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Astrophysical Rates for the 6He(p,γ)7Li Reaction

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Chinese Physics Letters 2011年第5期28卷 72-75页

作者： LI Er-Tao LI Zhi-Hong SU Jun GUO Bing LI Yun-Ju YAN Sheng-Quan bai xi-xiang WANG You-Bao WANG Bao-xiang LIAN Gang ZENG Sheng FANG xiao ZHAO Wei-Juan LIU Wei-Ping China Institute of Atomic Energy Beijing 102413 Institute of Physical Engineering Zhengzhou UniversityZhengzhou 450052

Angular distribution of the^(6)He(d,n)^(7)Li reaction at E_(c.m.)=9.1 MeV is measured in inverse kinematics for the first *** proton spectroscopic factors for the ground and first excited states of^(7)Li are derived by using the distorted wave Born approximation *** astrophysical rates of^(6)He(p,γ)^(7)Li reaction are then deduced and fitted with an expression of REACLIB.

关键词： fitted excited distorted

Angular Distribution for ^(7)Be(d,n) ^(8)B Reaction at E_(c.m).=8.3MeV and the Astrophysical S_(l7)(0)Factor for ^(7)Be(p,γ) ^(8)B Reaction

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Chinese Physics Letters 1999年第12期16卷 873-875页

作者： WANG You-bao LIU Wei-ping bai xi-xiang LI Zhi-chang LI An-li ZHOU Shu-hua ZHU xiao-feng LI xiao-mei HE Gao-kui GUO Gang LIAN Gang TANG xiao-dong China Institute of Atomic Energy Beijing 1024131Cyclotron InstituteTexas A&M UniversityUSA

The differential cross section for 7Be(d,n)8B reaction at E_(c.m).=8.3 MeV has been measured by using a 7Be radioactive *** reaction cross section was determined to be 28±*** astrophysical Sl7(0)factor for the 7Be(p,γ)8B reaction was derived to be 24±5 eV b through the asymptotic normalization constant of)8B extracted from the experimental *** result is found to be consistent with a previous value obtained from the same reaction at Ec.m.=5.8 MeV,implying the energy independence of this indirect method within the uncertainty.

关键词： beam independence asymptotic

First Measurement of the 2H(6He,7Li)n Angular Distribution and the Proton Spectroscopic Factor of 7Li

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First Measurement of the 2H(6He,7Li)n Angular Distribution a...

作者： LI Zhi-hong LI Er-tao GUO Bing bai xi-xiang LI Yun-ju YAN Sheng-quan WANG You-bao LIAN Gang SU Jun WANG Bao-xiang ZENG Shen FANG xiao LIU Wei-ping

The(Li,He) reaction is a valuable spectroscopic tool in the study of nuclear reactions because the shape of its angular distribution can be well reproduced by distorted wave Born approximation(DWBA) *** the calculations of(Li,He) reaction,the spectroscopic factor of Li ground state was taken to be *** et *** the spectroscopic factor of Li ground state to be S(p)=0.62 from the Li(n,d) He reaction with 56.3 MeV *** as et *** the proton spectroscopic factor of Li to be 0.42±0.04 via the measurement of the Li(e,ep) *** value is 32%smaller than that from

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6He+p Elastic Resonance Scattering via a Thick-Target Method

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6He+p Elastic Resonance Scattering via a Thick-Target Method

作者： WANG Bao-xiang WANG You-bao JIN Sun-jun LIU xin bai xi-xiang LI Zhi-hong GUO Bing LI Er-Tao LI Yun-ju SU Jun LIAN Gang ZENG Sheng HUANG Wu-zhen LIU Wei-ping

Studies of neutron-rich nuclei can provide fundamental insights into nuclear structure and interactions that are not manifest in the valley of *** exotic nuclei such as the heavy helium isotopes are the perfect proving ground for our understanding of the behavior of nuclear matter at extreme neutron to proton *** years,some theories pointed out that neutron-rich nucleus He has several excited states,the standard shell model and quantum Monte-Carlo calculations even predicted a low-lying resonance state(J=1/2) in *** experimental results of *** et *** *** et *** that the 1/2 state exists,but its position and width are obviously ***,most of experimental and theoretical studies think that the 1/2 state does not exist. If the state exist,this is particularly important since the confirmation of this result would provide

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Angular Distribution of 13C(9Be,8Li)14N Reaction

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Angular Distribution of 13C(9Be,8Li)14N Reaction

作者： LI Er-tao LI Zhi-hong LI Yun-ju GUO Bing SU Jun WANG You-bao WANG Bao-xiang ZENG Sheng JIN Sun-jun LIU xin HUANG Wu-zhen LIAN Gang bai xi-xiang LIU Wei-ping

