Download or read book High Resolution Spectroscopy of the Lambda B 12 Hypernucleus Produced by the e E K Reaction written by E. V. Hungerford and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first electroproduction experiment of a hypernucleus was undertaken at the Thomas Jefferson National Acceleration Facility. The (e, e'K+) reaction was used on a natC target resulting in the observation of the 12LB hypernucleus. The excitation spectrum is presented and discussed.

Download or read book High Resolution Spectroscopy of the B 12 Lambda Hypernucleus Produced by the e E prime K Reaction written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High energy CW electron beams at new accelerator facilities allow electromagnetic production and precision study of hypernuclear structure, and we report here on the first experiment demonstrating the usefulness of the (e, e'K+) reaction. This experiment is also the first to take advantage of the enhanced virtual photon flux available when electrons are scattered at approximately zero degrees. The observed resolution, ~900 keV, of the 12B(hypernuclear) spectrum is the best yet attained using magnetic spectrometers. The positions of the major excitations are in agreement with theoretical predictions and the previous binding energy measurements.

Download or read book High Resolution Spectroscopy of 12B Hypernuclei by the e E K Reaction written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Jefferson Laboratory experiment E89-009 used the reaction (e, e' K+) to produce 12/[Lambda]B hypernuclei from a carbon target. The scattered electrons were tagged at 0 degrees to take advantage of the increased virtual photon flux at forward angles, and the electroproduced kaons were also detected at small angles, H" degrees, to minimize the momentum transfer. To do this, a splitter magnet was used to bend the scattered electrons into an Enge split-pole spectrometer and the kaons into a short orbit spectrometer. In addition to increasing the production rate, tagging the scattered electrons at 0 degrees minimizes the optical aberrations on the focal plane of the Enge split-pole spectrometer. In this experiment, the spectroscopy of the 12/[Lambda]B hypernuclei was studied and excellent energy resolution was achieved, H"918 keV. The differential cross section of the ground state doublet was also calculated.

Download or read book High Resolution Spectroscopy of 12 atop u039B B Hypernuclei by the e e K Reaction written by and published by . This book was released on 2002 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jefferson Laboratory experiment E89-009 used the reaction (e,e' K+ ) to produce $12top{Λ}$B hypernuclei from a carbon target. The scattered electrons were tagged at 0° to take advantage of the increased virtual photon flux at forward angles, and the electroproduced kaons were also detected at small angles, 3̃°, to minimize the momentum transfer. To do this, a splitter magnet was used to bend the scattered electrons into an Enge split-pole spectrometer and the kaons into a short orbit spectrometer. In addition to increasing the production rate, tagging the scattered electrons at 0 degrees minimizes the optical aberrations on the focal plane of the Enge split-pole spectrometer. In this experiment, the spectroscopy of the $12top{Λ}$B hypernuclei was studied and excellent energy resolution was achieved, ̃918 keV. The differential cross section of the ground state doublet was also calculated.

Download or read book Hypernuclear Spectroscopy of 12lambdaB by the e E K Reactions written by Joerg Reinhold and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first Lambda-hypernuclear spectroscopy study using an electron beam has been carried out at Jefferson Lab. The hypernuclear spectrometer system (HNSS) was used to measure spectra from the 12C (e, e'K+) 12Lambda B reaction with close to 1 MeV resolution, the best energy resolution obtained so far in hypernuclear spectroscopy with magnetic spectrometers. This paper describes the HNSS and preliminary results for the 12Lambda B system. A program of hypernuclear physics experiments is planned for the future with much higher yield and even better energy resolution.

