Xianglun Wei
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View article: Simulation of radiation environment for the beam monitor of CEE experiment
Simulation of radiation environment for the beam monitor of CEE experiment Open
The cooling storage ring external-target experiment is a large-scale nuclear physics experiment, which aims to study the physics of heavy-ion collisions at low temperatures and high baryon densities. A beam monitor (BM) is placed in the be…
View article: Design and performance of the prototype gaseous beam monitor with GEM and pixel sensors for the CSR external-target experiment
Design and performance of the prototype gaseous beam monitor with GEM and pixel sensors for the CSR external-target experiment Open
A gaseous beam monitor utilizing gas electron multiplier (GEM) and pixel sensors is being developed for the Cooling Storage Ring (CSR) External-target Experiment (CEE) at Heavy Ion Research Facility in Lanzhou (HIRFL). The beam monitor is …
View article: Measurement of Ion Mobilities for the Ion-TPC of NvDEx Experiment
Measurement of Ion Mobilities for the Ion-TPC of NvDEx Experiment Open
In the NνDEx collaboration, a high-pressure gas TPC is being developed to search for the neutrinoless double beta decay. The use of electronegative 82SeF6 gas mandates an ion-TPC. The reconstruction of the z coordinate is to be realized by…
View article: Slow control system of CEE-TPC
Slow control system of CEE-TPC Open
View article: Extract neutron-neutron interaction strength and spatial-temporal dynamics of neutron emission from two-particle correlation function
Extract neutron-neutron interaction strength and spatial-temporal dynamics of neutron emission from two-particle correlation function Open
The neutron-neutron ($nn$) correlation function has been measured in 25 MeV/u $^{124}$Sn+$^{124}$Sn reactions. Using the Lednický-Lyuboshitz approach, the $nn$ scattering length and effective range ($f_{0}^{nn}$, $d_{0}^{nn}$), as well as …
View article: Measurement of gas properties for the ion-TPC of N$ν$DEx experiment
Measurement of gas properties for the ion-TPC of N$ν$DEx experiment Open
In the N$ν$DEx collaboration, a high-pressure gas TPC is being developed to search for the neutrinoless double beta decay. The use of electronegative $\mathrm{^{82}SeF_{6}}$ gas mandates an ion-TPC. The reconstruction of $z$ coordinate is …
View article: Erratum to “Probing high-momentum component in nucleon momentum distribution by neutron-proton bremsstrahlung γ-rays in heavy ion reactions” [Phys. Lett. B 850 (2024) 138514]
Erratum to “Probing high-momentum component in nucleon momentum distribution by neutron-proton bremsstrahlung γ-rays in heavy ion reactions” [Phys. Lett. B 850 (2024) 138514] Open
View article: The neutron array of the compact spectrometer for heavy ion experiments in Fermi energy region
The neutron array of the compact spectrometer for heavy ion experiments in Fermi energy region Open
The emission of neutrons from heavy ion reactions is an important observable for studying the asymmetric nuclear equation of state and the reaction dynamics. A 20-unit neutron array has been developed and mounted on the compact spectromete…
View article: Beam test results of the prototype of the multi wire drift chamber for the CSR external-target experiment
Beam test results of the prototype of the multi wire drift chamber for the CSR external-target experiment Open
The half-size prototype of the multi wire drift chamber (MWDC) for the cooling storage ring (CSR) external-target experiment (CEE) was assembled and tested in 350 MeV/u Kr+Fe reactions on the heavy ion research facility in Lanzhou (HIRFL).…
View article: Probing high-momentum component in nucleon momentum distribution by neutron-proton bremsstrahlung γ-rays in heavy ion reactions
Probing high-momentum component in nucleon momentum distribution by neutron-proton bremsstrahlung γ-rays in heavy ion reactions Open
