Low-lying isovector 2(+) valence-shell excitations of Po-212

D. Kocheva; G. Rainovski; J. Jolie; N. Pietralla; C. Stahl; P. Petkov; A. Blazhev; A. Hennig; A. Astier; Th. Braunroth; M. L. Cortes; A. Dewald; M. Djongolov; C. Fransen; K. Gladnishki; V. Karayonchev; J. Litzinger; C. Mueller-Gatermann; M. Scheck; Ph. Scholz; R. Stegmann; P. Thoele; V. Werner; W. Witt; D. Woelk; P. Van Isacker

doi:10.1103/PhysRevC.93.011303

Low-lying isovector 2(+) valence-shell excitations of Po-212

D. Kocheva, G. Rainovski, J. Jolie, N. Pietralla, C. Stahl, P. Petkov, A. Blazhev, A. Hennig, A. Astier, Th. Braunroth, M. L. Cortes, A. Dewald, M. Djongolov, C. Fransen, K. Gladnishki, V. Karayonchev, J. Litzinger, C. Mueller-Gatermann, M. Scheck, Ph. ScholzR. Stegmann, P. Thoele, V. Werner, W. Witt, D. Woelk, P. Van Isacker

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Abstract

We present the results from an experiment dedicated to search for quadrupole-collective isovector valence-shell excitations, states with so-called mixed proton-neutron symmetry (MSS), of 212Po. This nucleus was studied in an
α-transfer reaction. The lifetimes of two short-lived excited states, candidates for the one-phonon MSS, were determined by utilizing the Doppler shift attenuation method. The experimental results are in qualitative agreement with a simple single-j shell model calculation, which, together with the observed lack of quadrupole collectivity, indicates that the isovector nature of low-lying states is a property of the leading single-particle valence shell configuration.

Original language	English
Article number	011303
Journal	Physical Review C
Volume	93
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.93.011303
Publication status	Published - 19 Jan 2016

Keywords

Nuclear-data sheets
collective modes
mixed-symmetry
states
spectroscopy
beam

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10.1103/PhysRevC.93.011303

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Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Stahl, C., Petkov, P., Blazhev, A., Hennig, A., Astier, A., Braunroth, T., Cortes, M. L., Dewald, A., Djongolov, M., Fransen, C., Gladnishki, K., Karayonchev, V., Litzinger, J., Mueller-Gatermann, C., Scheck, M., ... Van Isacker, P. (2016). Low-lying isovector 2(+) valence-shell excitations of Po-212. Physical Review C, 93(1), Article 011303. https://doi.org/10.1103/PhysRevC.93.011303

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title = "Low-lying isovector 2(+) valence-shell excitations of Po-212",

abstract = "We present the results from an experiment dedicated to search for quadrupole-collective isovector valence-shell excitations, states with so-called mixed proton-neutron symmetry (MSS), of 212Po. This nucleus was studied in an α-transfer reaction. The lifetimes of two short-lived excited states, candidates for the one-phonon MSS, were determined by utilizing the Doppler shift attenuation method. The experimental results are in qualitative agreement with a simple single-j shell model calculation, which, together with the observed lack of quadrupole collectivity, indicates that the isovector nature of low-lying states is a property of the leading single-particle valence shell configuration.",

keywords = "Nuclear-data sheets, collective modes, mixed-symmetry, states, spectroscopy, beam",

author = "D. Kocheva and G. Rainovski and J. Jolie and N. Pietralla and C. Stahl and P. Petkov and A. Blazhev and A. Hennig and A. Astier and Th. Braunroth and Cortes, {M. L.} and A. Dewald and M. Djongolov and C. Fransen and K. Gladnishki and V. Karayonchev and J. Litzinger and C. Mueller-Gatermann and M. Scheck and Ph. Scholz and R. Stegmann and P. Thoele and V. Werner and W. Witt and D. Woelk and {Van Isacker}, P.",

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doi = "10.1103/PhysRevC.93.011303",

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Kocheva, D, Rainovski, G, Jolie, J, Pietralla, N, Stahl, C, Petkov, P, Blazhev, A, Hennig, A, Astier, A, Braunroth, T, Cortes, ML, Dewald, A, Djongolov, M, Fransen, C, Gladnishki, K, Karayonchev, V, Litzinger, J, Mueller-Gatermann, C, Scheck, M, Scholz, P, Stegmann, R, Thoele, P, Werner, V, Witt, W, Woelk, D & Van Isacker, P 2016, 'Low-lying isovector 2(+) valence-shell excitations of Po-212', Physical Review C, vol. 93, no. 1, 011303. https://doi.org/10.1103/PhysRevC.93.011303

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T1 - Low-lying isovector 2(+) valence-shell excitations of Po-212

AU - Kocheva, D.

AU - Rainovski, G.

AU - Jolie, J.

AU - Pietralla, N.

AU - Stahl, C.

AU - Petkov, P.

AU - Blazhev, A.

AU - Hennig, A.

AU - Astier, A.

AU - Braunroth, Th.

AU - Cortes, M. L.

AU - Dewald, A.

AU - Djongolov, M.

AU - Fransen, C.

AU - Gladnishki, K.

AU - Karayonchev, V.

AU - Litzinger, J.

AU - Mueller-Gatermann, C.

AU - Scheck, M.

AU - Scholz, Ph.

AU - Stegmann, R.

AU - Thoele, P.

AU - Werner, V.

AU - Witt, W.

AU - Woelk, D.

AU - Van Isacker, P.

N1 - Keywords from WoS

PY - 2016/1/19

Y1 - 2016/1/19

N2 - We present the results from an experiment dedicated to search for quadrupole-collective isovector valence-shell excitations, states with so-called mixed proton-neutron symmetry (MSS), of 212Po. This nucleus was studied in an α-transfer reaction. The lifetimes of two short-lived excited states, candidates for the one-phonon MSS, were determined by utilizing the Doppler shift attenuation method. The experimental results are in qualitative agreement with a simple single-j shell model calculation, which, together with the observed lack of quadrupole collectivity, indicates that the isovector nature of low-lying states is a property of the leading single-particle valence shell configuration.

AB - We present the results from an experiment dedicated to search for quadrupole-collective isovector valence-shell excitations, states with so-called mixed proton-neutron symmetry (MSS), of 212Po. This nucleus was studied in an α-transfer reaction. The lifetimes of two short-lived excited states, candidates for the one-phonon MSS, were determined by utilizing the Doppler shift attenuation method. The experimental results are in qualitative agreement with a simple single-j shell model calculation, which, together with the observed lack of quadrupole collectivity, indicates that the isovector nature of low-lying states is a property of the leading single-particle valence shell configuration.

KW - Nuclear-data sheets

KW - collective modes

KW - mixed-symmetry

KW - states

KW - spectroscopy

KW - beam

U2 - 10.1103/PhysRevC.93.011303

DO - 10.1103/PhysRevC.93.011303

M3 - Article

SN - 2469-9985

VL - 93

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 011303

ER -

Low-lying isovector 2(+) valence-shell excitations of Po-212

Abstract

Keywords

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