Low-lying electric dipole γ-continuum for the unstable 62,64Fe nuclei: Strength evolution with neutron number

R.  Avigo; O. Wieland; A. Bracco; F. Camera; F. Ameil; et al.; Pavel Golubev; Nataša Lalović; Dirk Rudolph; Luis Sarmiento Pico; H.J. Wollersheim

doi:10.1016/j.physletb.2020.135951

Low-lying electric dipole γ-continuum for the unstable ^62,64Fe nuclei: Strength evolution with neutron number

R. Avigo, O. Wieland, A. Bracco, F. Camera, F. Ameil, et al., Pavel Golubev, Nataša Lalović, Dirk Rudolph, Luis Sarmiento Pico, H.J. Wollersheim

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The γ-ray emission from the nuclei ^62,64Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei ^62,64Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ-ray spectra the summed E1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1⁻ states (three-phonon states) inducing a strong fragmentation of the E1 nuclear response below the neutron binding energy. © 2020 The Author(s)

Originalspråk	engelska
Artikelnummer	135951
Antal sidor	6
Tidskrift	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volym	811
DOI	https://doi.org/10.1016/j.physletb.2020.135951
Status	Published - 2020

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10.1016/j.physletb.2020.135951

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Performance of the AGATA Gamma-ray Spectrometer in the PreSPEC Set-up at GSI
Lalovic, N., Louchart, C., Michelagnoli, C., Perez-Vidal, R. M., Ralet, D., Gerl, J., Rudolph, D., Arici, T., Bazzacco, D., Clement, E., Gadea, A., Kojouharov, I., Korichi, A., Labiche, M., Ljungvall, J., Lopez-Martens, A., Nyberg, J., Pietralla, N., Pietri, S., Stezowski, O., & 2 andraCollaboration, T. AGATA. & Collaboration, T. PPEC., 2016, I: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 806, s. 258-266 9 s.
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Data-flow Coupling and Data-Acquisition Triggers for the PreSPEC-AGATA Campaign at GSI
Ralet, D., Pietri, S., Aubert, Y., Bellato, M., Bortolato, D., Brambilla, S., Camera, F., Dosme, N., Gadea, A., Gerl, J., Golubev, P., Grave, X., Johansson, H. T., Karkour, N., Korichi, A., Kurz, N., Lafay, X., Legay, E., Linget, D., Pietralla, N., & 5 andraRudolph, D., Schaffner, H., Stezowski, O., Travers, B. & Wieland, O., 2015, I: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 786, s. 32-39 8 s.
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On the Road to FAIR: 1st Operation of AGATA in PreSPEC at GSI
Pietralla, N., Reese, M., Cortes, M. L., Ameil, F., Bazzacco, D., Bentley, M. A., Boutachkov, P., Domingo-Pardo, C., Gadea, A., Gerl, J., Goel, N., Golubev, P., Górska, M., Guastalla, G., Habermann, T., Kojouharov, I., Korten, W., Merchán, E., Pietri, S., Ralet, D., & 7 andraReiter, P., Rudolph, D., Schaffner, H., Singh, P. P., Wieland, O., Wollersheim, H. J. & Collaboration, T. PPEC-AGATA., 2014, EPJ Web of Conferences. Lunardi, S., Bizzeti, P. G., Bucci, C., Chiari, M., Dainese, A., Di Nezza, P., Menegazzo, R., Nannini, A., Signorini, C. & Valiente-Dobon, J. J. (red.). EDP Sciences, Vol. 66. s. 02083 4 s.
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FAIR-NUSTAR: HISPEC-DESPEC experiment & Super-FRS bidrag
Rudolph, D., Golubev, P. & Sarmiento Pico, L.
Swedish Research Council, Crafoordska stiftelsen, Kungliga Fysiografiska Sällskapet i Lund
2010/03/12 → 2030/12/31
Projekt: Forskning
Kärnstruktur vid stabilitetsgränsen: Spektroskopi av särskilda isotoper
Rudolph, D., Fahlander, C., Golubev, P., Sarmiento Pico, L., Cox, D., Hrabar, Y., Såmark-Roth, A., Forsberg, U., Lorenz, C., Lalovic, N., Lalovic, N., Forsberg, U., Gellanki, J., Hoischen, R., Johansson, E., Andersson, L., du Rietz, R., Ekman, J. & Andreoiu, C.
Swedish Research Council
2002/01/01 → 2027/12/31
Projekt: Forskning