The high momentum tail (HMT) of nucleons, as a signature of the short-range correlations in nuclei, has been investigated by the high-energy bremsstrahlung γ rays produced in 86Kr+124Sn at 25 MeV/nucleon. The energetic photons are measured…
View article: The development of segmented electrode thin-film parallel plate avalanche counter (PPAC)
The development of segmented electrode thin-film parallel plate avalanche counter (PPAC) Open
In order to improve the counting rate and position resolution of the Parallel Plate Avalanche Counter (PPAC) within the Compact Spectrometer for Heavy Ion Experiment, a new strip film-structured PPAC has been developed. The developped PPAC…
View article: Development of a semi-cylindrical time projection chamber prototype for ($$^{3}{\textrm{He}},t$$) charge exchange reaction experiment
Development of a semi-cylindrical time projection chamber prototype for ($$^{3}{\textrm{He}},t$$) charge exchange reaction experiment Open
The charge exchange (CE) reaction is an effective probe to study the structure of atomic nuclei in the isospin dimension, which has been studied for decades. To expand the range of nuclei studied by CE reactions to a wider range and resear…
View article: Revisit to the yield ratio of triton and $^3$He as an indicator of neutron-rich neck emission
Revisit to the yield ratio of triton and $^3$He as an indicator of neutron-rich neck emission Open
The neutron rich neck zone created in heavy ion reaction is experimentally probed by the production of the $A=3$ isobars. The energy spectra and angular distributions of triton and $^3$He are measured with the CSHINE detector in $^{86}$Kr …
View article: Variation of Tensor Force due to Nuclear Medium Effect
Variation of Tensor Force due to Nuclear Medium Effect Open
The enhancement of $J^π(T)$=3$^{+}$(0) state with isospin $T=0$ excited by the tensor force in the free $^{6}$Li nucleus has been observed, for the first time, relative to a shrinkable excitation in the $^{6}$Li cluster component inside it…
View article: Aspect of Clusters Correlation at Light Nuclei Excited State
Aspect of Clusters Correlation at Light Nuclei Excited State Open
The correlation of $αα$ was probed via measuring the transverse momentum $p_{T}$ and width $δp_{T}$ of one $α$, for the first time, which represents the spatial and dynamical essentialities of the initial coupling state in $^{8}$Be nucleus…
View article: Multi-alpha Boson Gas state in Fusion Evaporation Reaction and Three-body Force
Multi-alpha Boson Gas state in Fusion Evaporation Reaction and Three-body Force Open
The experimental evidence for the $α$ Boson gas state in the $^{11}$C+$^{12}$C$\rightarrow$$^{23}$Mg$^{\ast}$ fusion evaporation reaction is presented. By measuring the $α$ emission spectrum with multiplicity 2 and 3, we provide insight in…
View article: The trigger system for the CSR external-target experiment
The trigger system for the CSR external-target experiment Open
A trigger system has been designed and implemented for the HIRFL-CSR external target experiment (CEE), the spectrometer for studying nuclear matter properties with heavy ion collisions in the GeV energy region. The system adopts master-sla…
View article: Probing high-momentum component in nucleon momentum distribution by neutron-proton bremsstrahlung γ-rays in heavy ion reactions
Probing high-momentum component in nucleon momentum distribution by neutron-proton bremsstrahlung γ-rays in heavy ion reactions Open
The high momentum tail (HMT) of nucleons, as a signature of the short-range correlations in nuclei, has been investigated by the high-energy bremsstrahlung $γ$ rays produced in $^{86}$Kr + $^{124}$Sn at 25 MeV/u. The energetic photons are …
View article: Studies of nuclear equation of state with the HIRFL-CSR external-target experiment
Studies of nuclear equation of state with the HIRFL-CSR external-target experiment Open
The HIRFL-CSR external-target experiment (CEE) under construction is expected to provide novel opportunities to the studies of the thermodynamic properties, namely the equation of state of nuclear matter (nEOS) with heavy ion collisions at…
