A5009803343- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Atomic and Subatomic Physics Research
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- High-pressure geophysics and materials
- Fault Detection and Control Systems
- Computational Physics and Python Applications
- Advanced NMR Techniques and Applications
- Magnetic Field Sensors Techniques
- Adaptive Control of Nonlinear Systems
- Geochemistry and Geologic Mapping
- Medical Imaging Techniques and Applications
- Stability and Control of Uncertain Systems
- X-ray Spectroscopy and Fluorescence Analysis
- Privacy-Preserving Technologies in Data
Liaoning Normal University
2023-2025
Beijing Forestry University
2024
China Three Gorges University
2020-2024
China Energy Engineering Corporation (China)
2024
Joint Institute for Nuclear Research
2024
Institute of High Energy Physics
2024
Henan University
2023
Inner Mongolia University
2023
University of Turin
2023
State Key Laboratory of Nuclear Physics and Technology
2019-2022
A new short-lived neutron-deficient isotope Np220 was synthesized in the fusion-evaporation reaction Re185(Ar40,5n)Np220 at gas-filled recoil separator SHANS. Based on measurement of correlated α-decay chains, decay properties with Eα=10040(18) keV and T1/2=25−7+14 μs were determined, which are good agreement theoretical predictions. From experimental results coupled recently reported data Np219,223, systematics for Np isotopes around N=126 established, allows us first time to test...
$\ensuremath{\beta}$-delayed one-proton emissions of $^{22}\mathrm{Si}$, the lightest nucleus with an isospin projection ${\mathrm{T}}_{z}=\ensuremath{-}3$, are studied a silicon array surrounded by high-purity germanium detectors. Properties $\ensuremath{\beta}$-decay branches and reduced transition probabilities for transitions to low-lying states $^{22}\mathrm{Al}$ determined. Compared mirror $\ensuremath{\beta}$ decay $^{22}\mathrm{O}$, largest value asymmetry in far,...
Abstract Eclogites and granulites are fossil records of orogenies provide crucial evidence geodynamic processes. Incomplete knowledge on both hampers the establishment detailed tectonothermal models for central Himalaya. Utilizing petrography, pseudosection modelling, mineral thermometers, zircon petrochronology, granulitized eclogites discovered firstly at Yadong region southern tip Yadong–Gulu Rift record five metamorphic stages. The epidote–amphibole eclogite facies metamorphism (M1) is...
Background: Beta-decay spectroscopy provides valuable nuclear physics input for thermonuclear reaction rates of astrophysical interest and stringent test shell-model theories far from the stability line. Purpose: The available decay properties proton drip-line nucleus $^{27}$S is insufficient to constrain key resonance in $^{26}$Si$(p,\gamma)^{27}$P rate probe possible isospin asymmetry. scheme complicated being understood, which has motivated but also presented challenges our experiment....
The β-delayed γ-ray spectroscopy of neutron-rich ^{123,125}Ag isotopes is investigated at the Radioactive Isotope Beam Factory RIKEN, and long-predicted 1/2^{-} β-emitting isomers in are identified for first time. With new experimental results, systematic trend energy spacing between lowest 9/2^{+} levels extended Ag up to N=78, providing a clear signal reduction Z=40 subshell gap towards N=82. Shell-model calculations with state-of-the-art V_{MU} plus M3Y spin-orbit interaction give...
This paper reports a series of experimental studies on the vibration characteristics circular cylindrical shells containing water under axial excitation. The conditions for formation bubble clusters in fluid during and interaction between shell are investigated. pressure distributions strains tank correlated. Dynamic responses after observed. wave velocity liquid-container system is also determined. It was found that equation derived, based one-dimensional strain, could be made to agree with...
Abstract Eclogites represent the highest pressure conditions yet observed from rocks thrust to surface in central Himalaya. A detailed investigation of protolith nature these eclogites is needed better understand pre-Himalayan geological history. Retrogressed were collected Thongmön (Dingri County) and Riwu (Dinggye County), Himalaya, China. We investigated bulk rock major trace elements, Sr-Nd isotopes, zircon geochronology, Hf-O isotopes. These retrogressed experienced five stages...
In this paper, we study non-fragile observers for a class of nonlinear systems with sampled outputs and unknown measurement noise. After an output filtering transformation, extended system is constructed. The noise are transformed into the state equation system. Then, observer designed to estimate states system, estimated by first-order estimator. On basis time-varying matrix inequality (TMI), it proven that can track well even if there gain perturbations measured Finally, dynamic model used...
The mass of $^{27}$P was predicted to impact the X-ray burst (XRB) model predictions light curves and composition ashes. To address uncertainties inconsistencies in reported masses literature, a wealth information has been extracted from $\beta$-decay spectroscopy drip-line nucleus $^{27}$S. We determine most precise excess date be $-659(9)$~keV, which is 63~keV (2.3$\sigma$) higher than AME2016 recommended value $-722(26)$~keV. experimentally unknown $^{27}$S estimated 17030(400)~keV...
$\beta$ decay of $^{26}$P was used to populate the astrophysically important $E_x=$5929.4(8) keV $J^{\pi}=3{^+}$ state $^{26}$Si. Both $\beta$-delayed proton at 418(8) and gamma ray 1742(2) emitted from this were measured simultaneously for first time with corresponding absolute intensities 11.1(12)\% 0.59(44)\%, respectively. Besides, shell model calculations weakly bound effects performed investigate properties other resonant states a spin-parity $4^+$ rather than $0^+$ favored...
