Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements

V. Werner; N. Benczer-Koller; G. Kumbartzki; J. D. Holt; P. Boutachkov; E. Stefanova; M. Perry; N. Pietralla; H. Ai; K. Aleksandrova; G. Anderson; R. B. Cakirli; R. J. Casperson; R. F. Casten; M. Chamberlain; C. Copos; B. Darakchieva; S. Eckel; M. Evtimova; C. R. Fitzpatrick; A. B. Garnsworthy; G. Gürdal; A. Heinz; D. Kovacheva; C. Lambie-Hanson; X. Liang; P. Manchev; E. A. McCutchan; D. A. Meyer; J. Qian; A. Schmidt; N. J. Thompson; E. Williams; R. Winkler

doi:10.1103/PhysRevC.78.031301

Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements

V. Werner^*, N. Benczer-Koller, G. Kumbartzki, J. D. Holt, P. Boutachkov, E. Stefanova, M. Perry, N. Pietralla, H. Ai, K. Aleksandrova, G. Anderson, R. B. Cakirli, R. J. Casperson, R. F. Casten, M. Chamberlain, C. Copos, B. Darakchieva, S. Eckel, M. Evtimova, C. R. FitzpatrickA. B. Garnsworthy, G. Gürdal, A. Heinz, D. Kovacheva, C. Lambie-Hanson, X. Liang, P. Manchev, E. A. McCutchan, D. A. Meyer, J. Qian, A. Schmidt, N. J. Thompson, E. Williams, R. Winkler

^*Corresponding author for this work

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

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Abstract

Using the transient field technique, the magnetic moments of the second excited 2+ states in Zr92,94 have been measured for the first time. The large positive g factors, g(22+;92Zr)=+0.76(50) and g(22+;94Zr)=+0.88(27), which are in contrast to the known negative g factors of the 21+ states, are found to be a consequence of weak proton-neutron coupling combined with the Z=40 subshell closure. From their large M1 transition strengths to the 21+ states, in earlier works an assignment to the 22+ states as proton-neutron symmetric and mixed-symmetry states has been made, which are now found to be polarized in their proton-neutron content. This fact allows to identify the underlying microscopic main configurations in the wave functions, which form the building blocks of symmetric and mixed-symmetry states in this region as valence nucleons are added and shell structure changes.

Original language	English
Article number	031301
Journal	Physical Review C - Nuclear Physics
Volume	78
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.78.031301
Publication status	Published - 12 Sept 2008
Externally published	Yes

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Werner, V., Benczer-Koller, N., Kumbartzki, G., Holt, J. D., Boutachkov, P., Stefanova, E., Perry, M., Pietralla, N., Ai, H., Aleksandrova, K., Anderson, G., Cakirli, R. B., Casperson, R. J., Casten, R. F., Chamberlain, M., Copos, C., Darakchieva, B., Eckel, S., Evtimova, M., ... Winkler, R. (2008). Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements. Physical Review C - Nuclear Physics, 78(3), Article 031301. https://doi.org/10.1103/PhysRevC.78.031301

@article{8e081d68f76b4783850e682f3cf7d8a0,

title = "Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements",

abstract = "Using the transient field technique, the magnetic moments of the second excited 2+ states in Zr92,94 have been measured for the first time. The large positive g factors, g(22+;92Zr)=+0.76(50) and g(22+;94Zr)=+0.88(27), which are in contrast to the known negative g factors of the 21+ states, are found to be a consequence of weak proton-neutron coupling combined with the Z=40 subshell closure. From their large M1 transition strengths to the 21+ states, in earlier works an assignment to the 22+ states as proton-neutron symmetric and mixed-symmetry states has been made, which are now found to be polarized in their proton-neutron content. This fact allows to identify the underlying microscopic main configurations in the wave functions, which form the building blocks of symmetric and mixed-symmetry states in this region as valence nucleons are added and shell structure changes.",

author = "V. Werner and N. Benczer-Koller and G. Kumbartzki and Holt, {J. D.} and P. Boutachkov and E. Stefanova and M. Perry and N. Pietralla and H. Ai and K. Aleksandrova and G. Anderson and Cakirli, {R. B.} and Casperson, {R. J.} and Casten, {R. F.} and M. Chamberlain and C. Copos and B. Darakchieva and S. Eckel and M. Evtimova and Fitzpatrick, {C. R.} and Garnsworthy, {A. B.} and G. G{\"u}rdal and A. Heinz and D. Kovacheva and C. Lambie-Hanson and X. Liang and P. Manchev and McCutchan, {E. A.} and Meyer, {D. A.} and J. Qian and A. Schmidt and Thompson, {N. J.} and E. Williams and R. Winkler",

