Download or read book Nuclear Structure of Radioactive Neutron Rich Nuclei with 4pi Detector Arrays written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In-beam studies of [gamma]-ray spectroscopy of radioactive neutron-rich nuclei using the 4[pi] TIGRESS array at TRIUMF requires a ''tag'' to improve the selectivity of the detected [gamma] rays in the high [gamma]-ray background produced by radioactive beams and the need for Doppler-shift correction. We propose development of two types of large solid angle auxiliary charged particle detectors to be used in conjunction with TRIGRESS in order to provide the required tag. The initial phase of detector development will focus on research involving light-mass radioactive beams with Z [le] 20. Gas avalanche detectors, such as CHICO, are not the ideal detector for lighter ions. Therefore, a new detector system, called Bambino, is being developed that is based on commercially available CD type position-sensitive silicon detectors. Three CD-S2 detectors, with a thickness of 140 [micro]m, have been ordered from Micron Semiconductor Ltd. A split spherical target chamber will be built in Rochester to accommodate two of those CD detectors in both forward and backward directions. These detectors will be placed 3 cm from the target, providing an angular coverage from 20.1[sup o] to 49.4[sup o] for the forward hemisphere and from 130.6[sup o] to 159.9[sup o] for the backward hemisphere. The detectors will us ten 8-channels preamplifiers, from Swan Research, that will be mechanically mounted on both the entrance and exit beam pipes. The work on both the internal and external cables connecting the detectors to the preamplifiers, vacuum feedthrough etc. is in progress. In addition, a vacuum chamber has been ordered from Kurt J. Lesker Company for testing these detectors. Bambino should be ready by the spring 2006. The second phase will involve the development of a next generation CHICO-like gas avalanche detector for experiments involving heavier radioactive beams. CHICO, a highly segmented parallel-plate avalanche counter, has proven to be very successful when used in conjunction with Gammasphere [1-2]. It has an angular coverage of 2.8[pi] sr and an angular resolution of 1[sup o] in [theta] and 4.6[sup o] in [phi] in addition to a time resolution of 500 ps. The proposed new avalanche detector will have an improved position resolution that matches the (2 mm) achieved by TIGRESS. This longer-term detector development project is predicated on future funding and we actively seek collaborators. Such a detector system, used in conjunction with a thin target, allows the detection of both scattered and recoiling nuclei in kinematic coincidence providing a unique tag for the detected [gamma] rays and at the same time providing sufficient information for the proper Doppler-shift corrections. This detector system can accommodate many types of experiments involving (quasi) two-body kinematics, such as Coulomb excitation [2-7], few-nucleon transfer reactions [8-10], deep-inelastic reactions [11-16], and spontaneous fissions [1] or fusion-fission reactions [17-20] we have carried out in the past. The initial phase of proposed experiments will be to study, by Coulomb excitation, the issue of the ''island of inversion'' for the Mg isotopes in the N [approx] 20 region. The B(E2) values for the first 2[sup +] states of [sup 30,32,34]Mg have been measured using intermediate-energy Coulomb excitation at projectile fragmentation facilities. The B(E2) value for [sup 30]Mg also was measured recently via conventional Coulomb excitation at the CERN REX-ISOLDE facility. The spread in measured B(E2)'s of up to a factor of two is insufficient to distinguish among various shell model predictions. Obviously, more precise measurements are necessary to ascertain how well the shell model can predict the properties of neutron-rich nuclei. An accuracy about 5% for the measured B(E2) can be achieved assuming a three-day beam time with an intensity about 3 x 10[sup 4] p/s of [sup 32]Mg on a 3 mg/cm[sup 2] [sup 208]Pb target at E[sub lab] = 115 MeV. A measure of the shape or the static quadrupole moment of this nucleus, in addition to the B(E2) value, would be possible if the beam intensity were above 10[sup 6] p/s. When heavier radioactive beams become available at the ISAC-II facility, it will open new research opportunities for exploring the nuclear structure of neutron rich nuclei, including the evolution with isospin of two-phonon vibrations, prolate-to-oblate shape transitions, octupole deformation and neutron pairing.
