Gamma-ray spectroscopy of fission fragments with state-of-the-art techniques

Leoni, S.; Michelagnoli, C.; Wilson, J. N.

doi:10.1007/s40766-022-00033-2

Cited by 12 publications

(5 citation statements)

References 384 publications

(1,061 reference statements)

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“…The β 2 value here deduced from the (6 − ) → (4 − ) decay is also reported. where R = 1.2A 1/3 and the B(E 2) value is in e 2 fm 4 . In the Clebsch-Gordan coefficient of Eq.…”

Section: Discussionmentioning

confidence: 99%

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Lifetime measurements in Rb96 via fast-timing techniques: Investigating shape coexistence at A≃100

Gamba,

Bottoni,

Iskra

et al. 2023

Phys. Rev. C

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Lifetime measurements of the (3 − ), (4 − ), and (6 − ) intraband states in the neutron-rich, odd-odd 96 Rb nucleus were performed at the LOHENGRIN spectrometer of Institut Laue-Langevin, using thermal-neutron-induced fission of 235 U and fast-timing techniques with LaBr 3 : Ce scintillator detectors. The nanosecond isomeric nature of the (3 − ) bandhead was established as well as the β 2 = 0.39(3) deformation parameter of the band, pointing to a robust deformation in 96 Rb. Moreover, a hindered B(E 2) value of 3.9 +19 −13 × 10 −2 W.u. was found for the γ decay of the deformed (4 − ) state to the spherical 2 − ground state. A retardation was also found for the (3 − ) → 2 − transition, possibly due to the shape change and giving strong support to a shape coexistence scenario in this nucleus, at the borders of the island of deformation at N = 60. Analogies with the structure of the 98 Y isotone are discussed.

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“…The β 2 value here deduced from the (6 − ) → (4 − ) decay is also reported. where R = 1.2A 1/3 and the B(E 2) value is in e 2 fm 4 . In the Clebsch-Gordan coefficient of Eq.…”

Section: Discussionmentioning

confidence: 99%

“…In this context, the neutron-rich region around mass A ≈ 100 is of great importance showing the most striking change of the nuclear shape across isotopic chains [1,2,4,5]. In Rb, Sr, Y, and Zr isotopes, a sudden inversion of spherical and deformed configurations at the ground state was observed at N = 60.…”

Section: Introductionmentioning

confidence: 99%

Lifetime measurements in Rb96 via fast-timing techniques: Investigating shape coexistence at A≃100

Gamba,

Bottoni,

Iskra

et al. 2023

Phys. Rev. C

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“…Fission fragments cover a wide range of the nuclear chart and exhibit a variety of phenomena ranging from singleparticle excitations, near shell closures, to collective excitations related to nuclear vibrations or deformations. The γ-ray spectroscopy of fission fragments can be used to probe the evolution of nuclear structure properties as a function of excitation energy, angular momentum and neutron-proton asymmetry [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Advancements of $$\gamma $$-ray spectroscopy of isotopically identified fission fragments with AGATA and VAMOS++

et al. 2023

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γ-ray spectroscopy of fission fragments is a powerful method for studies of nuclear structure properties. Recent results on the spectroscopy of fission fragments, using the combination of the AGATA γ-ray tracking array and the VAMOS++ large acceptance magnetic spectrometer at GANIL, are reported. A comparison of the performance of the large germanium detector arrays EXOGAM and AGATA illustrates the advances in γ-ray spectroscopy of fission fragments. Selected results are highlighted for prompt γ-ray spectroscopy studies, measurements of short lifetimes of excited states with the Recoil Distance Doppler-Shift method, using both AGATA and VAMOS++ and prompt-delayed γ-ray spectroscopy studies using AGATA, VAMOS++ and EXOGAM.

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“…The structure of neutron-rich nuclei has been investigated for many years with gamma-ray spectroscopy techniques [1]. The region around mass 100 is of particular interest for drastic nuclear shape transitions, as in Zr isotopes [2].…”

Section: Introductionmentioning

confidence: 99%

Structure of neutron-rich Br and Nb nuclei populated in fission experiments

Colombi,

Reygadas,

Zanol

et al. 2023

J. Phys.: Conf. Ser.

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Spectroscopic information on exotic Br and Nb nuclei, with odd and even masses around A=100, respectively, was obtained by analyzing fission fragments data collected with AGATA+VAMOS++ at GANIL and the FIPPS spectrometer at ILL. The complementarity of these two state-of-the art setups has been used, for the first time, to investigate the structure of these neutron-rich fission fragments via gamma-ray spectroscopy. Details on the two fission experiments will be given, as well as examples of high-resolution gamma-ray spectra used for the reconstruction of the level schemes. The active fission target, used in the neutron-induced fission experiment at ILL, allowed for high-statistics prompt-delayed coincidences for the analysis of a new isomeric state in 100Nb. Evidence for a spherical isomeric state in 100Nb will be shown and discussed within the systematic of neighbouring nuclei.

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Gamma-ray spectroscopy of fission fragments with state-of-the-art techniques

Cited by 12 publications

References 384 publications

Lifetime measurements in Rb96 via fast-timing techniques: Investigating shape coexistence at A≃100

Lifetime measurements in Rb96 via fast-timing techniques: Investigating shape coexistence at A≃100

Advancements of $$\gamma $$-ray spectroscopy of isotopically identified fission fragments with AGATA and VAMOS++

Structure of neutron-rich Br and Nb nuclei populated in fission experiments

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