Shape coexistence in light krypton isotopes

E Clement; A Gorgen; E Bouchez; A Chatillon; W Korten; Y Le Coz; C Theisen; C Andreoiu; F Becker; B Blank; C Borcea; A Buta; P Butler; JM Casandjian; WN Catford; T Czosnyka; A Emsallem; G de France; J Genevey; J Gerl; F Hannachi; K Hauschild; RD Herzberg; A Hurstel; J Iwanicki; D Jenkins; G Jones; M Lewitowicz; R Lucas; I. Matea; F Negoita; FD Santos; D Pantelica; J Pinston; P Rahkila; M Rejmund; G Sletten; M Stanoiu; C Timis; R Wadsworth; JN Wilson; M Zielinska

Shape coexistence in light krypton isotopes

E Clement^*, A Gorgen, E Bouchez, A Chatillon, W Korten, Y Le Coz, C Theisen, C Andreoiu, F Becker, B Blank, C Borcea, A Buta, P Butler, JM Casandjian, WN Catford, T Czosnyka, A Emsallem, G de France, J Genevey, J GerlF Hannachi, K Hauschild, RD Herzberg, A Hurstel, J Iwanicki, D Jenkins, G Jones, M Lewitowicz, R Lucas, I. Matea, F Negoita, FD Santos, D Pantelica, J Pinston, P Rahkila, M Rejmund, G Sletten, M Stanoiu, C Timis, R Wadsworth, JN Wilson, M Zielinska

^*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 Kr-78 and Kr-76 have prolate deformation, while states with prolate and oblate shape are practically degenerate and Strongly Mixed M Kr-74, and that the oblate configuration becomes the ground state in Kr-72. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive Kr-76 and Kr-74 beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed gamma-ray yields. The results find the prolate shape for the ground-state bands in Kr-76 and Kr-74 and an oblate deformation for the excited 2(2)(+) State in Kr-74, confirming the proposed scenario of shape coexistence.

Original language	English
Title of host publication	Nuclei at the Limits
Editors	D Seweryniak, TL Khoo
Place of Publication	MELVILLE
Publisher	American Institute of Physics
Pages	55-61
Number of pages	7
ISBN (Print)	0-7354-0249-3
Publication status	Published - 2005
Event	Conference on Nuclei at the Limits - Argonne, Israel Duration: 26 Jul 2004 → 30 Jul 2004

Publication series

Name	AIP CONFERENCE PROCEEDINGS
Publisher	AMER INST PHYSICS
Volume	764
ISSN (Print)	0094-243X

Conference

Conference	Conference on Nuclei at the Limits
Country/Territory	Israel
City	Argonne
Period	26/07/04 → 30/07/04

Keywords

KR-74
NUCLEI
HIGH-SPIN

Cite this

Clement, E., Gorgen, 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., ... Zielinska, M. (2005). Shape coexistence in light krypton isotopes. In D. Seweryniak, & TL. Khoo (Eds.), Nuclei at the Limits (pp. 55-61). (AIP CONFERENCE PROCEEDINGS; Vol. 764). American Institute of Physics.

@inproceedings{bbefc1d8aeff40ca87855cde4d1ac3d2,

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 Kr-78 and Kr-76 have prolate deformation, while states with prolate and oblate shape are practically degenerate and Strongly Mixed M Kr-74, and that the oblate configuration becomes the ground state in Kr-72. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive Kr-76 and Kr-74 beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed gamma-ray yields. The results find the prolate shape for the ground-state bands in Kr-76 and Kr-74 and an oblate deformation for the excited 2(2)(+) State in Kr-74, confirming the proposed scenario of shape coexistence.",

keywords = "KR-74, NUCLEI, HIGH-SPIN",

author = "E Clement and A Gorgen and E Bouchez and A Chatillon and W Korten and {Le Coz}, Y and C Theisen and C Andreoiu and F Becker and B Blank and C Borcea and A Buta and P Butler and JM Casandjian and WN Catford and T Czosnyka and A Emsallem and {de France}, G and J Genevey and J Gerl and F Hannachi and K Hauschild and RD Herzberg and A Hurstel and J Iwanicki and D Jenkins and G Jones and M Lewitowicz and R Lucas and I. Matea and F Negoita and FD Santos 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 JN Wilson and M Zielinska",

year = "2005",

language = "English",

isbn = "0-7354-0249-3",

series = "AIP CONFERENCE PROCEEDINGS",

publisher = "American Institute of Physics",

pages = "55--61",

editor = "D Seweryniak and TL Khoo",

booktitle = "Nuclei at the Limits",

address = "United States",

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

}

Clement, E, Gorgen, 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, Hurstel, A, Iwanicki, J, Jenkins, D, Jones, G, Lewitowicz, M, Lucas, R, Matea, I, Negoita, F, Santos, FD, Pantelica, D, Pinston, J, Rahkila, P, Rejmund, M, Sletten, G, Stanoiu, M, Timis, C, Wadsworth, R , Wilson, JN & Zielinska, M 2005, Shape coexistence in light krypton isotopes. in D Seweryniak & TL Khoo (eds), Nuclei at the Limits. AIP CONFERENCE PROCEEDINGS, vol. 764, American Institute of Physics, MELVILLE, pp. 55-61, Conference on Nuclei at the Limits, Argonne, Israel, 26/07/04.

TY - GEN

T1 - Shape coexistence in light krypton isotopes

AU - Clement, E

AU - Gorgen, A

AU - Bouchez, E

AU - Chatillon, A

AU - Korten, W

AU - Le Coz, Y

AU - Theisen, C

AU - Andreoiu, C

AU - Becker, F

AU - Blank, B

AU - Borcea, C

AU - Buta, A

AU - Butler, P

AU - Casandjian, JM

AU - Catford, WN

AU - Czosnyka, T

AU - Emsallem, A

AU - de France, G

AU - Genevey, J

AU - Gerl, J

AU - Hannachi, F

AU - Hauschild, K

AU - Herzberg, RD

AU - Hurstel, A

AU - Iwanicki, J

AU - Jenkins, D

AU - Jones, G

AU - Lewitowicz, M

AU - Lucas, R

AU - Matea, I.

AU - Negoita, F

AU - Santos, FD

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, JN

AU - Zielinska, M

PY - 2005

Y1 - 2005

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 Kr-78 and Kr-76 have prolate deformation, while states with prolate and oblate shape are practically degenerate and Strongly Mixed M Kr-74, and that the oblate configuration becomes the ground state in Kr-72. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive Kr-76 and Kr-74 beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed gamma-ray yields. The results find the prolate shape for the ground-state bands in Kr-76 and Kr-74 and an oblate deformation for the excited 2(2)(+) State in Kr-74, 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 Kr-78 and Kr-76 have prolate deformation, while states with prolate and oblate shape are practically degenerate and Strongly Mixed M Kr-74, and that the oblate configuration becomes the ground state in Kr-72. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive Kr-76 and Kr-74 beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed gamma-ray yields. The results find the prolate shape for the ground-state bands in Kr-76 and Kr-74 and an oblate deformation for the excited 2(2)(+) State in Kr-74, confirming the proposed scenario of shape coexistence.

KW - KR-74

KW - NUCLEI

KW - HIGH-SPIN

M3 - Conference contribution

SN - 0-7354-0249-3

T3 - AIP CONFERENCE PROCEEDINGS

SP - 55

EP - 61

BT - Nuclei at the Limits

A2 - Seweryniak, D

A2 - Khoo, TL

PB - American Institute of Physics

CY - MELVILLE

T2 - Conference on Nuclei at the Limits

Y2 - 26 July 2004 through 30 July 2004

ER -