Download or read book Fission and Properties of Neutron Rich Nuclei Proceedings of the Fourth International Conference written by and published by World Scientific. This book was released on 2008 with total page 769 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings are the fourth in the series of International Conferences covering fission and properties of neutron-rich nuclei, which are at the forefront of nuclear structure research. The time interval of 5 years between each conference allows for significant new results to be achieved. Recently, world leaders in theory and experiments in research and the development of new facilities for research presented their latest results in areas such as synthesis of superheavy elements, new facilities for and recent results with radioactive ion beams, structure of neutron-rich nuclei, nuclear fission process, fission yields and nuclear astrophysics. This book is a major source of the latest research in these areas and plans for the future. The conference brought together a unique group of over 100 speakers including the directors of the major nuclear laboratories in Canada, France, Germany, Japan, Russia and the US along with leading research scientists from around the world.
Download or read book Investigations of Nuclear Structure written by and published by . This book was released on 2015 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proposal addresses studies of nuclear structure at low-energies and development of instrumentation for that purpose. The structure studies deal with features of neutron-rich nuclei with unexplored shapes (football- or pear-shaped nuclei). The regions of interest are: neutron rich nuclei like 132-138Sn, or 48-54Ca, and the Zr, Mo, and Ru isotopes. The tools used can be grouped as follows: either Gammasphere or Gretina multi-gamma detector arrays and auxiliary detectors (Microball, Neutron Shell, and the newly completed Phoswich Wall). The neutron-rich nuclei are accessed by radioactive-beam binary reactions or by 252Cf spontaneous fission. The experiments with heavy radioactive beams aim at exciting the beam nuclei by pick-up or transfer a neutron or a proton from a light target like 13C, 9Be, 11B or 14N .For these binary-reaction studies the Phoswich Wall detector system is essential. It is based on four multi-anode photomultiplier tubes on which CsI and thin fast-timing plastic scintillators are attached. Their signals are digitized with a high density microchip system.
Download or read book Changing Facets of Nuclear Structure written by Aldo Covello and published by World Scientific. This book was released on 2008 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a comprehensive survey by international experts of recent developments in the field of nuclear structure. Both experimental and theoretical issues are covered. On the experimental side, the latest research and the envisaged developments in the most important laboratories, where radioactive ion beams are available, are reviewed in detail. On the theoretical side, the various approaches to a fundamental theory of nuclear structure starting from the nucleon-nucleon interaction are discussed, going from few-body systems, where ?ab initio? calculations are possible, to complex nuclei, where the shell model plays a key role. Results of current experimental and theoretical studies on exotic nuclei are also presented.
Download or read book Nuclear Structure Study with Neutrons written by J. Ero and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on "Nuclear Structure Study with Neutrons" or ganized in Budapest between 31st July and 5th August. 1972. was the successor of a meeting held seven years ago in Antwerp. The close links between the two conferences were revealed not in name alone but. more importantly. in the choice of subjects discussed. As in Antwerp. the lectures and contributions to the Budapest Conference could be grouped under the following five main headings: nuclear spectroscopy; the optical model; the statistical model and intermediate structures; the mechanism of neutron capture and non-statistical effects; and, finally. miscellaneous special topics. The invited papers on the one hand summarizing recent developments and current thinking in one of the above main topics. and the other surveying the most important results of the contributed papers submitted to the Conference. were presented on the plenary sessions. Most of the contributed papers were read in full on three parallel sessions. This volume contains the complete text of all the lectures delivered in the plenary sessions and abstracts of the contributed papers. The invited talks were presented at the Conference in a rather random order because of technical reasons, it seemed. however, more sensible to change their order according to their subjects and to print them grouped under the above main headings. Further more we divided the Proceedings into two main parts, the first containing only the lectures of summarizing character. the second including the abstracts of the contributions together with the surveying talks.
