1. 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

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

3. 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

4. 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)

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

6. 12C+12C elastic scattering at E/A=100-400MeV
School of Physics and Nuclear Energy Engineering
12C+12C elastic scattering at E/A= MeV
real potential change to: repulsive
at E/A= MeV
The energy of the minimum oscillation changes by three-body interactions.
T. Furumoto, Y. Sakuragi, and Y. Yamamoto, Phys. Rev. C 82 (2010)
TBF no
yes

7. Experiment Brief Introduction RCNP Beam line: WS course
Beam: 100A MeV 12C
Beam intensity: 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: degrees,
Angular resolution: better than 0.1 degree

8. 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

9. 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

10. 20mrad (H)
 6mrad (V)

11. Data analysis and preliminary results
Brief Introduction
Data analysis and preliminary results

13. 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 .

14. Cross section calculation
Beam intensity
Target thickness
Solid angle
Efficiencies

18. 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

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

20. 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

21. 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.

22. Thank you for your attention!

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

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