22 MeV polarized proton scattering from ⁴⁰Ca and effective NN interactions

22 MeV polarized proton scattering from 40 Ca and effective NN interactions 1 corresp first-author E-mail: anshu@scu.edu.cn E-mail: anshu@scu.edu.cn anshu@scu.edu.cn 2 2 2 2 1 2 2 2 1Key Laboratory for Radiation Physics and Technology of Education Ministry of China, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064 1Key Laboratory for Radiation Physics and Technology of Education Ministry of China, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064 2China Institute of Atomic Energy, P.O.Box 275(10), Beijing 102413 2China Institute of Atomic Energy, P.O.Box 275(10), Beijing 102413 Analyzing powers and differential cross sections have been measured for elastic scattering of 22 MeV polarized protons from 40 Ca, 16 O and 12 C, and differential cross sections for inelastic scattering of 22 MeV protons from 3 - (3.736 MeV) and 5 - (4.491 MeV) states of 40 Ca have also been measured. The experimental data for polarized proton elastic scattering have been analyzed with a phenomenological optical potential parameters, the experimental data and theoretical values are in good agreement. In the theoretical frame of microscopic single scattering model, transition densities extracted from electron inelastic scattering and M3Y and Halderson's effective interactions have been utilized to analyze the experimental data of 22 MeV proton inelastic scattering from 40 Ca. Overall, it seems that Halderson's effective interaction can better describe the experimental data than M3Y although the degree of agreement between experimental and theoretical values needs to be improved. Polarized proton scattering Effective nucleon-nucleon interaction References Stephenson E J , Liu J , Bacher A D et al . Phys Rev Lett , 1997 , 78 : 1636 Phys Rev Lett Häusser O , Larson B , Alford W P et al . Phys Lett , 1995 , B343 : 36 Phys Lett Wells S P , Wissink S W . Phys Rev , 2000 , C61 : 014601 Phys Rev Love W G , Franey M A . Phys Rev , 1981 , C24 : 1073 Phys Rev Nakayama K and Love W G . Phys Rev , 1988 , C38 : 51 Phys Rev von Geramb H V , Interaction between medium energy nucleons in nuclei , in AIP Conference Proceding , Meyer H O ed, Vol.97 , New York : AIP Press , 1982 : 44 Interaction between medium energy nucleons in nuclei Bertsch G , Borysowicz J , Mcmanus H and Love W , Nucl Phys , 1977 , A284 : 399 Nucl Phys Anantaraman N , Toki H , Bertsch G . Nucl Phys , 1983 , A398 : 269 Nucl Phys Hosaka A , Kubo K I , Toki H . Nucl Phys , 1985 , A444 : 76 Nucl Phys Yamaguchi N , Nagata S , Matsuda T . Prog Theor Phys(Japan) , 1983 , 70 : 459 Prog Theor Phys(Japan) Yamaguchi N , Nagata S and Matsuda T , Prog Theor Phys(Japan) , 1986 , 76 : 1289 Prog Theor Phys(Japan) Kelly J J , Phys Rev , 1989 , C39 : 2120 Phys Rev An Z , Chen Q , Ding Dazhao et al . Chin Phys Lett , 1994 , 11 : 401 Chin Phys Lett Plavko A , Onegin M , Kudriashov V et al . Polarization Phenomena in Nuclear Physics 8th Int Symposium (Bloomington, 1994) , in AIP Conf Proc No.339 . Stephenson E J , Vigdor S E ed. New York : AIP Press , 1995 : 581 Polarization Phenomena in Nuclear Physics 8th Int Symposium (Bloomington, 1994) Halderson D , J Phys , 1994 , G20 : 1461 J Phys Tagishi Y , Tomizawa A , Tomizawa M et al . Nucl Instr Meth , 1992 , A322 : 304 Nucl Instr Meth Kelly J J , computer code ALLFIT , unpublished . computer code ALLFIT Fabrici E , Micheletti S , Pignanelli M et al . Phys Rev , 1980 , C21 : 830, 844 Phys Rev Petrovich F , Yoon S K , Threapleton M J et al . Nucl Phys , 1993 , A563 : 387 Nucl Phys Kelly J J , computer code LEA , unpublished computer code LEA Kelly J J , private communication private communication Riley L A , Jewell J K , Cottle P D et al . Phys Rev Lett , 1999 , 82 : 4196 Phys Rev Lett O571.418 Supported by the National Natural Science Foundation of China under Grant (19575032) 2000-05-20 2000-08-01 2021-02-05 2000 Nuclear Science and Techniques 3 11