View article: A CsI hodoscope on CSHINE for Bremsstrahlung γ-rays in Heavy Ion Reactions
A CsI hodoscope on CSHINE for Bremsstrahlung γ-rays in Heavy Ion Reactions Open
Bremsstrahlung $γ$ production in heavy ion reactions at Fermi energies carries important physical information including the nuclear symmetry energy at supra-saturation densities. In order to detect the high energy Bremsstrahlung $γ$ rays, …
View article: New trapezoid-shaped Frisch-grid ionization chamber for low-energy particle measurements
New trapezoid-shaped Frisch-grid ionization chamber for low-energy particle measurements Open
A new trapezoid-shaped Frisch-grid ionization chamber (TFG-IC) has been built as a part of a $$\varDelta {E}-E$$ telescope system for the detection and identification of charged particles at energies down to a few MeV. To study the e…
View article: Observing the Ping-pong Modality of Isospin Degree of Freedom in Cluster Emission from Heavy Ion Reactions
Observing the Ping-pong Modality of Isospin Degree of Freedom in Cluster Emission from Heavy Ion Reactions Open
Two-body correlations of the isotope-resolved light and heavy clusters are measured in $^{86}$Kr+$^{\rm 208}$Pb reactions at 25 MeV/u. The yield and kinetic variables of the $A=3$ isobars, triton and $^3$He, are analyzed in coincidence wit…
View article: An FPGA-based Trigger System for CSHINE
An FPGA-based Trigger System for CSHINE Open
A trigger system of general function is designed using the commercial module CAEN V2495 for heavy ion nuclear reaction experiment at Fermi energies. The system has been applied and verified on CSHINE (Compact Spectrometer for Heavy IoN Exp…
View article: Reconstruction of fission events in heavy ion reactions with the compact spectrometer for heavy ion experiment
Reconstruction of fission events in heavy ion reactions with the compact spectrometer for heavy ion experiment Open
We report a reconstruction method for fast-fission events in 25 MeV/u 86Kr + 208Pb reactions at the Compact Spectrometer for Heavy Ion Experiment (CSHINE). The fission fragments (FFs) are measured using three large-area parallel-plate aval…
View article: Reconstruction of Fission Events in Heavy Ion Reactions with CSHINE
Reconstruction of Fission Events in Heavy Ion Reactions with CSHINE Open
We report the reconstruction method of the fast fission events in 25 MeV/u $^{86}$Kr +$^{208}$Pb reactions at the Compact Spectrometer for Heavy IoN Experiment (CSHINE). The fission fragments are measured by three large-area parallel plate…
View article: The emission order of hydrogen isotopes via correlation functions in 30 MeV/u Ar+Au reactions
The emission order of hydrogen isotopes via correlation functions in 30 MeV/u Ar+Au reactions Open
View article: The Emission Order of Hydrogen Isotopes via Correlation Functions in 30 MeV/u Ar+Au Reactions
The Emission Order of Hydrogen Isotopes via Correlation Functions in 30 MeV/u Ar+Au Reactions Open
The intensity interferometry is applied as a chronometer of the particle emission of hydrogen isotopes from the intermediate velocity source formed in $^{40}$Ar+$^{197}$Au reactions at 30 MeV/u. The dynamic emission order of $τ_{\rm p}>τ_{…
View article: Exploration of grid scheme for Frisch-grid ionization chamber
Exploration of grid scheme for Frisch-grid ionization chamber Open
View article: CSHINE for studies of HBT correlation in Heavy Ion Reactions
CSHINE for studies of HBT correlation in Heavy Ion Reactions Open
The Compact Spectrometer for Heavy Ion Experiment (CSHINE) is under construction for the study of isospin chronology via the Hanbury Brown$-$Twiss (HBT) particle correlation function and the nuclear equation of state of asymmetrical nuclea…
View article: Measurement of TOF of fast neutrons with 238U target
Measurement of TOF of fast neutrons with 238U target Open
We developed a Dual-PPACs detector for fast neutron measurements that consists of two sets of PPAC: conventional PPAC and fission PPAC. A238U(U3O8) coating is placed in the fission PPAC’s anode, which is used as the neutrons conversion lay…