Configuration mixing in 28Mg and the 26Mg (t,p) 28Mg reaction

D. G. Mcneel; A. H. Wuosmaa; S. A. Kuvin; J. Smith; B. B. Back; J. Chen; C. R. Hoffman; B. P. Kay; G. L. Wilson; D. K. Sharp; R. M. Clark; H. L. Crawford; P. Fallon; A. O. Macchiavelli

doi:10.1103/PhysRevC.103.064320

Configuration mixing in 28Mg and the 26Mg (t,p) 28Mg reaction

D. G. Mcneel, A. H. Wuosmaa, S. A. Kuvin, J. Smith, B. B. Back, J. Chen, C. R. Hoffman, B. P. Kay, G. L. Wilson, D. K. Sharp, R. M. Clark, H. L. Crawford, P. Fallon, A. O. Macchiavelli

Nuclear Physics Group

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Abstract

We have studied the 26 Mg (t,p) 28 Mg reaction. The nucleus 28 Mg lies between 24 Mg and 32 Mg, the latter of which is central to the “island of inversion” characterized by low-lying neutron f p-shell configurations. The present results show that the second-excited 0+ state in 28 Mg contains large fp-shell occupation for the neutrons. The experiment was performed in inverse kinematics using the HELIcal Orbit Spectrometer (HELIOS) at Argonne National Laboratory. Shell-model calculations using the SDPF-MU interaction yielded level energies and two-neutron transfer amplitudes that were used in one-step distorted-wave Born approximation calculations to provide theoretical predictions of the proton angular distributions. In many, but not all cases, the data were in good agreement with theoretical predictions.

Original language	English
Journal	Physical Review C
Volume	103
Issue number	6
Early online date	16 Jun 2021
DOIs	https://doi.org/10.1103/PhysRevC.103.064320
Publication status	E-pub ahead of print - 16 Jun 2021

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Mcneel, D. G., Wuosmaa, A. H., Kuvin, S. A., Smith, J., Back, B. B., Chen, J., Hoffman, C. R., Kay, B. P., Wilson, G. L., Sharp, D. K., Clark, R. M., Crawford, H. L., Fallon, P., & Macchiavelli, A. O. (2021). Configuration mixing in 28Mg and the 26Mg (t,p) 28Mg reaction. Physical Review C, 103(6). Advance online publication. https://doi.org/10.1103/PhysRevC.103.064320

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title = "Configuration mixing in 28Mg and the 26Mg (t,p) 28Mg reaction",

abstract = "We have studied the 26 Mg (t,p) 28 Mg reaction. The nucleus 28 Mg lies between 24 Mg and 32 Mg, the latter of which is central to the “island of inversion” characterized by low-lying neutron f p-shell configurations. The present results show that the second-excited 0+ state in 28 Mg contains large fp-shell occupation for the neutrons. The experiment was performed in inverse kinematics using the HELIcal Orbit Spectrometer (HELIOS) at Argonne National Laboratory. Shell-model calculations using the SDPF-MU interaction yielded level energies and two-neutron transfer amplitudes that were used in one-step distorted-wave Born approximation calculations to provide theoretical predictions of the proton angular distributions. In many, but not all cases, the data were in good agreement with theoretical predictions.",

author = "Mcneel, {D. G.} and Wuosmaa, {A. H.} and Kuvin, {S. A.} and J. Smith and Back, {B. B.} and J. Chen and Hoffman, {C. R.} and Kay, {B. P.} and Wilson, {G. L.} and Sharp, {D. K.} and Clark, {R. M.} and Crawford, {H. L.} and P. Fallon and Macchiavelli, {A. O.}",

year = "2021",

month = jun,

day = "16",

doi = "10.1103/PhysRevC.103.064320",

language = "English",

volume = "103",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

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TY - JOUR

T1 - Configuration mixing in 28Mg and the 26Mg (t,p) 28Mg reaction

AU - Mcneel, D. G.

AU - Wuosmaa, A. H.

AU - Kuvin, S. A.

AU - Smith, J.

AU - Back, B. B.

AU - Chen, J.

AU - Hoffman, C. R.

AU - Kay, B. P.

AU - Wilson, G. L.

AU - Sharp, D. K.

AU - Clark, R. M.

AU - Crawford, H. L.

AU - Fallon, P.

AU - Macchiavelli, A. O.

PY - 2021/6/16

Y1 - 2021/6/16

N2 - We have studied the 26 Mg (t,p) 28 Mg reaction. The nucleus 28 Mg lies between 24 Mg and 32 Mg, the latter of which is central to the “island of inversion” characterized by low-lying neutron f p-shell configurations. The present results show that the second-excited 0+ state in 28 Mg contains large fp-shell occupation for the neutrons. The experiment was performed in inverse kinematics using the HELIcal Orbit Spectrometer (HELIOS) at Argonne National Laboratory. Shell-model calculations using the SDPF-MU interaction yielded level energies and two-neutron transfer amplitudes that were used in one-step distorted-wave Born approximation calculations to provide theoretical predictions of the proton angular distributions. In many, but not all cases, the data were in good agreement with theoretical predictions.

AB - We have studied the 26 Mg (t,p) 28 Mg reaction. The nucleus 28 Mg lies between 24 Mg and 32 Mg, the latter of which is central to the “island of inversion” characterized by low-lying neutron f p-shell configurations. The present results show that the second-excited 0+ state in 28 Mg contains large fp-shell occupation for the neutrons. The experiment was performed in inverse kinematics using the HELIcal Orbit Spectrometer (HELIOS) at Argonne National Laboratory. Shell-model calculations using the SDPF-MU interaction yielded level energies and two-neutron transfer amplitudes that were used in one-step distorted-wave Born approximation calculations to provide theoretical predictions of the proton angular distributions. In many, but not all cases, the data were in good agreement with theoretical predictions.

U2 - 10.1103/PhysRevC.103.064320

DO - 10.1103/PhysRevC.103.064320

M3 - Article

SN - 0556-2813

VL - 103

JO - Physical Review C

JF - Physical Review C

IS - 6

ER -

Configuration mixing in 28Mg and the 26Mg (t,p) 28Mg reaction

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