year = "2008",

month = sep,

day = "12",

doi = "10.1103/PhysRevC.78.031301",

language = "English",

volume = "78",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

Werner, V, Benczer-Koller, N, Kumbartzki, G, Holt, JD, Boutachkov, P, Stefanova, E, Perry, M, Pietralla, N, Ai, H, Aleksandrova, K, Anderson, G, Cakirli, RB, Casperson, RJ, Casten, RF, Chamberlain, M, Copos, C, Darakchieva, B, Eckel, S, Evtimova, M, Fitzpatrick, CR, Garnsworthy, AB, Gürdal, G, Heinz, A, Kovacheva, D, Lambie-Hanson, C, Liang, X, Manchev, P, McCutchan, EA, Meyer, DA, Qian, J, Schmidt, A, Thompson, NJ, Williams, E & Winkler, R 2008, 'Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements', Physical Review C - Nuclear Physics, vol. 78, no. 3, 031301. https://doi.org/10.1103/PhysRevC.78.031301

TY - JOUR

T1 - Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements

AU - Werner, V.

AU - Benczer-Koller, N.

AU - Kumbartzki, G.

AU - Holt, J. D.

AU - Boutachkov, P.

AU - Stefanova, E.

AU - Perry, M.

AU - Pietralla, N.

AU - Ai, H.

AU - Aleksandrova, K.

AU - Anderson, G.

AU - Cakirli, R. B.

AU - Casperson, R. J.

AU - Casten, R. F.

AU - Chamberlain, M.

AU - Copos, C.

AU - Darakchieva, B.

AU - Eckel, S.

AU - Evtimova, M.

AU - Fitzpatrick, C. R.

AU - Garnsworthy, A. B.

AU - Gürdal, G.

AU - Heinz, A.

AU - Kovacheva, D.

AU - Lambie-Hanson, C.

AU - Liang, X.

AU - Manchev, P.

AU - McCutchan, E. A.

AU - Meyer, D. A.

AU - Qian, J.

AU - Schmidt, A.

AU - Thompson, N. J.

AU - Williams, E.

AU - Winkler, R.

PY - 2008/9/12

Y1 - 2008/9/12

N2 - Using the transient field technique, the magnetic moments of the second excited 2+ states in Zr92,94 have been measured for the first time. The large positive g factors, g(22+;92Zr)=+0.76(50) and g(22+;94Zr)=+0.88(27), which are in contrast to the known negative g factors of the 21+ states, are found to be a consequence of weak proton-neutron coupling combined with the Z=40 subshell closure. From their large M1 transition strengths to the 21+ states, in earlier works an assignment to the 22+ states as proton-neutron symmetric and mixed-symmetry states has been made, which are now found to be polarized in their proton-neutron content. This fact allows to identify the underlying microscopic main configurations in the wave functions, which form the building blocks of symmetric and mixed-symmetry states in this region as valence nucleons are added and shell structure changes.

AB - Using the transient field technique, the magnetic moments of the second excited 2+ states in Zr92,94 have been measured for the first time. The large positive g factors, g(22+;92Zr)=+0.76(50) and g(22+;94Zr)=+0.88(27), which are in contrast to the known negative g factors of the 21+ states, are found to be a consequence of weak proton-neutron coupling combined with the Z=40 subshell closure. From their large M1 transition strengths to the 21+ states, in earlier works an assignment to the 22+ states as proton-neutron symmetric and mixed-symmetry states has been made, which are now found to be polarized in their proton-neutron content. This fact allows to identify the underlying microscopic main configurations in the wave functions, which form the building blocks of symmetric and mixed-symmetry states in this region as valence nucleons are added and shell structure changes.

UR - http://www.scopus.com/inward/record.url?scp=52249123052&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.78.031301

DO - 10.1103/PhysRevC.78.031301

M3 - Article

SN - 0556-2813

VL - 78

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 3

M1 - 031301

ER -

Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements

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