Download or read book High Resolution Spectroscopy of 12B Hypernuclei by the e E K Reaction written by Murad G. Sarsour and published by . This book was released on 2002 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spectroscopic Study of the Lambda Hypernuclei by the e E K Reaction written by Toshinobu Miyoshi and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypernuclear spectroscopy study via the (e, e'K+) reaction has been carried out for the first time, establishing a new technique to study Lambda hypernuclei. The high quality electron beam at Jefferson Lab made it possible to measure Lambda hypernuclear spectra with an energy resolution better than 1 MeV (FWHM). The present experiment was designed to make full use of the virtual photon flux, which peaks at very forward angles, by detecting scattered electrons at 0 degrees. Scattered positive kaons were also detected near 0 degrees, where the cross section of the kaon photo-production is maximized. This unique kinematical configuration was realized with the HyperNuclear Spectrometer System (HNSS), which consisted of the Short-Orbit Spectrometer, the Enge Split-Pole Spectrometer, and the splitter magnet. The Lambda12B mass spectrum was measured in the 12C(e, e'K+)Lambda12B reaction with 0.9 MeV (FWHM) energy resolution. The averaged binding energy of the Lambda12B ground state doublet was obtained to be 11.7 " 0.1 (statistical) " 0.3 (systematic) MeV, which is consistent with emulsion data. The general spectral structure of the 12C(e, e'K+) Lambda12B reaction was found to be similar to that of the 12C(Lambda+, K+)Lambda12C reaction, showing characteristic peaks corresponding to sLambda and pLambda orbits, as well as a few core-excited states. The cross section of the Lambda12B ground state doublet was derived to be 117 " 13 (statistical) " 14 (systematic) nb/sr. The theoretical prediction of the cross section was consistent with the present result, validating DWIA calculation for hypernuclear yields. The present study proved the effectiveness of the (e, e'K+) reaction for future Lambda hypernuclear spectroscopy studies.

Download or read book Spectroscopic Study of Light Lambda Hypernuclei Via the e E K Reaction written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypernuclear production through the (e, e'K+) reaction makes it possible to realize sub-MeV high-resolution spectroscopy of  hypernuclei thanks to the availability of high quality primary beams. It is in contrast to the (K?, L?) and (L+, K+) reactions which use secondary beams of pions and kaons. Even though hypernuclear cross sections are much smaller than those from meson beams, the (e, e?K+) reaction has advantageous features for  hypernuclear production. A goal of the present study is to further explore and establish (e, e?K+) spectroscopy as a tool to investigate  hypernuclei, succeeding the pioneering experiment JLab E89-009, which was successfully carried out previously. A 1.8 GeV electron beam hit targets at the entrance of the splitter magnet in JLab?s Hall C.A positive kaon and a scattered electron were deflected by the splitter magnet to opposite directions and guided to the high resolution kaon spectrometer (HKS) and the scattered electron spectrometer (Enge), respecti.

Download or read book Experimental Study of Hypernuclei Electroproduction by High Precision Spectroscopy written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Jlab experiment E01-011, carried out in 2005 in JLab Hall C, is the second generation of the hypernuclear spectroscopy experiments by the (e, e'K+) reaction. The (e, e'K+) reaction is complimentary to the associated production reactions (K-, [pi]- ), ([pi]+, K+) since, due to a larger momentum transfer to a hyperon, excitations of both spin-non-flip and spin-flip states are possible. The experiment uses high quality and continuous primary electron beam to produce neutron rich hypernuclei on various targets by the electroproduction. The experimental setup consists of splitter magnet, high resolution kaon spectrometer (HKS) and electron spectrometer (Enge) implemented in new configuration, the so called 'Tilt Method'. Production data was taken on multiple targets: CH2, 6Li, 7Li, 9Be, 10B, 12C and 28Si. In present study the analysis of CH2, 12C and 28Si is presented. The elementary processes of p(e, e'K+)[Lambda]/[Sigma] from CH2 data were used for calibration of the spectrometer optics and kinematics. The hypernuclear spectra of 12[Lambda]B was obtained with ground state resolution of 0.47 ± 0.07 MeV (FWHM), the best ever achieved. Feasibility of the electroproduction reaction to study medium to heavy targets has been proven with the first high resolution beyond p-shell hypernuclear spectra from 28[Lambda]Al hypernuclei. The obtained results of the E01-011 experiment confirmed that hypernuclear spectroscopy by the (e, e'K+) reaction is a very useful technique.

