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NSR database version of May 24, 2024.

Search: Author = P.Ren

Found 23 matches.

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2023QU03      Chin.Phys.C 47, 054002 (2023)

G.Qu, Y.Huang, H.Zheng, X.Liu, R.Wada, W.Lin, M.Huang, J.Han, P.Ren, Z.Yang, X.Zhang, Q.Leng

Determining the nuclear temperature dependence on source neutron-proton asymmetry in heavy-ion reactions at intermediate energy

NUCLEAR REACTIONS 112Sn, 70Zn(64Zn, X), 112,124Sn, 58,64Ni, 197Au, 232Th(64Ni, X), E=40 MeV/nucleon; analyzed available data; deduced the dependence of nuclear temperature on emitting source neutron-proton N/Z asymmetry with light charged particles (LCPs) and intermediate mass fragments (IMFs) generated from intermediate-velocity sources in thirteen reaction systems with different N/Z asymmetries.

doi: 10.1088/1674-1137/acbd91
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2022ZH15      Phys.Rev. C 105, 034611 (2022)

X.Zhang, X.Liu, Y.Huang, W.Lin, H.Zheng, R.Wada, A.Bonasera, Z.Chen, L.Chen, J.Han, R.Han, M.Huang, Q.Hu, Q.Leng, C.W.Ma, G.Qu, P.Ren, G.Tian, Z.Xu, Z.Yang, L.Zhang

Determining impact parameters of heavy-ion collisions at low-intermediate incident energies using deep learning with convolutional neural networks

NUCLEAR REACTIONS 124Sn(124Sn, X), E=50, 70, 100 MeV/nucleon; calculated absolute transverse and longitudinal momentum per nucleon of all possible charged particles in exit channel with constrained molecular dynamics (CoMD) model, impact parameter values by convolutional neural network (CNN). Events generated by CoMD are used as input for CNN training. Comparison to impact parameter values obtained using the conventional methods with the impact-parameter sensitive observables.

doi: 10.1103/PhysRevC.105.034611
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2021HU01      Phys.Rev. C 103, 014601 (2021)

Y.Huang, H.Zheng, R.Wada, X.Liu, W.Lin, G.Qu, M.Huang, P.Ren, J.Han, A.Bonasera, K.Hagel, M.R.D.Rodrigues, S.Kowalski, T.Keutgen, M.Barbui, J.B.Natowitz

Nuclear temperature and its dependence on the source neutron-proton asymmetry deduced using the Albergo thermometer

NUCLEAR REACTIONS 112Sn(64Zn, X), E=40 MeV/nucleon; measured reaction products, intermediate mass fragments (IMFs), and yield distributions of secondary cold fragments and the reconstructed primary hot IMFs using ΔE-E telescope with an array of 16 single-crystal CsI(Tl) detectors, and 16 detectors of the Belgian-French neutron detector array DEMON for neutrons at K-500 superconducting cyclotron facility of Texas A and M University; deduced N/Z asymmetry dependence of nuclear temperature for nine Albergo thermometers for isotope ratios of 10Be, 11Be/10B, 11B, 12C, 13N/11Be, 12B, 10Be, 11Be/14N, 15N, 7Li, 7Be/11Be, 11B, 11B, 11C/11Be, 11B, 13C, 13N/11Be, 11B, 15N, 19O/11Be, 11B, 17O, 17F/11Be, 11B, 14C, 14N/12B, 12C. 58,64Ni, 112,124Sn, 197Au, 232Th(64Ni, X), (70Zn, X), E=40 MeV/nucleon; measured primary hot intermediate mass fragments (IMFs) for application of experimental sequential decay correction from the apparent temperatures to the real ones. Comparison with antisymmetrized molecular dynamics (AMD) calculations using GEMINI code.

doi: 10.1103/PhysRevC.103.014601
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2021HU24      Phys.Rev. C 104, 044611 (2021)

Y.Huang, W.Lin, H.Zheng, R.Wada, A.Bonasera, Z.Chen, J.Han, R.Han, M.Huang, K.Hagel, T.Keutgen, X.Liu, Y.G.Ma, C.W.Ma, Z.Majka, G.Qu, L.Qin, P.Ren, G.Tian, J.Wang, Z.Yang, J.B.Natowitz

Experimental investigation of abnormal transverse flow enhancement of α particles in heavy-ion collisions

