Separation of pygmy dipole and M1 resonances in Zr90 by a High-resolution inelastic proton scattering near 0°

C. Iwamoto; H. Utsunomiya; A. Tamii; H. Akimune; H. Nakada; T. Shima; T. Yamagata; T. Kawabata; Y. Fujita; H. Matsubara; Y. Shimbara; M. Nagashima; T. Suzuki; H. Fujita; M. Sakuda; T. Mori; T. Izumi; A. Okamoto; T. Kondo; B. Bilgier; H. C. Kozer; Y. W. Lui; K. Hatanaka

doi:10.1103/PhysRevLett.108.262501

Separation of pygmy dipole and M1 resonances in Zr90 by a High-resolution inelastic proton scattering near 0°

C. Iwamoto, H. Utsunomiya, A. Tamii, H. Akimune, H. Nakada, T. Shima, T. Yamagata, T. Kawabata, Y. Fujita, H. Matsubara, Y. Shimbara, M. Nagashima, T. Suzuki, H. Fujita, M. Sakuda, T. Mori, T. Izumi, A. Okamoto, T. Kondo, B. BilgierH. C. Kozer, Y. W. Lui, K. Hatanaka

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Abstract

A high-resolution measurement of inelastic proton scattering off Zr90 near 0° was performed at 295 MeV with a focus on a pronounced strength previously reported in the low-energy tail of giant dipole resonance. A forest of fine structure was observed in the excitation energy region 7-12 MeV. A multipole decomposition analysis of the angular distribution for the forest was carried out using the ECIS95 distorted-wave Born approximation code with the Hartree-Fock plus random-phase approximation model of E1 and M1 transition densities and inclusion of E1 Coulomb excitation. The analysis separated pygmy dipole and M1 resonances in the forest at E _PDR=9.15±0.18MeV with Γ _PDR=2.91±0.64MeV and at E _M1=9. 53±0.06MeV with Γ _M1=2.70±0.17MeV in the Lorentzian function, respectively. The B(E1) value for pygmy dipole resonance over 7-11 MeV is 0.75±0.08e2fm2, which corresponds to 2.1±0.2% of the Thomas-Reiche-Kuhn sum rule.

Original language	English
Article number	262501
Journal	Physical Review Letters
Volume	108
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.108.262501
Publication status	Published - 27-06-2012
Externally published	Yes

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General Physics and Astronomy

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Iwamoto, C., Utsunomiya, H., Tamii, A., Akimune, H., Nakada, H., Shima, T., Yamagata, T., Kawabata, T., Fujita, Y., Matsubara, H., Shimbara, Y., Nagashima, M., Suzuki, T., Fujita, H., Sakuda, M., Mori, T., Izumi, T., Okamoto, A., Kondo, T., ... Hatanaka, K. (2012). Separation of pygmy dipole and M1 resonances in Zr90 by a High-resolution inelastic proton scattering near 0°. Physical Review Letters, 108(26), Article 262501. https://doi.org/10.1103/PhysRevLett.108.262501

@article{0bb8a57246f64d5b8d5c4d5f89266e5f,

title = "Separation of pygmy dipole and M1 resonances in Zr90 by a High-resolution inelastic proton scattering near 0°",

abstract = "A high-resolution measurement of inelastic proton scattering off Zr90 near 0° was performed at 295 MeV with a focus on a pronounced strength previously reported in the low-energy tail of giant dipole resonance. A forest of fine structure was observed in the excitation energy region 7-12 MeV. A multipole decomposition analysis of the angular distribution for the forest was carried out using the ECIS95 distorted-wave Born approximation code with the Hartree-Fock plus random-phase approximation model of E1 and M1 transition densities and inclusion of E1 Coulomb excitation. The analysis separated pygmy dipole and M1 resonances in the forest at E PDR=9.15±0.18MeV with Γ PDR=2.91±0.64MeV and at E M1=9. 53±0.06MeV with Γ M1=2.70±0.17MeV in the Lorentzian function, respectively. The B(E1) value for pygmy dipole resonance over 7-11 MeV is 0.75±0.08e2fm2, which corresponds to 2.1±0.2% of the Thomas-Reiche-Kuhn sum rule.",

