Y. D. Sheng
A5082196225- Nuclear physics research studies
- Nuclear Physics and Applications
- Neutrino Physics Research
- Silicone and Siloxane Chemistry
- Astronomical and nuclear sciences
- Aerogels and thermal insulation
- Laser-Plasma Interactions and Diagnostics
- Surface Modification and Superhydrophobicity
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Advanced Chemical Physics Studies
- X-ray Spectroscopy and Fluorescence Analysis
- biodegradable polymer synthesis and properties
- Gamma-ray bursts and supernovae
- Synthesis and properties of polymers
- Nuclear reactor physics and engineering
- Enzyme Production and Characterization
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Quantum Chromodynamics and Particle Interactions
- Atomic and Molecular Physics
- Biofuel production and bioconversion
- Microbial Metabolic Engineering and Bioproduction
Central South University
2024-2025
Beijing Normal University
2021-2024
Nanjing Agricultural University
2024
Fluorine is one of the most interesting elements in nuclear astrophysics, where ^{19}F(p,α)^{16}O reaction crucial importance for Galactic ^{19}F abundances and CNO cycle loss first generation Population III stars. As a day-one campaign at Jinping Underground Nuclear Astrophysics experimental facility, we report direct measurements essential ^{19}F(p,αγ)^{16}O channel. The γ-ray yields were measured over E_{c.m.}=72.4-344 keV, covering Gamow window; our energy 72.4 keV unprecedentedly low,...
The ^{13}C(α,n)^{16}O reaction is the main neutron source for slow-neutron-capture process in asymptotic giant branch stars and intermediate process. Direct measurements at astrophysical energies above-ground laboratories are hindered by extremely small cross sections vast cosmic-ray-induced background. We performed first consistent direct measurement range of E_{c.m.}=0.24 to 1.9 MeV using accelerators China Jinping Underground Laboratory Sichuan University. Our covers almost entire Gamow...
Aerogels are regarded as the next generation of thermal insulators; however, conventional aerogels suffer from issues such brittleness, low moisture resistance, and a complex production process. Subnanowires (SNWs) emerging materials known for their exceptional flexibility, toughness, intrinsic hydrophobicity, gelling capabilities, making them ideal building blocks flexible, tough, hydrophobic, thermally insulating aerogels. Herein, we present simple scalable strategy to construct SNW by...
The ^{18}O(α,γ)^{22}Ne reaction is critical for AGB star nucleosynthesis due to its connection the abundances of several key isotopes, such as ^{21}Ne and ^{22}Ne. However, ambiguous resonance energy spin-parity dominant 470 keV leads substantial uncertainty in rate temperature interest. We have measured energies strengths low-energy resonances at Jinping Underground Nuclear Astrophysics experimental facility (JUNA) with improved precision. has been be E_{α}=474.0±1.1 keV, high precision...
$^{26}\mathrm{Al}$ with a half-life of $7.17\ifmmode\times\else\texttimes\fi{}{10}^{5}$ years is one the most significant nuclides in $\ensuremath{\gamma}$-ray astronomy and presolar grains meteorites. Its main production mechanism $\mathrm{H}$-burning MgAl cycle $^{25}\mathrm{Mg}(p,\ensuremath{\gamma})^{26}\mathrm{Al}$ reaction. In temperature region 0.05--0.3 GK astrophysical interest, reaction rate dominated by resonant capture several low-energy resonances. this work, we report results...
Fluorine is one of the most interesting elements in nuclear astrophysics. The $^{19}\mathrm{F}(p,\ensuremath{\alpha})^{16}\mathrm{O}$ reaction astrophysical importance addressing fluorine abundances universe and CNO material loss first generation stars. As a day-1 campaign Jinping Underground Nuclear Astrophysics experiment facility (JUNA), we report full direct measurement results $^{19}\mathrm{F}(p,\ensuremath{\alpha}\ensuremath{\gamma})^{16}\mathrm{O}$ reaction, which important channels...
At present, the mainstream industrial synthesis method of polyamide is still bulk fusion polymerization, which not in line with concept green because high threshold reaction conditions and large energy consumption. Based on this, a new route elastomer was studied this paper. By synthesizing end-functionalized long carbon chain diacrylamide (DDA) containing amide bonds, mechanism made by thiol double bond Michael addition reaction. A series elastomers different ratios hard soft segments were...
The solar composition problem has puzzled astrophysicists for more than 20 years. Recent measurements of carbon-nitrogen-oxygen (CNO) neutrinos by the Borexino experiment show a $\sim2\sigma$ tension with "low-metallicity" determinations. $^{14}$N$(p,\gamma)^{15}$O, slowest reaction in CNO cycle, plays crucial role standard model (SSM) calculations neutrino fluxes. Here we report direct measurement $^{14}$N$(p,\gamma)^{15}$O reaction, which $S$-factors all transitions were simultaneously...
Abstract Advanced aerogels hold immense potential in thermal insulation. However, achieving high environmental adaptability aerogel insulators with elasticity, hydrophobicity, flame‐retardancy, and low temperature tolerance remains a significant challenge. Inspired by “brick‐mortar‐binder” biomimetic texture, layered double hydroxide/carboxylated cellulose nanofibers/Si–O–Si (LCS) hybrid is developed bottom‐up freeze‐drying. Owing to the distinct building blocks organized structure,...
22 Ne( α , n ) 25 Mg is one of the main neutron sources s process. Ne produced by 14 N( γ 18 F( β + O( reaction chain in helium burning, thus, production rate dominated F and Ne. At astrophysical relevant temperatures, rates are determined several low-energy resonances. In this work, was measured at 400 kV accelerator Jinping Underground Nuclear Astrophysics experiment (JUNA). The -ray yields resonances between 470 to 770 keV were obtained.
The cosmic 1.809 MeV γ -ray emitted by the radioactive nucleus 26 Al in Galaxy is one of key observation targets γ-ray astronomy. mainly produced 25 Mg(p, ) reaction stellar Mg-Al cycle. At astrophysical relevant temperatures, rates are dominated several narrow resonances at low energy. This work reports a measurement energy Jinping Underground Nuclear Astrophysics experimental facility (JUNA) China Laboratory (CJPL).
The 19 F( p , αγ ) 16 O reaction is of crucial importance for Galactic F abundances and CNO cycle loss in first generation Population III stars. Due to its extremely small cross sections, the has not been measured low energy part Gamow window(70-200 keV). As a day-one campaign, experiment was performed under cosmicray-induced background environment China JinPing Underground Laboratory(CJPL), one deepest underground laboratories world. γ -ray yields were over E c . m =72.4–344 keV, covering...