NUCLEAR REACTIONS 27Al, 48Ti, 58Ni(40Ar, X), E=47 MeV/nucleon from Texas A and M K500 cyclotron facility; measured reaction products, σ(θ) using 4π array NIMROD-ISiS, consisting of a charged particle array and Neutron Ball; deduced normalized charged particle multiplicity distributions, reduced impact parameters, average in-plane fragment transverse momentum for Z=1-5 fragments as function of rapidity, flow as a function of atomic number, two-particle azimuthal correlation functions, relative flow magnitude as function of atomic number, monotonically increasing trend as a function of fragment charge number, evidences for the non-existence of the abnormal α flow behavior in the heavy-ion collisions. Comparison with improved antisymmetrized molecular dynamics model calculations with Fermi motion (AMD-FM).

doi: 10.1103/PhysRevC.104.044611
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2021LI31      J.Phys.(London) G48, 085103 (2021)

W.Lin, P.Ren, X.Liu, H.Zheng, M.Huang, G.Qu, R.Wada

Investigation of the nuclear liquid-gas phase transition in the static AMD

NUCLEAR STRUCTURE 100Sn, 36Ar; calculated calorimetric curves, light particle multiplicities, nuclear liquid-gas phase transitions in the framework of static antisymmetrized molecular dynamics (static AMD) model under either a constant volume or a constant pressure.

doi: 10.1088/1361-6471/abe563
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2021QU02      Phys.Rev. C 103, 044607 (2021)

G.Qu, Y.Huang, D.Peng, Z.Xu, W.Lin, H.Zheng, G.Tian, R.Han, C.Ma, M.Huang, P.Ren, J.Han, Z.Yang, X.Liu, R.Wada

Abnormal flow of α-particles in heavy-ion collisions at intermediate energies

NUCLEAR REACTIONS 12C(12C, X), E=50 MeV/nucleon; calculated differential σ(θ, E(α)), average in-plane momentum per nucleon as a function of the scaled rapidity, flow as a function of atomic number (Z=1-6), time evolution of flow for Z=1-6 fragments. 40Ca(40Ca, X), E=35 MeV/nucleon; Ni(Ar, X), (Ni, X), E=32-95 MeV/nucleon; calculated flow for proton, α, Z=3-5 and Z≥6 fragments as function of incident energy. Improved antisymmetrized molecular dynamics model with Fermi motion (AMD-FM) and the statistical decay code Gemini in the nucleon-nucleon collision process. Comparison with experimental data from GANIL and Texas A and M facilities. Investigated experimentally observed abnormal α transverse flow behavior in heavy-ion collisions at intermediate energies.

doi: 10.1103/PhysRevC.103.044607
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2020HU09      Phys.Rev. C 101, 064603 (2020)

Y.Huang, W.Lin, H.Zheng, R.Wada, X.Liu, G.Qu, M.Huang, P.Ren, J.Han, M.R.D.Rodrigues, S.Kowalski, T.Keutgen, K.Hagel, M.Barbui, A.Bonasera, J.B.Natowitz

Probing the neutron-proton asymmetry dependence of the nuclear source temperature with light charged particles

NUCLEAR REACTIONS 112Sn(64Zn, X), (64Ni, X), E=40 MeV/nucleon; 124Sn, 58,64Ni, 197Au, 232Th(70Zn, X), (64Ni, X), E=40 MeV/nucleon; measured differential σ(θ) for light charged particles: neutrons, protons, deuterons, tritons, 3He and α particles in coincidence with intermediate mass fragments (IMFs) at different lab angle, and apparent temperatures using silicon E-ΔE detector telescope for the detection of IMFs, CsI detectors for light charged particle, and DEMON array for neutrons at the K-500 superconducting cyclotron of Texas A and M University; deduced dependence of nuclear temperature on source neutron-to-proton asymmetry. Comparison with statistical multifragmentation model (SMM), and with antisymmetrized molecular dynamics (AMD-Gemini) calculations.

doi: 10.1103/PhysRevC.101.064603
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2019LI25      Phys.Rev. C 99, 054616 (2019)

W.Lin, P.Ren, H.Zheng, X.Liu, M.Huang, K.Yang, G.Qu, R.Wada

Solidarity of signal of measures for the liquid-gas phase transition in the statistical multifragmentation model