author = "C. Iwamoto and H. Utsunomiya and A. Tamii and H. Akimune and H. Nakada and T. Shima and T. Yamagata and T. Kawabata and Y. Fujita and H. Matsubara and Y. Shimbara and M. Nagashima and T. Suzuki and H. Fujita and M. Sakuda and T. Mori and T. Izumi and A. Okamoto and T. Kondo and B. Bilgier and Kozer, {H. C.} and Lui, {Y. W.} and K. Hatanaka",

year = "2012",

month = jun,

day = "27",

doi = "10.1103/PhysRevLett.108.262501",

language = "English",

volume = "108",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "26",

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Iwamoto, C, Utsunomiya, H, Tamii, A, Akimune, H, Nakada, H, Shima, T, Yamagata, T, Kawabata, T, Fujita, Y, Matsubara, H, Shimbara, Y, Nagashima, M, Suzuki, T, Fujita, H, Sakuda, M, Mori, T, Izumi, T, Okamoto, A, Kondo, T, Bilgier, B, Kozer, HC, Lui, YW & Hatanaka, K 2012, 'Separation of pygmy dipole and M1 resonances in Zr90 by a High-resolution inelastic proton scattering near 0°', Physical Review Letters, vol. 108, no. 26, 262501. https://doi.org/10.1103/PhysRevLett.108.262501

TY - JOUR

T1 - Separation of pygmy dipole and M1 resonances in Zr90 by a High-resolution inelastic proton scattering near 0°

AU - Iwamoto, C.

AU - Utsunomiya, H.

AU - Tamii, A.

AU - Akimune, H.

AU - Nakada, H.

AU - Shima, T.

AU - Yamagata, T.

AU - Kawabata, T.

AU - Fujita, Y.

AU - Matsubara, H.

AU - Shimbara, Y.

AU - Nagashima, M.

AU - Suzuki, T.

AU - Fujita, H.

AU - Sakuda, M.

AU - Mori, T.

AU - Izumi, T.

AU - Okamoto, A.

AU - Kondo, T.

AU - Bilgier, B.

AU - Kozer, H. C.

AU - Lui, Y. W.

AU - Hatanaka, K.

PY - 2012/6/27

Y1 - 2012/6/27

N2 - A high-resolution measurement of inelastic proton scattering off Zr90 near 0° was performed at 295 MeV with a focus on a pronounced strength previously reported in the low-energy tail of giant dipole resonance. A forest of fine structure was observed in the excitation energy region 7-12 MeV. A multipole decomposition analysis of the angular distribution for the forest was carried out using the ECIS95 distorted-wave Born approximation code with the Hartree-Fock plus random-phase approximation model of E1 and M1 transition densities and inclusion of E1 Coulomb excitation. The analysis separated pygmy dipole and M1 resonances in the forest at E PDR=9.15±0.18MeV with Γ PDR=2.91±0.64MeV and at E M1=9. 53±0.06MeV with Γ M1=2.70±0.17MeV in the Lorentzian function, respectively. The B(E1) value for pygmy dipole resonance over 7-11 MeV is 0.75±0.08e2fm2, which corresponds to 2.1±0.2% of the Thomas-Reiche-Kuhn sum rule.

AB - A high-resolution measurement of inelastic proton scattering off Zr90 near 0° was performed at 295 MeV with a focus on a pronounced strength previously reported in the low-energy tail of giant dipole resonance. A forest of fine structure was observed in the excitation energy region 7-12 MeV. A multipole decomposition analysis of the angular distribution for the forest was carried out using the ECIS95 distorted-wave Born approximation code with the Hartree-Fock plus random-phase approximation model of E1 and M1 transition densities and inclusion of E1 Coulomb excitation. The analysis separated pygmy dipole and M1 resonances in the forest at E PDR=9.15±0.18MeV with Γ PDR=2.91±0.64MeV and at E M1=9. 53±0.06MeV with Γ M1=2.70±0.17MeV in the Lorentzian function, respectively. The B(E1) value for pygmy dipole resonance over 7-11 MeV is 0.75±0.08e2fm2, which corresponds to 2.1±0.2% of the Thomas-Reiche-Kuhn sum rule.

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UR - http://www.scopus.com/inward/citedby.url?scp=84863002993&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.108.262501

DO - 10.1103/PhysRevLett.108.262501

M3 - Article

AN - SCOPUS:84863002993

SN - 0031-9007

VL - 108

JO - Physical Review Letters

JF - Physical Review Letters

IS - 26

M1 - 262501

ER -

Separation of pygmy dipole and M1 resonances in Zr90 by a High-resolution inelastic proton scattering near 0°

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