Platform for Advanced Radiaton Detectors
Pavel Golubev (Manager)
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2 Medlem i styrelse/kommitté/råd etc
1 Inbjuden talare
1 Presentation

PreSPEC-AGATA: Performance of AGATA in the PreSPEC Set-up
Natasa Lalovic (Talare)
2015 nov. 10
Aktivitet: Föredrag eller presentation › Presentation
In-beam Gamma-ray Spectroscopy at Relativistic Energies: First Results from the PreSPEC-AGATA Campaign
Dirk Rudolph (Talare)
2013 dec. 6
Aktivitet: Föredrag eller presentation › Inbjuden talare
PRESPEC-AGATA Campaign Spokesperson
Dirk Rudolph (ordförande)
2012 → 2014
Aktivitet: Konsultverksamhet, expertuppdrag och medlemskap › Medlem i styrelse/kommitté/råd etc

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Avigo, R., Wieland, O., Bracco, A., Camera, F., Ameil, F., et al., Golubev, P., Lalović, N., Rudolph, D., Sarmiento Pico, L., & Wollersheim, H. J. (2020). Low-lying electric dipole γ-continuum for the unstable ^62,64Fe nuclei: Strength evolution with neutron number. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 811, Article 135951. https://doi.org/10.1016/j.physletb.2020.135951

@article{de27ffc142874f6ca948b1300ec751e5,

title = "Low-lying electric dipole γ-continuum for the unstable 62,64Fe nuclei: Strength evolution with neutron number",

abstract = "The γ-ray emission from the nuclei 62,64Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei 62,64Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ-ray spectra the summed E1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1− states (three-phonon states) inducing a strong fragmentation of the E1 nuclear response below the neutron binding energy. {\textcopyright} 2020 The Author(s)",

keywords = "62Fe, 64Fe, Dipole excitation around neutron threshold, Nuclear structure",

author = "R. Avigo and O. Wieland and A. Bracco and F. Camera and F. Ameil and {et al.} and Pavel Golubev and Nata{\v s}a Lalovi{\'c} and Dirk Rudolph and {Sarmiento Pico}, Luis and H.J. Wollersheim",

year = "2020",

doi = "10.1016/j.physletb.2020.135951",

language = "English",

volume = "811",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}

Avigo, R, Wieland, O, Bracco, A, Camera, F, Ameil, F, et al., Golubev, P, Lalović, N, Rudolph, D , Sarmiento Pico, L & Wollersheim, HJ 2020, 'Low-lying electric dipole γ-continuum for the unstable ^62,64Fe nuclei: Strength evolution with neutron number', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 811, 135951. https://doi.org/10.1016/j.physletb.2020.135951

TY - JOUR

T1 - Low-lying electric dipole γ-continuum for the unstable 62,64Fe nuclei: Strength evolution with neutron number

AU - Avigo, R.

AU - Wieland, O.

AU - Bracco, A.

AU - Camera, F.

AU - Ameil, F.

AU - et al.

AU - Golubev, Pavel

AU - Lalović, Nataša

AU - Rudolph, Dirk

AU - Sarmiento Pico, Luis

AU - Wollersheim, H.J.

PY - 2020

Y1 - 2020

N2 - The γ-ray emission from the nuclei 62,64Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei 62,64Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ-ray spectra the summed E1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1− states (three-phonon states) inducing a strong fragmentation of the E1 nuclear response below the neutron binding energy. © 2020 The Author(s)

AB - The γ-ray emission from the nuclei 62,64Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei 62,64Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ-ray spectra the summed E1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1− states (three-phonon states) inducing a strong fragmentation of the E1 nuclear response below the neutron binding energy. © 2020 The Author(s)

KW - 62Fe

KW - 64Fe

KW - Dipole excitation around neutron threshold

KW - Nuclear structure

U2 - 10.1016/j.physletb.2020.135951

DO - 10.1016/j.physletb.2020.135951

M3 - Article

SN - 0370-2693

VL - 811

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 135951

ER -

Low-lying electric dipole γ-continuum for the unstable 62,64Fe nuclei: Strength evolution with neutron number

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Low-lying electric dipole γ-continuum for the unstable ^62,64Fe nuclei: Strength evolution with neutron number