Nature of low-lying electric dipole resonance excitations in Ge 74

D. Negi; M. Wiedeking; E. G. Lanza; E. Litvinova; A. Vitturi; R. A. Bark; L. A. Bernstein; D. L. Bleuel; S. Bvumbi; T. D. Bucher; B. H. Daub; T. S. Dinoko; J. L. Easton; A. Görgen; M. Guttormsen; P. Jones; B. V. Kheswa; N. A. Khumalo; A. C. Larsen; E. A. Lawrie; J. J. Lawrie; S. N.T. Majola; L. P. Masiteng; M. R. Nchodu; J. Ndayishimye; R. T. Newman; S. P. Noncolela; J. N. Orce; P. Papka; L. Pellegri; T. Renstrøm; D. G. Roux; R. Schwengner; O. Shirinda; S. Siem

doi:10.1103/PhysRevC.94.024332

Nature of low-lying electric dipole resonance excitations in Ge 74

D. Negi, M. Wiedeking, E. G. Lanza, E. Litvinova, A. Vitturi, R. A. Bark, L. A. Bernstein, D. L. Bleuel, S. Bvumbi, T. D. Bucher, B. H. Daub, T. S. Dinoko, J. L. Easton, A. Görgen, M. Guttormsen, P. Jones, B. V. Kheswa, N. A. Khumalo, A. C. Larsen, E. A. LawrieJ. J. Lawrie, S. N.T. Majola, L. P. Masiteng, M. R. Nchodu, J. Ndayishimye, R. T. Newman, S. P. Noncolela, J. N. Orce, P. Papka, L. Pellegri, T. Renstrøm, D. G. Roux, R. Schwengner, O. Shirinda, S. Siem

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Abstract

Isospin properties of dipole excitations in Ge74 are investigated using the (α,α′γ) reaction and compared to (γ,γ′) data. The results indicate that the dipole excitations in the energy region of 6 to 9 MeV adhere to the scenario of the recently found splitting of the region of dipole excitations into two separated parts: one at low energy, being populated by both isoscalar and isovector probes, and the other at high energy, excited only by the electromagnetic probe. Relativistic quasiparticle time blocking approximation (RQTBA) calculations show a reduction in the isoscalar E1 strength with an increase in excitation energy, which is consistent with the measurement.

Original language	English
Article number	024332
Journal	Physical Review C
Volume	94
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.94.024332
Publication status	Published - 23 Aug 2016
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.94.024332

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Negi, D., Wiedeking, M., Lanza, E. G., Litvinova, E., Vitturi, A., Bark, R. A., Bernstein, L. A., Bleuel, D. L., Bvumbi, S., Bucher, T. D., Daub, B. H., Dinoko, T. S., Easton, J. L., Görgen, A., Guttormsen, M., Jones, P., Kheswa, B. V., Khumalo, N. A., Larsen, A. C., ... Siem, S. (2016). Nature of low-lying electric dipole resonance excitations in Ge 74. Physical Review C, 94(2), Article 024332. https://doi.org/10.1103/PhysRevC.94.024332

@article{8858c6513bcd437795836f7a2d9cf047,

title = "Nature of low-lying electric dipole resonance excitations in Ge 74",

abstract = "Isospin properties of dipole excitations in Ge74 are investigated using the (α,α′γ) reaction and compared to (γ,γ′) data. The results indicate that the dipole excitations in the energy region of 6 to 9 MeV adhere to the scenario of the recently found splitting of the region of dipole excitations into two separated parts: one at low energy, being populated by both isoscalar and isovector probes, and the other at high energy, excited only by the electromagnetic probe. Relativistic quasiparticle time blocking approximation (RQTBA) calculations show a reduction in the isoscalar E1 strength with an increase in excitation energy, which is consistent with the measurement.",

