was studied in a series of experiments at GANIL using various experimental techniques. A new low-lying 0+ state, a so-called shape isomer, was found in delayed conversion-electron spectroscopy after fragmentation reactions. The systematics of such low-lying 0+ states suggests that the ground states of the isotopes 78Kr and 76Kr have prolate deformation, while states with prolate and oblate shape are practically degenerate and strongly mixed in 74Kr, and that the oblate configuration becomes the ground state in 72Kr. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive 76Kr and 74Kr beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed γ-ray yields. The results find the prolate shape for the ground-state bands in 76Kr and 74Kr and an oblate deformation for the excited 22 + state in 74Kr, confirming the proposed scenario of shape coexistence.

AB - Shape coexistence in the light krypton isotopes was studied in a series of experiments at GANIL using various experimental techniques. A new low-lying 0+ state, a so-called shape isomer, was found in delayed conversion-electron spectroscopy after fragmentation reactions. The systematics of such low-lying 0+ states suggests that the ground states of the isotopes 78Kr and 76Kr have prolate deformation, while states with prolate and oblate shape are practically degenerate and strongly mixed in 74Kr, and that the oblate configuration becomes the ground state in 72Kr. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive 76Kr and 74Kr beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed γ-ray yields. The results find the prolate shape for the ground-state bands in 76Kr and 74Kr and an oblate deformation for the excited 22 + state in 74Kr, confirming the proposed scenario of shape coexistence.

UR - http://www.scopus.com/inward/record.url?scp=33749002576&partnerID=8YFLogxK

U2 - 10.1063/1.1905291

DO - 10.1063/1.1905291

M3 - Conference contribution

AN - SCOPUS:33749002576

SN - 0735402493

SN - 9780735402492

VL - 764

SP - 55

EP - 61

BT - NUCLEI AT THE LIMITS

PB - American Institute of Physics

T2 - Nuclei at the Limits

Y2 - 26 July 2004 through 30 July 2004

ER -

Shape coexistence in light krypton isotopes

Abstract

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