The inhomogeneous models(IMs) allow a higher production of A>8 nuclides because the instability gap can be passed by He(t,γ) Li(n,γ) Li(α,n) B reaction chain,in which Li (α,n) B reaction plays a crucial *** the synthesis of the heavier nuclides via Li scales with the Li abundance during primordial nucleosynthesis,all the reactions which create or destroy Li are important in the *** Li(p,γ) Be reaction is important for it not only destroys Li but also leads to the production of Be, which serves as a precursor to heavier ***,Li(p,γ) Be is involved in the extend reaction

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17F+p Elastic Resonance Scattering via a Thick-Target Method

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17F+p Elastic Resonance Scattering via a Thick-Target Method

作者： JIN Sun-jun WANG You-bao WANG Bao-xiang bai xi-xiang FANG xiao GUO Bing LI Er-tao LI Yun-ju LI Zhi-hong LIAN Gang SU Jun YAN Sheng-quan ZENG Sheng LIU Wei-ping

O(α,p) F and F(p,γ) Ne are the two critical reactions,which provide the breakout from the HCNO cycle to the *** the temperature and the density reach to the condition of T>0.4,ρ>10 g/cm,the a capture reaction at the waiting-point nucleus O will overtake itsβ*** breakout reactions such as Ne(α,p) Na will eventually lead to the *** X-ray burst model assumes that elements up to Ni or even further can be synthesized within a time scale of 10-100 s following the O(α,p) F ***,the properties of the relevant states in Ne are crucial

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Angular Distribution of 12C(9Be,9Be)12C Reaction

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Angular Distribution of 12C(9Be,9Be)12C Reaction

作者： LI Er-tao LI Zhi-hong LI Yun-ju GUO Bing SU Jun WANG You-bao WANG Bao-xiang ZENG Sheng JIN Sun-jun LIU xin HUANG Wu-zhen LIAN Gang bai xi-xiang LIU Wei-ping

At the HI-13 tandem accelerator Q3D spectrometer of China Institute of Atomic Energy Beijing,a 78μg/cm thick pure carbon target was used to measure the angular distribution of the C(Be,Be)C *** used a 45 mm×45 mm position sensitive silicon detector(PSSD) to collect the Be ions which produced by C(Be,Be)C reaction at the focus of the ***,we get the angular distribution of the C(Be,Be)C reaction at E=22.8 MeV as is shown in Fig.1.

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Experimental Study of the Prompt Neutron Spectra of ^(238)U Fission Induced by Fast Neutrons

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Chinese journal of nuclear physics 1994年第3期16卷 255-262页

作者： Li An-li bai xi-xiang Wang xiao-zhong Wang Yu-feng Meng Jiang-chen Liu Wei-ping Yuan Yuan Chih Ta-hai Huang Sheng-nian (China Institute of Atomic Energy,P.O.Box 275(46),Beijing 102413) 中国原子能科学院北京

The prompt neutron spectra of 238U fission induced by 10.17 and 12.12 MeVneutrons have been measured using a multi-segment fission chamber and two ST-451liquid scintillator neutron detectors in conjunction with a double-TOF *** ofcoincidence between the fission fragments and neutrons enables the fission neutrons tobe distinguished from other secondary *** measured spectra can be roughly des-cribed by Maxwellian *** Maxwellian temperatures obtained by fittingare 1.40±0.04 MeV and 1.47±0.04 MeV for 10.17 MeV and 12.12 MeV incidentneutron energies,*** are compared with theoretical calculations by codeFINESSE and the evaluation by ENDF/B-Ⅵ.

关键词： Fission neutron spectrum TOF technique 238U

Neutron Spectroscopic Factors of 7Li

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Neutron Spectroscopic Factors of 7Li

作者： SU Jun LI Zhi-hong GUO Bing bai xi-xiang WANG You-bao LIAN Gang ZENG Sheng WANG Bao-xiang YAN Sheng-quan LI Yun-ju LI Er-tao LI Zhi-chang LIU Jian-cheng LIU Wei-ping

We have measured the angular distributions of the Li(Li,Li)Li elastic scattering and Li(Li,Li)Li, Li(Li,Li)Li transfer reactions at E=23.7 *** neutron spectroscopic factors for the ground and first exited states in Li were determined by comparing the experimental results with the distorted-wave Born approximation(DWBA) calculations. The experiment was carried out at the Beijing HI-13 tandem accelerator.A 44 MeV Li beam in intensity of about 100 pnA impinged on the natural LiF *** beam was collected by a Faraday cup

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