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

C. D. O'Leary; C. E. Svensson; S. G. Frauendorf; A. V. Afanasjev; D. E. Appelbe; R. A.E. Austin; G. C. Ball; J. A. Cameron; R. M. Clark; M. Cromaz; P. Fallen; D. F. Hodgson; N. S. Kelsall; A. O. Macchiavelli; I. Ragnarsson; D. Sarantites; J. C. Waddington; R. Wadsworth

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

C. D. O'Leary, C. E. Svensson, S. G. Frauendorf, A. V. Afanasjev, D. E. Appelbe, R. A.E. Austin, G. C. Ball, J. A. Cameron, R. M. Clark, M. Cromaz, P. Fallen, D. F. Hodgson, N. S. Kelsall, A. O. Macchiavelli, I. Ragnarsson, D. Sarantites, J. C. Waddington, R. Wadsworth

Faculty of Engineering, LTH

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

Abstract

High-spin states in the odd-odd N = Z nucleus ₃₇⁷⁴Rb₃₇ were studied using the ⁴⁰Ca(⁴⁰Ca,αnp) reaction. A previously observed odd-spin T = 0 band has been extended to I^π = (31⁺) and an even-spin T = 0 band has been observed for the first time to I^π = (22⁺); both have a π(g_9/2)⊗ν(g_9/2) structure. A strongly coupled low-spin T = 0, K = 3 band has been interpreted as being based upon a π[312]3/2 ⊗ ν[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
Article number	021301
Pages (from-to)	213011-213015
Number of pages	5
Journal	Physical Review C - Nuclear Physics
Volume	67
Issue number	2
Publication status	Published - 2003 Feb 1

Subject classification (UKÄ)

Subatomic Physics

Cite this

O'Leary, C. D., Svensson, C. E., Frauendorf, S. G., Afanasjev, A. V., Appelbe, D. E., Austin, R. A. E., Ball, G. C., Cameron, J. A., Clark, R. M., Cromaz, M., Fallen, P., Hodgson, D. F., Kelsall, N. S., Macchiavelli, A. O., Ragnarsson, I., Sarantites, D., Waddington, J. C., & Wadsworth, R. (2003). Evidence for isovector neutron-proton pairing from high-spin states in N = Z ⁷⁴Rb. Physical Review C - Nuclear Physics, 67(2), 213011-213015. Article 021301.

@article{3313dbfd2dce4f9a81c4ba40ffb4b587,

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

abstract = "High-spin states in the odd-odd N = Z nucleus 3774Rb37 were studied using the 40Ca(40Ca,αnp) reaction. A previously observed odd-spin T = 0 band has been extended to Iπ = (31+) and an even-spin T = 0 band has been observed for the first time to Iπ = (22+); both have a π(g9/2)⊗ν(g9/2) structure. A strongly coupled low-spin T = 0, K = 3 band has been interpreted as being based upon a π[312]3/2 ⊗ ν[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 = "O'Leary, {C. D.} and Svensson, {C. E.} and Frauendorf, {S. G.} and Afanasjev, {A. V.} and Appelbe, {D. E.} and Austin, {R. A.E.} and Ball, {G. C.} and Cameron, {J. A.} and Clark, {R. M.} and M. Cromaz and P. Fallen and Hodgson, {D. F.} and Kelsall, {N. S.} and Macchiavelli, {A. O.} and I. Ragnarsson and D. Sarantites and Waddington, {J. C.} and R. Wadsworth",

year = "2003",

month = feb,

day = "1",

language = "English",

volume = "67",

pages = "213011--213015",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "2",

}

O'Leary, CD, Svensson, CE, Frauendorf, SG, Afanasjev, AV, Appelbe, DE, Austin, RAE, Ball, GC, Cameron, JA, Clark, RM, Cromaz, M, Fallen, 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 ⁷⁴Rb', Physical Review C - Nuclear Physics, vol. 67, no. 2, 021301, pp. 213011-213015.

TY - JOUR

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

AU - O'Leary, C. D.

AU - Svensson, C. E.

AU - Frauendorf, S. G.

AU - Afanasjev, A. V.

AU - Appelbe, D. E.

AU - Austin, R. A.E.

AU - Ball, G. C.

AU - Cameron, J. A.

AU - Clark, R. M.

AU - Cromaz, M.

AU - Fallen, P.

AU - Hodgson, D. F.

AU - Kelsall, N. S.

AU - Macchiavelli, A. O.

AU - Ragnarsson, I.

AU - Sarantites, D.

AU - Waddington, J. C.

AU - Wadsworth, R.

PY - 2003/2/1

Y1 - 2003/2/1

N2 - High-spin states in the odd-odd N = Z nucleus 3774Rb37 were studied using the 40Ca(40Ca,αnp) reaction. A previously observed odd-spin T = 0 band has been extended to Iπ = (31+) and an even-spin T = 0 band has been observed for the first time to Iπ = (22+); both have a π(g9/2)⊗ν(g9/2) structure. A strongly coupled low-spin T = 0, K = 3 band has been interpreted as being based upon a π[312]3/2 ⊗ ν[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 3774Rb37 were studied using the 40Ca(40Ca,αnp) reaction. A previously observed odd-spin T = 0 band has been extended to Iπ = (31+) and an even-spin T = 0 band has been observed for the first time to Iπ = (22+); both have a π(g9/2)⊗ν(g9/2) structure. A strongly coupled low-spin T = 0, K = 3 band has been interpreted as being based upon a π[312]3/2 ⊗ ν[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.

M3 - Article

AN - SCOPUS:0037316567

SN - 0556-2813

VL - 67

SP - 213011

EP - 213015

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 2

M1 - 021301

ER -

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

Abstract

Subject classification (UKÄ)

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