TAMU, Cyclotron Institute Be ， 8 B+ 208 Pb Elastic Scattering at Intermediate Energies Jiansong Wang Institute of Modern Physics Chinese Academy of Sciences

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Collaborators  Institute of Modern Physics, CAS, China Yanyun Yang, Surjit Mukhejee, Lei Jin, Qi Wang, Jianlong Han, Peng Ma, Shilun Jin, Junbing Ma, Shiwei Xu, Zhen Bai, Meirong Huang, Qiang Hu, Jiangbo Chen, Xiaohong Zhou, Yuhu Zhang, Hushan Xu, Guoqing Xiao  The Andrzej Sołtan Institute,Warsaw, Poland N. Keeley, R. Rusek  Beihang University Danyang Pang

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Outline  Motivation  Experimental setup and a brief introduction of RIBLL  Data analysis and results  Discussion

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Motivation （ 1 ）

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Motivation （ 2 ）

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Motivation （ 3 ）

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX RIBLL1 Radioactive Ion Beam Line at Lanzhou RIBLL1

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Users on RIBLL 1. Yanlin Univ 2. Chenjian 3. Zhihong 4. Yugang 5. Jianjun 6. Jiansong 7. ……

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Recently Publications  Phys.Rev.C80(2009)  Phys.Rev.C80(2009)  Phys.Rev.C81(2010)  Eur.Phys.J.A47(2011)67  Phys.Rev.C84(2011)  Phys.Rev.C85 (2012)024621

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Experimental setup 50cm 10cm 12cm 26° 13° 25cm PPAC1 PPAC2 Pb Telescope 1 Telescope 2 Primary beam: 600enA, 56MeV/u 12 C Production target: 9 Be Secondary Beams: 6 Li, 7 Be, 8 B Beam Intensity: ~800pps for 8 B and ~3000pps for 7 Be

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Identification of the Scattering Events The normalization was obtained from a measurement of 8 B elastic scattering which is expected to be purely Rutherford at forward angles. The Left Figure shows a typical particle identification spectrum. The secondary beams 8 B and the containments, 9 C, 7 Be and 6 Li are separated clearly in the figure. And also, the 8 B elastic scattering events were identified with the ΔE-E telescopes.

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Data analysis A C B D O Because the secondary beams are dispersed widely, we have to simulate the Rutherford scattering events and compare with the experimental data to obtain the normalized differential cross section as the following: σ/σ Ruth (θ) = Y(θ) Exp / Y(θ) Sim Y(θ) Exp, Y(θ) Sim are the counts at a given angle θ from the experiment and the simulation, respectively. θ

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Beam profile at target position

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Profile of beam direction

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Differential cross sections 2 ), Red line is from experimental data and Black one is from simulation of Rutherford scattering σ/σ Ruth (θ) = Y(θ) Exp / Y(θ) Ruth Simulated Y(θ) Ruth Y(θ) Exp

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Primary Results The experimental data are fitted by FRESSCO vrvrv avav wrwrw awaw 7 Be B8B  The Coulumb Rainbow Peak is Enhanced for 8 B?

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX The difference between proton and neutron halo

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Fitting using Wood-Saxon Potential

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX CDCC Calculations

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Potentials from the elastic scattering AD

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX The total ， fusion reaction cross sections The total reaction cross section for 8 B is larger than that for 7 Be The fusion reaction cross section for 8 B is smaller than that for 7 Be

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Comparing the grazing angles 1/4 angleexperimentalcalculated 7 Be (+1.7%) 8B8B (+4.0%)

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Reduced reaction cross section

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Conclusions  Our results support that 8 B is a proton halo nucleus  The Coulomb rainbow peak are enhanced for proton halo unlike the neutron halo nuclei which are suppressed or disappeared  More theoretical studies are needed

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX The end Thanks for your attention !

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Backup

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX 9,10,11 C Elastic Scattering Experiment The elastic scattering angular distributions for 9,10,11 C isotopes are measured at RIBLL1 from November 14 to 26 in 2011 Ecm/V cBρBρθ 1/4 counts 9C9C pps 10 C pp s pp s 11 C pp s Radioactive Ion Beam Line at Lanzhou RIBLL1

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX Elastic Scattering Events Identification 9C9C 8B8B 7 Be 6 Li 11 C 10 C Elastic scattering Energy loss at wires of PPACs Beam Spot of 10 C at Target Position

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX  The incident particles are identified by TOF  Two PPACs Tracking the incident particles  Two sets of Silicon Telescope, composed with a strip Si dE detector and square Si E detector,are used to identify the elastic scattering events. Angular Distribution Elastic Events Identification 7 Be, 8 B Elastic Scattering Measurement

Institute of Modern Physics, Chinese Academy of Sciences 7Be,8B Elastic Scatering at Intermediate Energies ， J.S.Wang 6/9/2016NN2012,San antonio, TX