Evidence for isovector neutron-proton pairing from high-spin states in N=Z Rb-74

CD O'Leary; CE Svensson; SG Frauendorf; AV Afanasjev; DE Appelbe; RAE Austin; GC Ball; JA Cameron; RM Clark; M Cromaz; P Fallon; DF Hodgson; NS Kelsall; AO Macchiavelli; Ingemar Ragnarsson; D Sarantites; JC Waddington; R Wadsworth

doi:10.1103/PhysRevC.67.021301

Evidence for isovector neutron-proton pairing from high-spin states in N=Z Rb-74

CD O'Leary, CE Svensson, SG Frauendorf, AV Afanasjev, DE Appelbe, RAE Austin, GC Ball, JA Cameron, RM Clark, M Cromaz, P Fallon, DF Hodgson, NS Kelsall, AO Macchiavelli, Ingemar Ragnarsson, D Sarantites, JC Waddington, R Wadsworth

Mathematical Physics

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

Abstract

High-spin states in the odd-odd N=Z nucleus Rb-74(37)37 were studied using the Ca-40(Ca-40,alphanp) reaction. A previously observed odd-spin T=0 band has been extended to I-pi=(31(+)) and an even-spin T=0 band has been observed for the first time to I-pi=(22(+)); both have a pi(g(9/2))circle timesnu(g(9/2)) structure. A strongly coupled low-spin T=0,K=3 band has been interpreted as being based upon a pi[312]3/2 circle timesnu[312]3/2 configuration. Cranked relativistic Hartree-Bogoliubov calculations, which are corrected for the t=1 np-pair field by restoring isospin symmetry, reproduce the observed spectrum. These new results provide evidence for the existence of an isovector pair field that contains a neutron-proton component with the proper strength for ensuring isospin conservation.

Original language	English
Journal	Physical Review C (Nuclear Physics)
Volume	67
Issue number	2: 021301
DOIs	https://doi.org/10.1103/PhysRevC.67.021301
Publication status	Published - 2003

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)

Subject classification (UKÄ)

Physical Sciences

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10.1103/PhysRevC.67.021301

Cite this

O'Leary, CD., Svensson, CE., Frauendorf, SG., Afanasjev, AV., Appelbe, DE., Austin, RAE., Ball, GC., Cameron, JA., Clark, RM., Cromaz, M., Fallon, P., Hodgson, DF., Kelsall, NS., Macchiavelli, AO., Ragnarsson, I., Sarantites, D., Waddington, JC., & Wadsworth, R. (2003). Evidence for isovector neutron-proton pairing from high-spin states in N=Z Rb-74. Physical Review C (Nuclear Physics), 67(2: 021301). https://doi.org/10.1103/PhysRevC.67.021301

@article{d44714ae23fc44d486e78e75293196b6,

title = "Evidence for isovector neutron-proton pairing from high-spin states in N=Z Rb-74",

abstract = "High-spin states in the odd-odd N=Z nucleus Rb-74(37)37 were studied using the Ca-40(Ca-40,alphanp) reaction. A previously observed odd-spin T=0 band has been extended to I-pi=(31(+)) and an even-spin T=0 band has been observed for the first time to I-pi=(22(+)); both have a pi(g(9/2))circle timesnu(g(9/2)) structure. A strongly coupled low-spin T=0,K=3 band has been interpreted as being based upon a pi[312]3/2 circle timesnu[312]3/2 configuration. Cranked relativistic Hartree-Bogoliubov calculations, which are corrected for the t=1 np-pair field by restoring isospin symmetry, reproduce the observed spectrum. These new results provide evidence for the existence of an isovector pair field that contains a neutron-proton component with the proper strength for ensuring isospin conservation.",

author = "CD O'Leary and CE Svensson and SG Frauendorf and AV Afanasjev and DE Appelbe and RAE Austin and GC Ball and JA Cameron and RM Clark and M Cromaz and P Fallon and DF Hodgson and NS Kelsall and AO Macchiavelli and Ingemar Ragnarsson and D Sarantites and JC Waddington and R Wadsworth",

note = "The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)",

year = "2003",

doi = "10.1103/PhysRevC.67.021301",

language = "English",

volume = "67",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2: 021301",

}

O'Leary, CD, Svensson, CE, Frauendorf, SG, Afanasjev, AV, Appelbe, DE, Austin, RAE, Ball, GC, Cameron, JA, Clark, RM, Cromaz, M, Fallon, P, Hodgson, DF, Kelsall, NS, Macchiavelli, AO, Ragnarsson, I, Sarantites, D, Waddington, JC & Wadsworth, R 2003, 'Evidence for isovector neutron-proton pairing from high-spin states in N=Z Rb-74', Physical Review C (Nuclear Physics), vol. 67, no. 2: 021301. https://doi.org/10.1103/PhysRevC.67.021301

TY - JOUR

T1 - Evidence for isovector neutron-proton pairing from high-spin states in N=Z Rb-74

AU - O'Leary, CD

AU - Svensson, CE

AU - Frauendorf, SG

AU - Afanasjev, AV

AU - Appelbe, DE

AU - Austin, RAE

AU - Ball, GC

AU - Cameron, JA

AU - Clark, RM

AU - Cromaz, M

AU - Fallon, P

AU - Hodgson, DF

AU - Kelsall, NS

AU - Macchiavelli, AO

AU - Ragnarsson, Ingemar

AU - Sarantites, D

AU - Waddington, JC

AU - Wadsworth, R

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)

PY - 2003

Y1 - 2003

N2 - High-spin states in the odd-odd N=Z nucleus Rb-74(37)37 were studied using the Ca-40(Ca-40,alphanp) reaction. A previously observed odd-spin T=0 band has been extended to I-pi=(31(+)) and an even-spin T=0 band has been observed for the first time to I-pi=(22(+)); both have a pi(g(9/2))circle timesnu(g(9/2)) structure. A strongly coupled low-spin T=0,K=3 band has been interpreted as being based upon a pi[312]3/2 circle timesnu[312]3/2 configuration. Cranked relativistic Hartree-Bogoliubov calculations, which are corrected for the t=1 np-pair field by restoring isospin symmetry, reproduce the observed spectrum. These new results provide evidence for the existence of an isovector pair field that contains a neutron-proton component with the proper strength for ensuring isospin conservation.

AB - High-spin states in the odd-odd N=Z nucleus Rb-74(37)37 were studied using the Ca-40(Ca-40,alphanp) reaction. A previously observed odd-spin T=0 band has been extended to I-pi=(31(+)) and an even-spin T=0 band has been observed for the first time to I-pi=(22(+)); both have a pi(g(9/2))circle timesnu(g(9/2)) structure. A strongly coupled low-spin T=0,K=3 band has been interpreted as being based upon a pi[312]3/2 circle timesnu[312]3/2 configuration. Cranked relativistic Hartree-Bogoliubov calculations, which are corrected for the t=1 np-pair field by restoring isospin symmetry, reproduce the observed spectrum. These new results provide evidence for the existence of an isovector pair field that contains a neutron-proton component with the proper strength for ensuring isospin conservation.

U2 - 10.1103/PhysRevC.67.021301

DO - 10.1103/PhysRevC.67.021301

M3 - Article

SN - 2469-9985

VL - 67

JO - Physical Review C

JF - Physical Review C

IS - 2: 021301

ER -

Evidence for isovector neutron-proton pairing from high-spin states in N=Z Rb-74

Abstract

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