The nuclear structure of 66Se, nucleus beyond the N=Z line on the proton-rich side of the valley of stability, was investigated by the neutron knock-out reaction 67Se(12C,X)66Se using a 12C target. ...The analysis of the singles spectrum of the γ-rays emitted during the de-excitation of the populated low-lying excited states revealed two previously detected (927(4) keV, 1460(32) keV) and three new (744(6) keV, 1210(17) keV, 1661(23) keV) transitions. The 744-keV, the 1210-keV, and the 1460-keV transitions were found to be in coincidence with the one at 927 keV. The spectrum coincident with the 927-keV transition showed a further possible transition at 299(35) keV, which was obscured by significant atomic background in the singles spectrum. This transition might correspond to a peak previously reported at 273(5) keV that could not be assigned to 66Se unambiguously. Based on a comparison of the experimental data to theoretical calculations, four new excited states are proposed which suggest that 66Se exhibits shape coexistence.
The nuclear structure of 66 Se, nucleus beyond the N=Z line on the proton-rich side of the valley of stability, was investigated by the neutron knock-out reaction 67 Se( 12 C,X) 66 Se using a 12 C ...target. The analysis of the singles spectrum of the γ-rays emitted during the de-excitation of the populated low-lying excited states revealed two previously detected (927(4) keV, 1460(32) keV) and three new (744(6) keV, 1210(17) keV, 1661(23) keV) transitions. The 744-keV, the 1210-keV, and the 1460-keV transitions were found to be in coincidence with the one at 927 keV. The spectrum coincident with the 927-keV transition showed a further possible transition at 299(35) keV, which was obscured by significant atomic background in the singles spectrum. This transition might correspond to a peak previously reported at 273(5) keV that could not be assigned to 66 Se unambiguously. Based on a comparison of the experimental data to theoretical calculations, four new excited states are proposed which suggest that 66 Se exhibits shape coexistence.
Lithium ion battery materials improve the current technology to store electrical energy for the creation of green environment. The synthesis of lithium ion battery materials is crucial for energy ...applications in mobile electronic devices to plug-in hybrid electric vehicles. This review summarizes the recent progress made to synthesize lithium ion battery materials via supercritical fluid methods, and particularly, its application towards the synthesis of layered transition metal oxides, spinel structured cathodes, lithium metal phosphates, lithium metal silicates and lithium metal fluorophosphates. The structure, particle size, morphology and electrochemical properties of cathode materials are discussed. From the perspective of material synthesis, supercritical fluid methods are economical and have several advantages such as phase purity, morphology control and size tuning down to 5 nm, which would significantly impact the performance of lithium ion batteries.
Lifetime measurement of the 26 0 g.s. at SAMURAI Storck, S; Caesar, C; Kahlbow, J ...
27th International Nuclear Physics Conference, INPC 2019, Glasgow, United Kingdom,
12/2020, Letnik:
1643, Številka:
1
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
Abstract
The ground state of the neutron unbound nucleus
26
O is speculated to have a lifetime in the pico-second regime. In order to determine the decay lifetime of the
26
O ground state with high ...sensitivity and precision, a new method has been applied. The experiment was performed in December 2016 at the Superconducting Analyzer for MUlti-particle from Radio Isotope Beams (SAMURAI) at the Radioactive Isotope Beam Factory (RIBF) at RIKEN. A
27
F beam was produced in the fragment separator BigRIPS and impinged on a W/Pt target
26
O
26
O
outside the target. Thus, the velocity difference between the decay neutrons and the fragment 1 O delivers a characteristic spectrum from which the lifetime can be extracted.
The spin-isospin responses of the 11Li drip-line nucleus has been measured. Preliminary results of the 11Li(p, n)11Be experiment in inverse kinematics at RI Beam Factory (RIBF) of RIKEN Nishina ...Center are presented including the observation of 1n, 2n, t, d, 2α and 6He+α decay channels of 11Be reaction product. Details of the experimental setup based on PANDORA (Particle Analyzer Neutron Detector Of Real-time Acquisition) low-energy neutron detector and the SAMURAI large-acceptance magnetic spectrometer are described.
The large acceptance spectrometer SAMURAI plays an important role in experiments at RIBF, RIKEN for studying exotic nuclei far from β stability. We report here the investigation of the responses of ...the neutron detectors in the SAMURAI facility. The detection efficiency of a single neutron in the NEBULA neutron detector walls was determined to be 32.5 ± 0.3(stat) ± 0.9(syst)% by a measurement of the 7Li(p,n)7Be(g.s.+0.43MeV) reaction at 200 MeV. The effect of multiple hits caused by a single neutron in three-wall configuration of the NeuLAND demonstrator and NEBULA have been investigated in the 29Ne(p,2p) reaction at around 210 MeV/nucleon and analysis method has been developed enabling two or more neutron coincidence measurements. A simulation study for single and four neutron detection is reported. Finally, other recent progress and future perspectives are presented.
PDF
