A5063980200- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Advanced NMR Techniques and Applications
- Advanced Chemical Physics Studies
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Inorganic Fluorides and Related Compounds
- graph theory and CDMA systems
- Graph theory and applications
- Ionosphere and magnetosphere dynamics
- Radiopharmaceutical Chemistry and Applications
- Atomic and Subatomic Physics Research
- Finite Group Theory Research
- Interactive and Immersive Displays
- X-ray Spectroscopy and Fluorescence Analysis
- Random Matrices and Applications
- Interconnection Networks and Systems
- Quantum, superfluid, helium dynamics
- Radioactive Decay and Measurement Techniques
- Nuclear reactor physics and engineering
- Computer Graphics and Visualization Techniques
- Atmospheric chemistry and aerosols
University of Birmingham
2014-2023
Westinghouse Electric (United States)
1964
Method: To examine signatures of this alpha-condensation, a compound nucleus reaction using 160, 280, and 400 MeV 16O beams impinging on carbon target was used to investigate the 12C(16O,7a) reaction. This permits search for near-threshold states in alpha-conjugate nuclei up 24Mg. Results: Events an alpha-particle multiplicity 7 were measured results compared both Extended Hauser-Feshbach calculation Fermi break-up model. The distribution exceeded that predicted from sequential decay...
States in the astrophysically important $^{19}\mathrm{Ne}$ nucleus have been populated directly using $^{15}\mathrm{O}(\ensuremath{\alpha},\phantom{\rule{0.16em}{0ex}}\ensuremath{\alpha})^{15}\mathrm{O}$ reaction with a radioactive $^{15}\mathrm{O}$ beam. Due to challenges involved, this represents first such measurement high resolution and dedicated exploring cluster structure. This comprises three experiments: develop beam, second resonant scattering study, third measure precise energy...
A novel technique has been developed, making use of the continuous wavelet transform to identify $\ensuremath{\alpha}$-clustered states from resonant scattering measurements in regions high nuclear state density. This expedites investigation $\ensuremath{\alpha}$ clustering medium mass and heavy nuclei where role that plays structure nucleus is poorly understood. Here, we report application this $^{4}\mathrm{He}(^{40,44,48}\mathrm{Ca},\ensuremath{\alpha})$ reactions, leading an assessment...
The first investigation of the single-particle structure bound states 17C, via d(16C, p) transfer reaction, has been undertaken. measured angular distributions confirm spin-parity assignments 1/2+ and 5/2+ for excited located at 217 335 keV, respectively. spectroscopic factors deduced these exhibit a marked character, in agreement with shell model particle-core calculations, combined their near degeneracy energy provide clear evidence absence N = 14 sub-shell closure. very small factor found...
Measurements were made of the differential cross section resonant reactions ${}^{4}\mathrm{He}({}^{14}\mathrm{N},\ensuremath{\alpha})$ and, ${}^{4}\mathrm{He}({}^{14}\mathrm{N},d){}^{16}\mathrm{O}$ with intention investigating compound nucleus $^{18}\mathrm{F}$. These measurements performed in inverse kinematics at a center-of-mass scattering angle ${\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}={180}^{\ensuremath{\circ}}$ by using thick $^{4}\mathrm{He}$ gas target and $^{14}\mathrm{N}$...
Abstract A novel experimental analysis method has been developed, making use of the continuous wavelet transform and machine learning to rapidly identify $$\alpha $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>α</mml:mi> </mml:math> -clustering in nuclei regions high nuclear state density. This technique was applied resonant scattering measurements $$^\text {4}$$ <mml:msup> <mml:mrow /> <mml:mtext>4</mml:mtext> </mml:msup> He( {40,44,48}$$...
Clustering in $^{18}\mathrm{O}$ is of great interest to the nuclear physics community, due theoretical predictions $\mathrm{core}+\ensuremath{\alpha}$ and molecular structures. An experiment was performed order measure branching ratios for states $^{18}\mathrm{O}$, determining tendency towards clustering based on value ${\mathrm{\ensuremath{\Gamma}}}_{\ensuremath{\alpha}}/{\mathrm{\ensuremath{\Gamma}}}_{\text{tot}}$ each state, reduced widths compared Wigner limit. experimental method that...
We review some of the key experimental and theoretical studies α-clustering in 18F. Particular attention is given to 4p-2h nature such α-clustered states, interaction between holes clusters examined terms both weak strongcoupling regimes. The work focuses on α-transfer spectroscopy α resonant scattering as tools for investigating α-clustering.
The low-lying structure of $^{15}$C has been investigated via the neutron-removal $^{16}$C$(d,t)$ reaction. Along with bound neutron sd-shell hole states, unbound p-shell states have firmly confirmed. excitation energies and deduced spectroscopic factors cross-shell are an important measure $[(p)^{-1}(sd)^{2}]$ configurations in $^{15}$C. Our results show a very good agreement shell-model calculations using SFO-tls interaction for However, modification $p$-$sd$ $sd$-$sd$ monopole terms was...