author = "D. Negi and M. Wiedeking and Lanza, {E. G.} and E. Litvinova and A. Vitturi and Bark, {R. A.} and Bernstein, {L. A.} and Bleuel, {D. L.} and S. Bvumbi and Bucher, {T. D.} and Daub, {B. H.} and Dinoko, {T. S.} and Easton, {J. L.} and A. G{\"o}rgen and M. Guttormsen and P. Jones and Kheswa, {B. V.} and Khumalo, {N. A.} and Larsen, {A. C.} and Lawrie, {E. A.} and Lawrie, {J. J.} and Majola, {S. N.T.} and Masiteng, {L. P.} and Nchodu, {M. R.} and J. Ndayishimye and Newman, {R. T.} and Noncolela, {S. P.} and Orce, {J. N.} and P. Papka and L. Pellegri and T. Renstr{\o}m and Roux, {D. G.} and R. Schwengner and O. Shirinda and S. Siem",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = aug,

day = "23",

doi = "10.1103/PhysRevC.94.024332",

language = "English",

volume = "94",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

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Negi, D, Wiedeking, M, Lanza, EG, Litvinova, E, Vitturi, A, Bark, RA, Bernstein, LA, Bleuel, DL, Bvumbi, S, Bucher, TD, Daub, BH, Dinoko, TS, Easton, JL, Görgen, A, Guttormsen, M, Jones, P, Kheswa, BV, Khumalo, NA, Larsen, AC, Lawrie, EA, Lawrie, JJ, Majola, SNT, Masiteng, LP, Nchodu, MR, Ndayishimye, J, Newman, RT, Noncolela, SP, Orce, JN, Papka, P, Pellegri, L, Renstrøm, T, Roux, DG, Schwengner, R, Shirinda, O & Siem, S 2016, 'Nature of low-lying electric dipole resonance excitations in Ge 74', Physical Review C, vol. 94, no. 2, 024332. https://doi.org/10.1103/PhysRevC.94.024332

TY - JOUR

T1 - Nature of low-lying electric dipole resonance excitations in Ge 74

AU - Negi, D.

AU - Wiedeking, M.

AU - Lanza, E. G.

AU - Litvinova, E.

AU - Vitturi, A.

AU - Bark, R. A.

AU - Bernstein, L. A.

AU - Bleuel, D. L.

AU - Bvumbi, S.

AU - Bucher, T. D.

AU - Daub, B. H.

AU - Dinoko, T. S.

AU - Easton, J. L.

AU - Görgen, A.

AU - Guttormsen, M.

AU - Jones, P.

AU - Kheswa, B. V.

AU - Khumalo, N. A.

AU - Larsen, A. C.

AU - Lawrie, E. A.

AU - Lawrie, J. J.

AU - Majola, S. N.T.

AU - Masiteng, L. P.

AU - Nchodu, M. R.

AU - Ndayishimye, J.

AU - Newman, R. T.

AU - Noncolela, S. P.

AU - Orce, J. N.

AU - Papka, P.

AU - Pellegri, L.

AU - Renstrøm, T.

AU - Roux, D. G.

AU - Schwengner, R.

AU - Shirinda, O.

AU - Siem, S.

PY - 2016/8/23

Y1 - 2016/8/23

N2 - Isospin properties of dipole excitations in Ge74 are investigated using the (α,α′γ) reaction and compared to (γ,γ′) data. The results indicate that the dipole excitations in the energy region of 6 to 9 MeV adhere to the scenario of the recently found splitting of the region of dipole excitations into two separated parts: one at low energy, being populated by both isoscalar and isovector probes, and the other at high energy, excited only by the electromagnetic probe. Relativistic quasiparticle time blocking approximation (RQTBA) calculations show a reduction in the isoscalar E1 strength with an increase in excitation energy, which is consistent with the measurement.

AB - Isospin properties of dipole excitations in Ge74 are investigated using the (α,α′γ) reaction and compared to (γ,γ′) data. The results indicate that the dipole excitations in the energy region of 6 to 9 MeV adhere to the scenario of the recently found splitting of the region of dipole excitations into two separated parts: one at low energy, being populated by both isoscalar and isovector probes, and the other at high energy, excited only by the electromagnetic probe. Relativistic quasiparticle time blocking approximation (RQTBA) calculations show a reduction in the isoscalar E1 strength with an increase in excitation energy, which is consistent with the measurement.

UR - http://www.scopus.com/inward/record.url?scp=84983627581&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.94.024332

DO - 10.1103/PhysRevC.94.024332

M3 - Article

AN - SCOPUS:84983627581

SN - 2469-9985

VL - 94

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024332

ER -

Nature of low-lying electric dipole resonance excitations in Ge 74

Abstract

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