NUCLEAR STRUCTURE 40Ar, 100Rh, 200Th; 100Zr, 100Rh, 100Sn; calculated caloric curve, multiplicity derivative, moment parameters, fluctuation of maximum fragment charge number, the Fisher exponent, Zipf's law parameter, and charge distributions of fragmenting sources at energy of 1-15 MeV/nucleon and temperature T=3-10 MeV. 36Ar, 100Sn; calculated caloric curves at an energy of 2-25 MeV/nucleon. Nuclear liquid-gas phase transition and the mechanism of phase transition treated in the framework of the statistical multifragmentation model (SMM).

doi: 10.1103/PhysRevC.99.054616
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2019LI57      Phys.Rev. C 100, 064601 (2019)

X.Liu, H.Zheng, R.Wada, W.Lin, M.Huang, P.Ren, G.Qu, J.Han, M.R.D.Rodrigues, S.Kowalski, T.Keutgen, K.Hagel, M.Barbui, A.Bonasera, J.B.Natowitz

Neutron-proton asymmetry dependence of nuclear temperature with intermediate mass fragments

NUCLEAR REACTIONS 70Zn, 112Sn(64Zn, X), 58,64Ni, 112,124Sn, 197Au, 232Th(64Ni, X), E=40 MeV/nucleon; measured reaction products, intermediate mass fragments (IMFs), light charged particles (LCPs), (LCP)(IMF)-coin, angular distributions using a Si detector telescope for IMFs and an array of 16 CsI(Tl) detectors for LCPs at the Texas A and M cyclotron facility; deduced multiplicity distributions for 14,16,18,20O, N/Z asymmetry dependence of the nuclear temperature. Comparison with previous experimental results, and with antisymmetrized molecular dynamics (AMD) and statistical multifragmentation model (SMM) simulations using the GEMINI code for AMD.

doi: 10.1103/PhysRevC.100.064601
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2019WA06      Phys.Rev. C 99, 024616 (2019)

R.Wada, W.Lin, P.Ren, H.Zheng, X.Liu, M.Huang, K.Yang, K.Hagel

Experimental liquid-gas phase transition signals and reaction dynamics

NUCLEAR REACTIONS 27Al, 48Ti, 58Ni(40Ar, X), E=47 MeV/nucleon; analyzed experimental data for charged particles (p, d, t, 3He, α) using the 4π detector NIMROD at TAMU K500 super-conducting cyclotron, quasi-projectile particle kinetic energy spectra, quasi-projectile charge and mass distribution, charged particle multiplicity, and excitation energy distributions; deduced phase transition signals by the statistical multifragmentation model (SMM), quadrupole momentum fluctuation temperatures, specific heat capacity, multiplicity derivative, and normalized variance of maximum charge in quasi-projectiles.

doi: 10.1103/PhysRevC.99.024616
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2018LI21      Phys.Rev. C 97, 044603 (2018)

W.Lin, H.Zheng, P.Ren, X.Liu, M.Huang, R.Wada, Z.Chen, J.Wang, G.Q.Xiao, G.Qu

Statistical analysis of experimental multifragmentation events in 64Zn+112Sn at 40 MeV/nucleon

NUCLEAR REACTIONS 112Sn(64Zn, X), E=40 MeV/nucleon; calculated average and quasi temperatures with and without the symmetry entropy, and symmetry energy coefficients as function of fragment mass, Coulomb energy coefficients, mass and isotopic distributions, and yield ratio of isobars for intermediate mass fragments (IMF) by isobaric yield ratio (IYR) method. Statistical multifragmentation model (SMM) for observed multifragmentation events intermediate heavy-ion reactions. Comparison with antisymmetrized molecular dynamics model (AMD) calculations, and with experimental data.

doi: 10.1103/PhysRevC.97.044603
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2018LI26      Phys.Rev. C 97, 054615 (2018)

W.Lin, P.Ren, H.Zheng, X.Liu, M.Huang, R.Wada, G.Qu

Sensitivity study of experimental measures for the nuclear liquid-gas phase transition in the statistical multifragmentation model

doi: 10.1103/PhysRevC.97.054615
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2017TI03      Phys.Rev. C 95, 044613 (2017)

G.Tian, R.Wada, Z.Chen, R.Han, W.Lin, X.Liu, P.Ren, F.Shi, F.Luo, Q.Sun, L.Song, G.Q.Xiao

Nuclear stopping and light charged particle emission in 12C + 12C at 95 MeV/nucleon

NUCLEAR REACTIONS 12C(12C, X)1H/2H/3H/3He/4He/6Li/7Li/7Be/9Be/10Be/8B/10B/11B/10C/11C/12C, E=95 MeV/nucleon; analyzed angular distributions and energy spectra of all the ejectiles from 12C+12C reaction using antisymmetrized molecular dynamics (AMD), a modified version of AMD (AMD-FM), and constrained molecular dynamics (CoMD). Detailed comparison with experimental data.

doi: 10.1103/PhysRevC.95.044613
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2016LI52      Phys.Rev. C 94, 064609 (2016)

W.Lin, X.Liu, R.Wada, M.Huang, P.Ren, G.Tian, F.Luo, Q.Sun, Z.Chen, G.Q.Xiao, R.Han, F.Shi, J.Liu, B.Gou

High-energy proton emission and Fermi motion in intermediate-energy heavy-ion collisions

NUCLEAR REACTIONS 51V(40Ar, X), E=44 MeV/nucleon; 181Ta(36Ar, X), E=94 MeV/nucleon; calculated high energy proton spectra, differential σ(θ, Ep), angular distribution of protons in intermediate-energy heavy-ion collisions. Antisymmetrized molecular dynamics model (AMD-FM) with explicit treatment of Fermi motion. Comparison with experimental data.

doi: 10.1103/PhysRevC.94.064609
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2016TR10      Phys.Rev. C 94, 064604 (2016)

D.T.Tran, H.J.Ong, T.T.Nguyen, I.Tanihata, N.Aoi, Y.Ayyad, P.Y.Chan, M.Fukuda, T.Hashimoto, T.H.Hoang, E.Ideguchi, A.Inoue, T.Kawabata, L.H.Khiem, W.P.Lin, K.Matsuta, M.Mihara, S.Momota, D.Nagae, N.D.Nguyen, D.Nishimura, A.Ozawa, P.P.Ren, H.Sakaguchi, J.Tanaka, M.Takechi, S.Terashima, R.Wada, T.Yamamoto, for the RCNP-E372 Collaboration

Charge-changing cross-section measurements of 12-16C at around 45 A MeV and development of a Glauber model for incident energies 10 A-2100 A MeV

NUCLEAR REACTIONS 12C(12C, X), (13C, X), (14C, X), (15C, X), (16C, X), E=45 MeV/nucleon, [secondary carbon beams from 9Be(22Ne, X), E=80 MeV/nucleon primary reaction and EN fragment separator at RCNP-Osaka]; measured outgoing particles using multisampling ionization chamber (MUSIC); deduced charge-changing σ(CC) by transmission method, proton rms radii, reaction σ; developed finite-range Glauber model with a global parameter set within the optical-limit approximation; compiled and analyzed reaction σ(E) experimental data for E(12C)=30-100 MeV/nucleon. Comparison of experimental reaction σ for reactions of 12C on 9Be and 27Al targets with present Glauber model analysis.

doi: 10.1103/PhysRevC.94.064604
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2526.

2015HA09      Nucl.Phys. A936, 17 (2015)

R.Han, R.Wada, Z.Chen, Y.Nie, X.Liu, S.Zhang, P.Ren, B.Jia, G.Tian, F.Luo, W.Lin, J.Liu, F.Shi, M.Huang, X.Ruan, J.Ren, Z.Zhou, H.Huang, J.Bao, K.Zhang, B.Hu

Fast neutron scattering on Gallium target at 14.8 MeV

NUCLEAR REACTIONS 69,71Ga(n, n), (n, n'), E≈14.8 MeV; measured En, In(θ); deduced σ, σ(θ). 69,71Ga(n, n), (n, n'), (n, 2n), (n, np), (n, nα), E=0-15 MeV; calculated σ, σ(θ), using TALYS and MCNP. Compared with experimental data and databases.

doi: 10.1016/j.nuclphysa.2015.01.004
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset32742.

2015LI01      Nucl.Phys. A933, 290 (2015)

X.Liu, W.Lin, R.Wada, M.Huang, P.Ren, Z.Chen, J.Wang, G.Q.Xiao, S.Zhang, R.Han, J.Liu, F.Shi, M.R.D.Rodrigues, S.Kowalski, T.Keutgen, K.Hagel, M.Barbui, A.Bonasera, J.B.Natowitz, H.Zheng

Reconstructed primary fragments and symmetry energy, temperature and density of the fragmenting source in 64Zn + 112Sn at 40 MeV/nucleon

NUCLEAR REACTIONS 112Sn(64Zn, x), E=40 MeV/nucleon; calculated, analyzed cold fragments isotopic multiplicity distributions, yields using AMD; deduced temperature, temperature vs fragment mass, symmetry energy.

doi: 10.1016/j.nuclphysa.2014.09.077
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2015LI29      Phys.Rev. C 92, 014623 (2015)

X.Liu, W.Lin, M.Huang, R.Wada, J.Wang, Z.Chen, Q.Wang, P.Ren, Y.Yang, S.Jin, P.Ma, J.Ma, Z.Bai, Q.Hu

Freezeout concept and dynamical transport model in intermediate-energy heavy-ion reactions

NUCLEAR REACTIONS 40Ca(40Ca, X), E=35, 50, 80, 100, 140, 300 MeV/nucleon; calculated density and temperature of intermediate mass fragments (IMFs), ratio of free energy to T0 for N=Z isotopes using a self-consistent method with the modified Fisher (antisymmetrized molecular dynamics) model and Gogny interaction for three different density dependencies of the symmetry energy. Discussed direct connection between the freezeout concept and transport model simulations.

doi: 10.1103/PhysRevC.92.014623
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2014LI33      Phys.Rev. C 90, 014604 (2014)

X.Liu, W.Lin, R.Wada, M.Huang, Z.Chen, G.Q.Xiao, S.Zhang, R.Han, M.H.Zhao, P.Ren, Z.Jin, J.Liu, F.Shi, J.B.Natowitz, A.Bonasera, K.Hagel, H.Zheng, M.Barbui, K.Schmidt

Mass dependence of transverse flow in heavy ion collisions at intermediate energies

NUCLEAR REACTIONS 40Ca(40Ca, X), E=35 MeV/nucleon; measured reaction product spectra, charged particle distributions using NIMROD-ISiS detector system at Texas A-M cyclotron facility; deduced Average in-plane momenta, transverse flow for Z=1-9 particles. Comparison with constrained molecular dynamics (CoMD) simulations.

doi: 10.1103/PhysRevC.90.014604
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2014LI44      Phys.Rev. C 90, 044603 (2014)

W.Lin, X.Liu, M.R.D.Rodrigues, S.Kowalski, R.Wada, M.Huang, S.Zhang, Z.Chen, J.Wang, G.Q.Xiao, R.Han, Z.Jin, J.Liu, P.Ren, F.Shi, T.Keutgen, K.Hagel, M.Barbui, C.Bottosso, A.Bonasera, J.B.Natowitz, T.Materna, L.Qin, P.K.Sahu, H.Zheng

Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in heavy-ion reactions near the Fermi energy

NUCLEAR REACTIONS 112Sn(64Zn, X), E=40 MeV/nucleon; measured fragment spectra, E(n), I(n), double-differential σ(E, θ) for fragments at Texas A and M K-500 superconducting cyclotron facility; deduced isotopic and neutron multiplicity distributions, cold-isotope distributions, absolute multiplicities of reconstructed hot isotopes, symmetry energy coefficient. Monte Carlo simulations. Comparison with antisymmetrized molecular dynamics (AMD) transport model simulations.

doi: 10.1103/PhysRevC.90.044603
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2000WU05      Physica B292, 337 (2000)

S.-Y.Wu, W.-C.Zheng, P.Ren

Investigations of the g Factors and Hyperfine Structure Constants for Tetragonal and Cubic Co2+ Centers in AgCl Crystals

NUCLEAR MOMENTS Co; calculated hfs constants in AgCl crystals; deduced core polarization parameter. Comparison with data.

1986MA73      Chin.J.Nucl.Phys. 8, 312 (1986)

Ma Hongchang, Lu Hanlin, Rong Chaofan, Zhao Wenrong, Ren Peixue, Yang Xiaoyan

Absolute Measurement of 115In Capture Cross Section at 144 and 565 keV

NUCLEAR REACTIONS 115In(n, γ), E=144, 565 keV; measured absolute σ. Activation technique.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset30759.

1984MA71      Chin.J.Nucl.Phys. 6, 219 (1984)

Ma Hongchang, Rong Chaofan, Zheng Jinmei, Liu Jianhua, Zhang Shuping, Ren Peixue

Precision Measurements of the Energy of 14 MeV Neutrons from T(d, n)4He Reaction

NUCLEAR REACTIONS 3H(d, n), E=14 MeV; measured σ(En).

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Note: The following list of authors and aliases matches the search parameter P.Ren: , P.P.REN