School of Physics and Nuclear Energy Engineering

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Presentation transcript:

School of Physics and Nuclear Energy Engineering 100MeV/u 12C+12C scattering Gaolong Zhang School of Physics and Nuclear Energy Engineering Beihang University E405-collaborators

Outline Our motivation Experimental setup School of Physics and Nuclear Energy Engineering Outline Our motivation Experimental setup Data analysis and preliminary results Summary

School of Physics and Nuclear Energy Engineering Our motivation Understanding the interactions between composite nuclei (AA interactions), starting from NN interaction: One of the fundamental subject in nuclear physics One of the key issue to understand various nuclear reactions: * optical potentials: elastic scattering * distorting potentials as a doorway to various reactions (inelastic, transfer, breakup, etc.) Important to survey unknown nuclear structures/reactions of unstable nuclei far from the stability lines. 原子核-原子核相互作用是核物理的一个基础的课题，通过研究原子核与原子核的相互作用对探究各种核反应的机理有重要意义，比如通过光学势的研究可以很好的解释弹性散射通过变形的相互作用势，研究其他一些核反应。核核相互作用对研究远离稳定线的核素的核结构核反应机理也具有十分重要的意义通常，研究核核的相互作用，我们是从核子核子之间的相互作用开始的，比如说这图中，假定一个核子核子相互作用，然后对整个原子核进行积分，便可以得到核核相互作用，双折叠模型

The change of the potential with and without TBF Without 3-body force With 3-body force T. Furumoto, Y. Sakuragi, and Y. Yamamoto, Phys. Rev. C 82 (2010) 044612.

T. Furumoto, Y. Sakuragi, and Y. Yamamoto, Phys. Rev T. Furumoto, Y. Sakuragi, and Y. Yamamoto, Phys. Rev. C 82 (2010) 044612.

12C+12C elastic scattering at E/A=100-400MeV School of Physics and Nuclear Energy Engineering 12C+12C elastic scattering at E/A=100-400MeV real potential change to: repulsive at E/A=300-400MeV The energy of the minimum oscillation changes by three-body interactions. T. Furumoto, Y. Sakuragi, and Y. Yamamoto, Phys. Rev. C 82 (2010) 044612. TBF no yes

Experiment Brief Introduction RCNP Beam line: WS course Beam: 100A MeV 12C Beam intensity: 0.1-1.0 pnA on target Beam energy resolution: 500keV Target: 1.181mg/cm2 natural C 11.40mg/cm2 CH2 Detector: VDC1 and VDC2 PS1, PS2 and PS3 Measured angles: 1-7.5 degrees, Angular resolution: better than 0.1 degree

Magnetic spectrometer “GRAND RAIDEN” 3 m Focal Plane Detector (VDCs+PSs) Focal plane detectors VDC1 VDC2 PS1 PS2 PS3 Two Vertical-type Drift Chambers(VDCs) + Three Plastic scintillators(PSs) (thickness: 3mm 10mm and 10mm) VDC1 and VDC2: particle trajectory PS1, PS2 and PS3: identify particles

GR setting angles: 2.0, 2.5, 3.5, 5.0 and 6.5 School of Physics and Nuclear Energy Engineering GR setting angles: 2.0, 2.5, 3.5, 5.0 and 6.5

20mrad (H)  6mrad (V)

Data analysis and preliminary results Brief Introduction Data analysis and preliminary results

Use kinematics to calculate the Q-value; Separate the Q spectrum into School of Physics and Nuclear Energy Engineering Use kinematics to calculate the Q-value; Separate the Q spectrum into every 0.1 deg. ; Through fitting get the counts of every states .

Cross section calculation Beam intensity Target thickness Solid angle Efficiencies

Use CH2 target to check our data 12C+p elastic scattering School of Physics and Nuclear Energy Engineering Use CH2 target to check our data 12C+p elastic scattering K. STRAUCH, F. TITUS Phys. Rev. 103(1956) 200

Physics: (1) Three-body-force (2) Couple channel effect (3) Hoyle state (4) ……

Collaborators: (1)Beihang University Tanihata Isao, Le Xiaoyun, Terashima Satoru, Wang Taofeng, Sun Baohua, Qu Weiwei and Guo Chenlei (2) RCNP, Osaka University Tanihata Isao, Sakaguchi H, Ong Hooi Jin, Matsuda, Tamii A, Miki K, Yassid Ayyad andAzusa Inoue (3) IMP, CAS Chen Zhiqiang, Wada R

School of Physics and Nuclear Energy Engineering Summary Study an effect of tensor forces and three-body interactions in heavy-ion reactions by 12C + 12C elastic scattering at beam energies from 100A to 400A MeV. The experiment of 100A MeV12C+12C elastic scattering has been done at RCNP. Elastic and inelastic parts can be clearly separated. The preliminary results have been obtained. The experimental data will be continued to analyze and give the final results.

Thank you for your attention!

M. Takashina et al., Phys. Rev. C 81, 047605 (2010).

Figure is the calculated by Furumoto et al. (YKIS2011)