Measurement was conducted at the INFN-LNL, employing a Tandem accelerator to achieve 95 MeV 14 N beam focused on 10 B target (201 µg/cm²) with aim explore cluster structures of light carbon isotopes. The main focus this report will be 13 C nucleus. Data were collected six-telescope detection system that allowed for observation many-body exit channels. Here are presented some results data analysis excited states from reactions two and three products in channel. In B( N, 11 C) reaction,...
Abstract An experiment has been performed utilising the $$^{12}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mn>12</mml:mn> </mml:msup> </mml:math> C( $$^{7}$$ <mml:mn>7</mml:mn> Li, p ) $$^{18}$$ <mml:mn>18</mml:mn> O reaction to populate high-energy states in O. Using Munich Q3D magnetic spectrograph conjunction with Birmingham large-angular-coverage DSSD array, branching ratios have measured for over fifty O, investigating $$\alpha $$...
The main idea of the two presented experiments is to study decay resonances in 24Mg at excitation energies above 12C+12C threshold, astrophysical energy region interest. measurement 12C(16O, gamma)24Mg* reaction was performed INFN-LNS Catania. Only alpha+20Ne channel here, because it a motivation for conducting new experiment, the4He(20Ne, 4He)20Ne reaction, INFN-LNL Legnaro. Some preliminary results this are also presented.
An experiment was performed to investigate α-condensate states via high α-particle multiplicity breakup. The nucleus of interest 28Si therefore measure 7 particle breakup events, a highly granular detector with solid angle coverage required. For this purpose, the CHIMERA and FARCOS detectors at INFN LNS were employed. Particle identification achieved through ΔE-E energy loss. measured three beam energies different excitation regimes in 28Si. At where is sufficient provide α-particles enough...
A series of proposed bands in 18O with potential nuclear molecular structures, such as 14C ⊗ α or 12C 2n α, are being investigated. This was done through the use Q3D magnetic spectrograph at Maier-Leibnitz Laboratory Munich conjunction an array double-sided silicon strip detectors (DSSDs). These allowed for high resolution reconstruction detected particles, enabling measurement branching ratios states that make up these bands. Here, a method is discussed extracting both material particles...
Abstract The investigation of nuclei with potential α -cluster structure is great importance to the understanding nuclear structure, both in testing theoretical models and for study synthesis elements stars. 18 O nucleus an excellent candidate test such a system, experiment has been performed order determine validity proposed cluster bands O, by measuring absolute branching ratios high-energy excited states. In accurately measure these ratios, Monte-Carlo techniques have employed allowing...
Measurements were made of the 4He(40,44,48Ca,α) resonant scattering reactions at 180° and up to Ec.m. ~ 11.5MeV, using Thick Target Inverse Kinematics technique. These measurements are discussed, with a focus on assessing their usefulness for investigating α-clustering in medium mass 44,48,52Ti nuclei.
The low-lying structure of 15 C has been investigated via the neutron-removal d( 16 C, t) reaction. experiment was performed at GANIL using a secondary beam produced by fragmentation in LISE spectrometer 17.2 MeV/nucleon with an intensity 5 × 10 4 pps and 100% purity. angle energy light ejectile were detected three MUST2 telescopes. missing mass technique used to reconstruct excitation C. In this spectrum, two bound states observed (gs first excited state) unbound resonant above neutron...
Clustering phenomena are well known in nuclear physics for stable nuclei, both α-conjugate (N=Z, A=2N), like8Be,16O,20Ne, and non-α-conjugate, like6Li and7Li. In general, it is expected that light exotic nuclei may also exhibit cluster behavior. Moving out of the valley stability configurations can be found where at least one clusters unbound or weakly bound, thus not satisfying strong internal correlation requirement classical clusters. This so-called clustering. The study such systems...
The elastic scattering excitation function for15O on4He was measured - for the first time by using Inverse Kinematic Thick Target method. obtained spectrum analysed in an R-matrix framework providing spectroscopic information several states energy of nucleus19Ne from 4.8 to 9 MeV. Eight them are newly observed states. set-up and experimental technique will be described detail results shown discussed.
Two methods are given for generating clock-derived, programed, electrical pulses which used to determine the on-and-off shuttering periods of scanned image and display devices. Actual equipment utilizing these programing is also illustrated, along with some applications use such in evaluation storage tubes.
The determination of absolute branching ratios for high-energy states in light nuclei is an important and useful tool probing the underlying nuclear structure individual resonances: example, establishing tendency excited state towards $\alpha$-cluster structure. Difficulty arises measuring these due to similarities available decay channels, such as ($\mathbf{^{18}}$O,$\mathbf{n}$) ($\mathbf{^{18}}$O,$\mathbf{2n}$), well differences geometric efficiencies population bound levels daughter...