Download or read book High Resolution Spectroscopy of 12B Lambda by Electroproduction written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment measuring electroproduction of hypernuclei has been performed in Hall A at Jefferson Lab on a $^{12}$C target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed \lam{12}{B} spectrum shows for the first time identifiable strength in the core-excited region between the ground-state {\it s}-wave $\Lambda$ peak and the 11 MeV {\it p}-wave $\Lambda$ peak.

Download or read book Spectroscopy of Medium heavy Lambda Hypernuclei Via the pi Kappa Reaction written by Dideaki Hotchi and published by . This book was released on 2000 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Update of High Resolution e E K Hypernuclear Spectroscopy at Jefferson Lab s Hall A written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Updated results of the experiment E94-107 hypernuclear spectroscopy in Hall A of the Thomas Jefferson National Accelerator Facility (Jefferson Lab), are presented. The experiment provides high resolution spectra of excitation energy for 12B_\Lambda, 16N_\Lambda, and 9Li_\Lambda hypernuclei obtained by electroproduction of strangeness. A new theoretical calculation for 12B_\Lambda, final results for 16N_\Lambda, and discussion of the preliminary results of 9Li_\Lambda are reported.

Download or read book Introduction to Relativistic Heavy Ion Physics written by Jerzy Bartke and published by World Scientific. This book was released on 2009 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book attempts to cover the fascinating field of physics of relativistic heavy ions, mainly from the experimentalist's point of view. After the introductory chapter on quantum chromodynamics, basic properties of atomic nuclei, sources of relativistic nuclei, and typical detector set-ups are described in three subsequent chapters. Experimental facts on collisions of relativistic heavy ions are systematically presented in 15 consecutive chapters, starting from the simplest features like cross sections, multiplicities, and spectra of secondary particles and going to more involved characteristics like correlations, various relatively rare processes, and newly discovered features: collective flow, high pT suppression and jet quenching. Some entirely new topics are included, such as the difference between neutron and proton radii in nuclei, heavy hypernuclei, and electromagnetic effects on secondary particle spectra.Phenomenological approaches and related simple models are discussed in parallel with the presentation of experimental data. Near the end of the book, recent ideas about the new state of matter created in collisions of ultrarelativistic nuclei are discussed. In the final chapter, some predictions are given for nuclear collisions in the Large Hadron Collider (LHC), now in construction at the site of the European Organization for Nuclear Research (CERN), Geneva. Finally, the appendix gives us basic notions of relativistic kinematics, and lists the main international conferences related to this field. A concise reference book on physics of relativistic heavy ions, it shows the present status of this field.

Download or read book High Energy Physics Index written by and published by . This book was released on 1991 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Problems and Solutions on Atomic Nuclear and Particle Physics written by Yung-kuo Lim and published by World Scientific Publishing Company. This book was released on 2000 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomic and Molecular Physics : Atomic Physics (1001--1122) - Molecular Physics (1123--1142) - Nuclear Physics : Basic Nuclear Properties (2001--2023) - Nuclear Binding Energy, Fission and Fusion (2024--2047) - The Deuteron and Nuclear forces (2048--2058) - Nuclear Models (2059--2075) - Nuclear Decays (2076--2107) - Nuclear Reactions (2108--2120) - Particle Physics : Interactions and Symmetries (3001--3037) - Weak and Electroweak Interactions, Grand Unification Theories (3038--3071) - Structure of Hadros and the Quark Model (3072--3090) - Experimental Methods and Miscellaneous Topics : Kinematics of High-Energy Particles (4001--4061) - Interactions between Radiation and Matter (4062--4085) - Detection Techniques and Experimental Methods (4086--4105) - Error Estimation and Statistics (4106--4118) - Particle Beams and Accelerators (4119--4131).

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1986-02 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Data written by and published by . This book was released on 1986 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt: