Meng Qiu-Ying

China Institute of Atomic Energy

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Chengbo Li

University of Catania

Qungang Wen

Anhui University

Y. Fu

China Institute of Atomic Energy

Zhou Shuhua

Beijing Radiation Center

C. Spitaleri

Eni (Italy)

Jing Zhou

Shanghai Institute of Technical Physics

L. Lamia

University of Catania

АТ

А. Туміно

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud

R. G. Pizzone

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud

J. Zhou

Columbia University

Cooperative Institutions

China Institute of Atomic Energy

Beijing Normal University

University of Catania

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud

Beijing Radiation Center

Istituto Nazionale di Fisica Nucleare

Beijing Academy of Science and Technology

Università degli Studi di Enna Kore

Texas A&M University – Commerce

Osservatorio Astrofisico di Catania

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Experimental study to explore theBe8-induced nuclear reaction via the Trojan horse method

Physical review. C (2016)

Qungang Wen Chengbo Li Shu-Hua Zhou B. F. Irgaziev Y. Fu

To explore a possible indirect method for $\rm ^8Be$ induced astrophysical reactions, the $\rm ^9Be=({}^8Be+\it n)$ cluster structure was studied via the Trojan Horse Method. It is the first time to study a super short life nucleus $\rm ^8Be$ via the Trojan Horse Method, and it is the first time to make a valid test for $l=1$ Trojan-horse nucleus. The $\rm ^9Be$ nucleus is assumed to have a ($\rm {}^8Be+\it n$) cluster structure and used as the Trojan-horse nucleus. The $\rm ^8Be$ nucleus acts as a participant, while the neutron is a spectator to the virtual $\rm ^8Be +{\it d}\rightarrow \alpha + {}^6Li$ reaction via a suitable 3-body reaction $\rm ^9Be +{\it d}\rightarrow \alpha + {}^6Li +\it n$. The experimental neutron momentum distribution inside $\rm ^9Be$ was reconstructed. The agreement between experimental and theoretical momentum distribution indicates that there should be a ($\rm {}^8Be+\it n$) cluster structure inside $\rm ^9Be$. Therefor the experimental study of $\rm ^8Be$ induced reactions, for example the experimental measurement of the $\rm ^8Be +\alpha \rightarrow {}^{12}C$ reaction proceeding through the Hoyle state, is possible.

Trojan horse

Momentum (technical analysis)

10.1103/physrevc.93.035803

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Photon discrimination simulation with the PCA method

Chinese Physics C (2010)

Jing Zhou Zhiyi Liu Meng Qiu-Ying Zhou Shu-Hua

The shower shape of n, n, p, p, K+, π+ and photons, generated by JPCIAE code for 5.5 TeV/A 208Pb+208Pb collisions, incident on the ALICE photon spectrometer (PHOS), is analyzed with the principal component analysis (PCA) method. The efficiency dependence of purity for the photon discrimination is simulated for the deposited energy ranges 0.5–2 GeV, 2–10 GeV, 10–50 GeV and 50–100 GeV. The result shows that in the energy range of 0.5 to 100 GeV, the efficiency of the photon identification can reach 90% with purity of 90%.

10.1088/1674-1137/34/10/015

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Publisher's Note: Experimental study to explore theBe8-induced nuclear reaction via the Trojan horse method [Phys. Rev. C93, 035803 (2016)]

Physical review. C (2016)

Qungang Wen Chengbo Li Shu-Hua Zhou B. F. Irgaziev Y. Fu

Received 17 March 2016DOI:https://doi.org/10.1103/PhysRevC.93.039902©2016 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBreakup reactionsNuclear astrophysicsNuclear structure & decaysUnstable nuclei induced nuclear reactionsTechniquesCluster modelsNuclear Physics

10.1103/physrevc.93.039902

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Trojan horse method applied to9Be(p,α)6Liat astrophysical …

Physical Review C (2008)

Qungang Wen Chengbo Li Zhou Shuhua Meng Qiu-Ying Jing Zhou

The low-energy bare-nucleus cross section for ${}^{9}\mathrm{Be}(p,\ensuremath{\alpha}){}^{6}\mathrm{Li}$ has been extracted by means of the Trojan horse method (THM) applied to the ${}^{2}\mathrm{H}({}^{9}\mathrm{Be}$, $\ensuremath{\alpha},{}^{6}\mathrm{Li})n$ reaction at a beam energy of $^{9}\mathrm{Be}$ of 22.35 MeV. For the first time, we assume an intermediate process, ${}^{9}\mathrm{Be}+{}^{2}\mathrm{H}\ensuremath{\rightarrow}{}^{9}\mathrm{Be}+p+n$, and considered this process as one criterion of the quasifree condition. Accordingly, sequential decay processes were eliminated. The derived astrophysical $S(E)$ factor for the two-body process ${}^{9}\mathrm{Be}(p,\ensuremath{\alpha}){}^{6}\mathrm{Li}$ is compared with that obtained from direct experiments. We have found good agreement between the two results, leading to an improved determination of the $S(E)$ with $S(0)=21.0\ifmmode\pm\else\textpm\fi{}0.8$ MeV b. Furthermore, the electron screening potential energy ${U}_{e}=676\ifmmode\pm\else\textpm\fi{}86$ eV has also been extracted in a model-independent way by comparing the direct and THM data. The value is significantly higher than that predicted by current theoretical models, whereas it is lower than $\mathit{Ue}\ensuremath{\simeq}830$ eV, which was extracted from direct measurements with inclusion of the ${E}_{\mathrm{c}.\mathrm{m}.}=\ensuremath{-}23$ keV subthreshold resonance.

10.1103/physrevc.78.035805

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Citations (49)

Experimental spectra analysis in THM with the help of simulation based on the Geant4 framework

Chinese Physics C (2015)

Chengbo Li Qungang Wen Zhou Shuhua Zong-Jun Jiang Y. Fu

The Coulomb barrier and electron screening cause difficulties in directly measuring nuclear reaction cross sections of charged particles at astrophysical energies. The Trojan-horse method (THM) has been introduced to solve the difficulties as a powerful indirect tool. In order to understand experimental spectra better, Geant4 is employed to simulate the method. Validity and reliability of simulation data are examined by comparing the experimental data with simulated results. The Geant4 simulation of THM improves data analysis and is beneficial to the design for future related experiments.

Experimental data

10.1088/1674-1137/39/5/054001

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Measurement of Change of⁷Be Decay Rate in Be and Au

Chinese Physics Letters (2003)

Zhiyi Liu Chengbo Li Siguang Wang Zhou Jing Meng Qiu-Ying

We have measured the possible change of the decay rate of 7Be implanted into hosts of natural beryllium and natural gold. No difference between the 7Be decay rates in the two hosts is observed within the experimental precision of 0.12%. This result implies that change of the decay rate of 7Be implanted in different materials cannot be simply expected from the electron affinity difference consideration lonely and the lattice structure of the host materials should be taken into account.

Lattice (music)

Radioactive decay

10.1088/0256-307x/20/6/314

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Measurement of the astrophysical S factor for the low energy ² H(d,γ) ⁴ He reaction

Chinese Physics C (2009)

Zhou Jing Fu Yuan-Yong Zhou Shuhua Xia Haihong Chengbo Li

The γ-rays and protons from an Ed = 20 keV deuteron beam incident on a D—Ti target were measured. A branching ratio of the 2H(d,γ)4 He reaction versus the 2H(d,p) 3H reaction of Γγ/Γp = (1.06 ± 0.34) × 10−7 has been obtained, and the astrophysical S factor of the 2H(d,γ)4 He reaction at the center of mass energy Ecm ≈ 7 keV of (6.0 ± 2.4) × 10−6 keV·b was deduced.

Branching fraction

Center (category theory)

Helium-3

10.1088/1674-1137/33/5/006

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Citations (5)

Publisher's Note: Beam-energy dependence and updated test of the Trojan-horse nucleus invariance via a measurement of the H2(d,p)H

Physical review. C (2017)

Chengbo Li Qungang Wen А. Туміно Y. Fu J. Zhou

Received 10 March 2017DOI:https://doi.org/10.1103/PhysRevC.95.039905©2017 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBig bang nucleosynthesisBreakup reactionsH & He induced nuclear reactionsNuclear astrophysicsTransfer reactionsNuclear Physics

Trojan horse

Beam energy

10.1103/physrevc.95.039905

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Beam test of a PIN-diode read out PWO calorimeter with electron energies from 5 to 40 GeV at CERN SPS

The European Physical Journal A (2020)

Chengbo Li Xiaomei Li Meng Qiu-Ying Jing Zhou Shuhua Zhou

Preamplifier

Photodiode

Calorimeter (particle physics)

10.1140/epja/s10050-020-00211-y

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Beam Test of the Chinese PIN-diodes at CERN SPS

arXiv (Cornell University) (2019)

Chengbo Li Xiaomei Li Meng Qiu-Ying J. Zhou Shuhua Zhou

The Chinese large-area violet-light-sensitive silicon photodiode PIN is one of the candidates of the lead tungstate crystal detector readout component of the photon spectrometer in the large heavy ion collision experiment. The PIN diode was assembled with the lead tungstate crystal and the low-noise preamplifier into a complete detector unit. The beam test was carried out on the SPS accelerator at CERN. The energy resolution was measured with the electron beam energy ranging from 5 to 40 GeV. The summation correction method was discussed, and an excellent linearity of the nominal beam energy versus the peak position of the detector was obtained, which showed the punch-through effect can be ignored.

Preamplifier

Photodiode

PIN diode

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