LNS/NIG Home Research Highlights Previous Programs Future Projects Members Publications PhD Thesis Previous Members		Nuclear Interaction Group - Previous Research Programs - 1995 ~ 2003 Jefferson Lab BATES Mainz JLab Physics From as far back as the conceptual statges of JLab, the NIG group has contributed and is continuously contributing to it in various ways: We have inriched its physics program by proposing many experiments in Halls A and B; Our Ph.D. students have participated numerous experiments in all three Halls and have completed their theses based on the data they have collected, and many of them have become leading physicists in their post-graduate career; We have also made major contribution to the hardware and software development of Hall A ands C since their early years. Experiments proposed by NIG members and completed by 2005 Experiment Spokesperson Title Beam Days Rating E-89-003 W. Bertozzi K. Fissum A. Saha* L. Weinstein MIT U of Lund JLab ODU Study of the Quasielastic (e,e'p) reaction in 16O at High Recoil Momentum Webpage 20 B- E-89-027 W. Bertozzi W. Boeglin L. Weinstein* MIT FIU ODU Coincidence Reaction Studies with the CLAS 33 B+ E-00-102 W. Bertozzi* K. Fissum* A. Saha* L. Weinstein* MIT U of Lund JLab ODU Testing the limits of the Single Particle Model in 16O(e ep): An update to E89-003 20 A- E-01-015 W. Bertozzi E. Piasetzky J. Watson S. Wood* MIT U of Tel Aviv Kent State U JLab Proposal 97-106 (update) Studying the Internal Small-Distance Structure of Nuclei via the Triple Coincidence (e,e'p+N) Measurement 23 B+ Participated Experiments in Hall A Ph.D. Theses Experiments We have performed the first Hall-A experiment, E89-003. And these first data of Hall A have become the theses of two of our former Ph.D. students, Juncai Gao and Nilanga Liyanage; E89-044 was completed in March 2000, and has become the thesis of Marat Rvachev; E91-011 on pion production was completed in July 2000, and has become the thesis of Zhengwei Chai; A precision measurement of the neutron spin structure, E99-117, was completed in August 2001 and was the thesis topic of Xiaochao Zheng. Here is one of the articles in pubic media reporting on this experiment. Other participated experiments E89-033: Measurement of Recoil Polarization in the 16O Reaction with 4 GeV Electrons E91-026: Measurement of the Electric and Magnetic Structure Functions of the Deuteron at Large Momentum Transfers E93-050: Virtual Compton Scattering HAPPEX expeirments, measurement of the parity violating asymmetries in e-p and e-4He elastic scattering and strangeness content of the nucleon; E93-027: Measurement of the Electric Form Factor of the Proton by Recoil Polarization Participated Experiments in Hall-B E91-023, Measurement of the GDH sum rule on the proton, was completed during CLAS eg1 running period. It was the thesis experiment of Alex Skabelin. E89-027, Searching for Short Range Correlations Using (e,e'NN) Reactions, was completed during CLAS e2 running period. It was the thesis experiment of Bin Zhang. In addition to providing leadership in the pursuit of particular physics and analysis goals, the NIG also performs general service work for the collaboration's efforts. Participated Experiment Hall-C E97-106 - Study of the Small Inter-Nuclear Distance Structure via the (e,e'pN) Reaction MIT - BATES LINEAR ACCELERATOR CENTER The Out-Of-Plane spectrometer (OOPS) system and its physics program The OOPS system allows detection of the final state particles from a scattering process outside the scattering plane, thus allow extraction of the reaction cross section with more degree of freedom than typical in-plane spectrometers. The OOPS is also complementary to typical large solid angle devices such as the BLAST detector at Bates and the CLAS detector in JLab Hall-B because it is designed to measure small effects with relatively high luminosity and consequently low statistical accuracy. There are now several OOPS experiments which have been approved by the Bates PAC with high scientific grades, three(3) of which have NIG member(s) as spokespersons. Practically, we play a central role in all other experiments and it is fair to say that our group is a leading player in the entire OOPS program. The physics of these experiments fall into four categories: Studies of the Quadrupole Component in the N -> Delta Transition: E87-09 - 1H ??; E97-05 - 1H ?; E97-04 - 1H( ?+)n. Studies of the Electromagnetic Currents in Deuterium: E89-14 - 2H n in various kinematics regions E89-10 - 2H n on the quasi-elastic peak. Studies of the Generalized Polarizabilities of the Proton via Virtual Compton Scattering: E97-03 - 1H ?. Studies of Few-Nucleon Systems: E97-06 ?3 p; E97-01 - 4He 3H. Mainz to be added