Abstract Sitting between the Greater Himalayan sequence (GHS) and Lesser (LHS), Main Central Thrust zone (MCTZ) has experienced multiple episodes of anatexis, which presents an opportunity to explore nature partial melting its response orogenic processes. A series deformed rocks, including migmatites, gneisses, leucosomes were collected across MCT at Arun Valley, eastern Nepal. We investigated bulk rock major trace elements, Sr-Nd isotopes, mineral chemistry, zircon geochronology Hf...
A new transition is reported in the beta-delayed neutron decay of 18N. The observed energy 3.78±0.05 MeV with a branching ratio 0.05±0.03%, which corresponds to an excitation 12.05±0.05 daughter nucleus 18O. log ft value this 5.24±0.3, which, together previously electron scattering data, determines Jπ level be 1−. experimental data are compared shell model calculations different spaces.Received 5 November 2006DOI:https://doi.org/10.1103/PhysRevC.75.057302©2007 American Physical Society
β decay of proton-rich nuclei plays an important role in exploring isospin mixing. The ^{26}P at the proton drip line is studied using double-sided silicon strip detectors operating conjunction with high-purity germanium detectors. T=2 isobaric analog state (IAS) 13 055 keV and two new high-lying states 380 11 912 ^{26}Si are unambiguously identified through β-delayed two-proton emission (β2p). Angular correlations protons emitted from excited populated by measured, which suggests that...
The $\ensuremath{\beta}$-delayed two-proton ($\ensuremath{\beta}2p$) decay of $^{27}\mathrm{S}$ was studied using a state-of-the-art silicon array and Clover-type HPGe detectors. An energy peak at 6372(15) keV with branching ratio 2.4(5)% in the decay-energy spectrum identified as transition via isobaric-analog state $^{27}\mathrm{P}$ to ground $^{25}\mathrm{Al}$ $\ensuremath{\beta}$ $^{27}\mathrm{S}$. Two-proton angular correlations were measured by study mechanism emission. Based on...
A detailed $\ensuremath{\beta}$-decay spectroscopic study of $^{22}\mathrm{Al}$ was performed at the Radioactive Ion Beam Line in Lanzhou. With $\ensuremath{\beta}\text{\ensuremath{-}}\ensuremath{\gamma}$-particle coincidence measurement by a high-resolution DSSD particle detection array and high efficiency $\ensuremath{\gamma}$-ray array, total eight excited states $^{22}\mathrm{Mg}$ fed Gamow-Teller transitions newly identified. The one-proton, two-proton, $\ensuremath{\alpha}$ decays IAS...
The spectroscopy of $^{79}\mathrm{Se}$ is studied via the $^{82}\mathrm{Se}(\ensuremath{\alpha}$, $\ensuremath{\alpha}3n$)$^{79}\mathrm{Se}$ fusion-evaporation reaction. A negative-parity magnetic dipole band in established for first time. Based on calculations by self-consistent tilted axis cranking covariant density functional theory, this new can be classified as a ``stapler'' band, which has relatively stable symmetric prolate deformation function rotational frequency. Hence, it...
The study of the origin asymmetries in mirror β decay is extremely important to understand fundamental nuclear force and structure. experiment was performed at National Laboratory Heavy Ion Research Facility Lanzhou (HIRFL) measure β-delayed γ rays 26P by silicon array Clover-type high-purity Germanium (HPGe) detectors. Combining with results from its nucleus 26Na, asymmetry parameter δ ( ≡ft+/ft−− 1) determined be 46(13)% for transition feeding first excited state daughter nucleus. Our...
在藏南亚东地区榴辉岩中新识别出的超高温变质作用拓展了对喜马拉雅这一正在进行中的陆陆碰撞造山带的认识,但是对于该超高温变质作用的时代及热源目前仍缺乏限定。本文在藏南亚东地区超高温叠加的榴辉岩中发现了一种文象结构的浅色体。该浅色体由大量文象结构的斜长石、石英以及中条纹长石组成,是变质熔体冷却结晶的产物。通过详细的矿物学、地球化学、地质温度计和锆石年代学研究发现:该熔体最初是由片麻岩部分熔融产生,在榴辉岩相条件下侵入榴辉岩,体系的温度在~16Ma时至少为900℃;随后发生近等温降压折返,在~15Ma时温度仍保持在~950℃,并开始冷却结晶。由于被侵入的榴辉岩在~17Ma时温度仅为750℃,说明该地区的岩石在大约2Myr的时间内温度升高了200℃,要求有异常热源提供热量。结合区域上在具有时空一致性的南北向裂谷和可能的俯冲印度岩石圈的撕裂,由此导致的软流圈上涌可以作为喜马拉雅中部的榴辉岩在早中新世快速升温达到超高温变质作用叠加的热源,对喜马拉雅造山带的演化具有重要意义。
The spectroscopy of 62Cu is studied via the 54Cr(12C,1p3n)62Cu fusion-evaporation reaction. On basis γ−γ coincidence analysis, angular distributions from oriented states, and linear polarization measurement, three positive-parity negative-parity level sequences in are observed, including two new γ-ray transitions one level. collective structures discussed terms tilted axis cranking covariant density functional theory. Although not firmly confirmed experiment, properties a magnetic rotational...
To improve the measurement precision of proton magnetometer (PM), a multi-average multi-cycle frequency (M-MFM) method using both rising and falling edge square wave is proposed in this study. First, M-MFM Rising-Falling presented based on (MFM) method, formula deduced. Then, relative error analyzed, optimized by solving minimum value formula. Finally, implementation process STM32 introduced. The experimental results demonstrate that for low SNR sine signals significantly increased method....