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2006年03月20日

【期刊论文】First observation of neutron-proton halo structure for the 3.563 MeV 0+ state in 6Li via 1H (6He, 6Li) n reaction

柳卫平， Zhihong Li， Weiping Liu， Xixiang Bai， Youbao Wang， Gang Lian， Zhichang Li， Sheng Zeng

Physics Letters B 527(2002)50-54，-0001，（）：

-1年11月30日

The angular distributions of the charge exchange reaction 1H(6He, 6Li)n were measured in reverse kinematics with a secondary 6He beam at the energy of 4.17AMeV. The data were analyzed in the context of a microscopic calculation. It is shown that both the ground state of 6He and the second excited state of 6Li (3.563 MeV, 0+) have halo structure.

1H (， 6He,， 6Li)， n reaction in inverse kinematics， Angular distribution， Microscopic optical potential， Nucleon density distribution， Proton-neutron halo structure

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2006年03月20日

【期刊论文】Precise Determination of 40Ti Mass by Measuring the 40Sc Isospin Analogue State

柳卫平， LIU Wei-Ping ， M. HellstrSm ， R. Collatz ， J. Benlliure ， L. Chulkov ， D. Cortina Gil ， F. Farget ， H. Grawe ， Z. Hu ， N. Iwasa ， M. Pfiitzner ，， A. Piechaczek ， R. Raabe ， I. Reusen ， E. Roeckl ， G. Vancraeynest ， A. WShr

CHIN.PHYS.LETT 18, 11(2001):1449-1451，-0001，（）：

-1年11月30日

摘要

The mass of 40Ti has been determined by using the isobaric multiplet mass equation method. The experimental data of the 40Ti β-decay were used to determine the level of the isospin analogue stateof 40Sc. The ground-state mass excess and the QEC value for 40Ti were determined to be 9060±12 ke V and 11 466±13 ke V, respectively.

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2006年03月20日

【期刊论文】Beta-decay of 56Cu

柳卫平， M. Ramdhane a， P. Baumann a， A. Knipper a， G. Walter a， Z. Janas b， A. Płochocki b， J. Äystöc， P. Dendoovenc， A. Jokinen c， M. Oinonen c， H. Pentila c， W. Liu d， M. Gorska b， d， H. Grawe d， Z. Hu d， R. Kirchner d， O. Klepper d， E. Roeckl d， Y. Fujita e， B.A. Brown

Physics Letters B 432(1998)22-28，-0001，（）：

-1年11月30日

摘要

By measuring positrons and b-delayed g-rays emitted from mass-separated sources, the decay of 56Cu 4q,T sy1,Ts1. z to states in the doubly-magic nucleus 56Ni was studied for the first time. The half-life of 56Cu was measured to be 78 15. ms, and four b-delayed g-rays were assigned to its decay. The resulting experimental data on Fermi and Gamow-Teller strength are compared with shell-model predictions. q1998 Elsevier Science B.V. All rights reserved.

Radioactivity 56Cu wfrom natSi 32 S,， xpyn.， x， Measured Ey,， Iy,， T， Deduced log ft,， Jp， On-line mass separation， Ge-detectors， g g 1r2 Plastic-scintillator detector， Nuclear structure 56 Ni,， 56 Cu， Calculated levels， Gamow-Teller strength， Shell model

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2006年03月20日

【期刊论文】Determination of 11C (p, γ) 12N astrophysical S-factor via measurement of 11C (d, n) 12N reaction

柳卫平， Weiping Liu*， Zhihong Li， Xixiang Bai， Bing Guo， Sheng Zeng， Yongshou Chen， Shengquan Yan， Baoxiang Wang， Gang Lian， Yun Lu， Kaisu Wu， Nengchuan Shu

Nuclear Physics A 728(2003)275-284，-0001，（）：

-1年11月30日

摘要

Angular distribution of the 11C (d, n) 12N reaction at Ecm=9.8 MeV was measured in inverse kinematics with the secondary 11C beam. The experimental data were analyzed with DWBA calculations and thereby the asymptotic normalization coefficient, (C12Npeff)2=(C12Np1/2)2+(C12Np3/2)2, was extracted to be 2.86±0.91fm−1 for the virtual decay 12N→11C+p. The zero energy astrophysical S-factor for the direct capture 11C (p,γ) 12N reaction was then derived to be 0.157±0.050keVb. We have also estimated the contributions from resonant captures into the first-and second excited states of 12N and the interference between direct capture into the ground state and resonant capture into the second excited state. The temperature dependences of the direct capture, resonant capture and total reaction rates for 11C (p,γ) 12N were derived. The present work shows that the direct capture dominates the 11C (p,γ) 12N in the wide energy range of astrophysical interest except the ranges corresponding to two resonances.

NUCLEAR REACTIONS 2H (， 11C,， 12N)， ,， Ecm=， 9.， 8 MeV， measured σ(， θ)，， deduced asymptotic normalization coefficient.， 11C(， p,， γ)， ,， E=， low， deduced astrophysical S-factor,， reaction mechanism features.， DWBA analysis.，

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2006年03月20日

【期刊论文】Nuclear Astrophysics Experiments at CIAE

柳卫平， Weiping Liu*， Zhihong Li， Xixiang Bai， Gang Lian， Bing Guo， Sheng Zeng， Shengquan Yan， Baoxiang Wang， Nengchuan Shu， Kaisu Wu， and Yongshou Chen

Nuclear Physics A 758(2005)110c-113c，-0001，（）：

-1年11月30日

摘要

This paper describes nuclear astrophysical studies using the unstable ion beam facility GIRAFFE. We measured the angular distributions for some low energy reactions, such as 7Be (d, n) 8B, 11C (d, n) 12N, 8Li (d, n) 9Be and 8Li (d, p) 9Li in inverse kinematics, and indirectly derived the astrophysical S-factors or reaction rates of 7Be (p, γ) 8B,11C (p, γ) 12N, 8Li (n, γ) 9Li at astrophysically relevant energies.

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