Nuclear fragments in projectile fragmentation reactions

Ma, Can; Wei, Hui-Ling; Liu, Xingquan; Su, Jun; Zheng, Hua; Lin, Weiping; Zhang, Yingxun

doi:10.1016/j.ppnp.2021.103911

Cited by 48 publications

(18 citation statements)

References 193 publications

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“…Generally, the half-lives of proton-rich nuclei decrease under the increase in proton-neutron asymmetry, and the span ranges from 10 1 s to 10 −22 s. Therefore, different production mechanisms, detection methods, and technologies [105][106][107][108][109] are used for such nuclei in experiments, depending on the half-life. In early years, light particle-emission nuclei (e.g., 6 Be and 12 O) were produced by transfer reactions with protons or 3 He beams [22,25].…”

Section: Iii1 Measurement In Experimentsmentioning

confidence: 99%

Recent progress in two-proton radioactivity

et al. 2022

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During the last few decades, rare isotope beam facilities have provided unique data for studying the properties of nuclides located far from the beta-stability line. Such nuclei are often accompanied by exotic structures and radioactive modes, which represent the forefront of nuclear research. Among them, two-proton (2p) radioactivity is a rare decay mode found in a few highly proton-rich isotopes. The 2p decay lifetimes and properties of emitted protons hold invaluable information regarding the nuclear structures in the presence of a low-lying proton continuum; as such, they have attracted considerable research attention. In this review, we present some of the recent experimental and theoretical progress regarding the 2p decay, including technical innovations for measuring nucleonnucleon correlations and developments in the models that connect their structural aspects with their decay properties. This impressive progress should play a significant role in elucidating the mechanism of these exotic decays, probing the corresponding components inside nuclei, and providing deep insights into the open quantum nature of dripline systems.

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Section: Iii1 Measurement In Experimentsmentioning

confidence: 99%

Recent progress in two-proton radioactivity

et al. 2022

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“…One of the experimental focuses in current nuclear physics is to determine the fragmentation cross sections of nuclei with different isospins and masses [1]. The nuclei of interest can be produced via projectile fragmentation.…”

Section: Introductionmentioning

confidence: 99%

New measurement of the elemental fragmentation cross sections of 218 MeV/nucleon 28 Si on a carbon target

Li,

Su,

Sun

et al. 2023

Preprint

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Elemental fragmentation cross sections (EFCSs) of stable and unstable nuclides have been investigated with various projectile-target combinations at a wide range of incident energies. These data are critical to constrain and develop the theoretical reaction models and to study the propagation of galactic cosmic rays (GCR). In this work, we present a new EFCS measurement for 28 Si on carbon at 218 MeV/nucleon performed at the Heavy Ion Research Facility (HIRFL-CSR) complex in Lanzhou. The impact of the target thickness has been well corrected to derive an accurate EFCS. Our present results with charge changes ∆Z = 1-6 are compared to the previous measurements and to the predictions from the models modified EPAX2, EPAX3, FRACS, ABRABLA07, NUCFRG2, and IQMD coupled with GEMINI (IQMD+GEMINI). All the models fail to describe the odd-even staggering strength in the elemental distribution, with the exception of the IQMD+GEMINI model, which can reproduce the EFCSs with an accuracy of better than 3.5% for ∆Z ≤ 5. The IQMD+GEMINI analysis shows that the odd-even staggering in EFCSs occurs in the sequential statistical decay stage rather than in the initial dynamical collision stage. This offers a reasonable approach to understand the underlying mechanism of fragmentation reactions.

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“…The attempt of observing peculiar properties of unstable nuclei, not observed in the stable ones, is the compass of such strong interest. Most of the current knowledge on the nuclear structure is limited to nuclei close to the stability valley, and only surveys made possible by the availability of RIBs allow for further exploring such knowledge in uncharted territories of the nuclei chart [1][2][3][4][5][6]. The presence of molecular structures of α clusters, which might lead to special excited states, such as rotational bands, is among the phenomena to be possibly investigated in unstable nuclei [7,8].…”

Section: Introductionmentioning

confidence: 99%

Radioactive ion beam opportunities at the new FRAISE facility of INFN-LNS

Martorana

Cardella²,

Guazzoni³

et al. 2022

Front. Phys.

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At the Laboratori Nazionali del Sud of INFN (INFN-LNS) in Catania, the construction of the new Radioactive Ion Beams (RIBs) facility FRAISE (FRAgment In-flight SEparator) has reached its ending phase. The facility uses the in-flight technique based on a primary beam fragmentation impinging on light Be or C targets. FRAISE makes use of light and medium mass primary beams, having power up to ≈ 2–3 kW, leading to RIBs, whose intensities vary in the range of ≈ 103–107 pps, for nuclei far from and close to the stability valley, respectively. FRAISE aims at providing high-intensity and high-quality RIBs for nuclear physics experiments, also serving to interdisciplinary research areas, such as medical physics. Critical aspects for high-quality beams are the tuning and transport, representing time-consuming processes and requiring dedicated diagnostics and tagging devices measuring many features of RIBs. Some of these devices should be capable to operate in radioactively activated environments because of the expected 2 kW beam lost in the dipole after the production target. Due to its peculiar robustness to radioactive damage, Silicon Carbide (SiC) technology has been considered for the detection layer. In this view, an R&D campaign has been started aiming at developing the FRAISE facility, the new diagnostics system, and a new tagging device, the latter of which will be useful for the CHIMERA multidetector beamline. In this paper, we discuss the status and the perspectives of the facility with a focus on the RIBs opportunities.

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Nuclear fragments in projectile fragmentation reactions

Cited by 48 publications

References 193 publications

Recent progress in two-proton radioactivity

Recent progress in two-proton radioactivity

New measurement of the elemental fragmentation cross sections of 218 MeV/nucleon 28 Si on a carbon target

Radioactive ion beam opportunities at the new FRAISE facility of INFN-LNS

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