Download or read book Nuclear Structure Problems Proceedings of the French Japanese Symposium written by Hideaki Otsu and published by World Scientific. This book was released on 2013 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains the papers presented in the FrenchOCoJapan Symposium on Nuclear Structure Problems, held in January 2011 at RIKEN Wako Campus with 100 participants.Based on the long history of collaboration between France and Japan in the field of nuclear physics, various problems in recent and future studies are discussed. Emphasis is on the structure of nuclei far from the stability, reactions involving stable and unstable nuclei, nuclear processes and properties of astrophysical interest, synthesis of super-heavy elements, and instrumentation and accelerator projects."
Download or read book Nuclear Shapes and Nuclear Structure at Low Excitation Energies written by Michel Vergnes and published by Springer Science & Business Media. This book was released on 1992 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings of the NATO workshop held June 1991, in Cargese, France, comprise papers on atomic methods in nuclear spectroscopy, single particles aspect, multiphonon states, shapes and coexistence, ocupoles, superdeformation, exotic nuclei, and experimental techniques. Contributors are from bot"
Download or read book Changing Facets Of Nuclear Structure Proceedings Of The 9th International Spring Seminar On Nuclear Physics written by Aldo Covello and published by World Scientific. This book was released on 2008-05-30 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a comprehensive survey by international experts of recent developments in the field of nuclear structure. Both experimental and theoretical issues are covered. On the experimental side, the latest research and the envisaged developments in the most important laboratories, where radioactive ion beams are available, are reviewed in detail. On the theoretical side, the various approaches to a fundamental theory of nuclear structure starting from the nucleon-nucleon interaction are discussed, going from few-body systems, where “ab initio” calculations are possible, to complex nuclei, where the shell model plays a key role. Results of current experimental and theoretical studies on exotic nuclei are also presented.
Download or read book Nuclear Structure from a Simple Perspective written by R. F. Casten and published by Oxford University Press. This book was released on 1990-04-26 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a useful survey and assessment of the study of low-energy collective and single particle excitations of medium and heavy nuclei. An ideal resource for graduate students, the book covers both experimental and theoretical perspectives. The author's simple intuitive approach will help the reader to understand the empirical systematics as well as detailed model calculations, without recourse to complex--and often--confusing formalism.
Download or read book Nuclear Structure Far from Stability written by Aldo Covello and published by IOS Press. This book was released on 2008 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gives an account of advances and various perspectives in the study of nuclei far from stability. This book deals with book nuclear structure models and their derivation from the basic nucleon-nucleon interaction. It discusses: the shell model, the interacting boson model and the cluster model."
Download or read book New Perspectives In Nuclear Structure Proceedings Of The 5th International Spring Seminar On Nuclear Physics written by Aldo Covello and published by World Scientific. This book was released on 1996-05-09 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: This seminar focuses on recent achievements and new goals of nuclear structure in both experiment and theory. Several topics at the forefront of current research in this field are covered by major experts. The main themes are: exotic nuclei; the present role and perspectives of the shell model; modes of excitation in deformed and superdeformed nuclei; and nuclear astrophysics.
Download or read book Structure of Atomic Nuclei written by L. Satpathy and published by Alpha Science Int'l Ltd.. This book was released on 1999 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is an outcome or a SERC School on the nuclear physics on the theme ?Nuclear Structure?. The topics covered are nuclear many-body theory and effective interaction, collective model and microscopic aspects of nuclear structure with emphasis on details of technique and methodology by a group of working nuclear physicists who have adequate expertise through decades of experience and are generally well known in their respective fieldsThis book will be quite useful to the beginners as well as to the specialists in the field of nuclear structure physics.
Download or read book Structure And Reactions Of Unstable Nuclei Proceedings Of The International Symposium written by Yoichiro Suzuki and published by World Scientific. This book was released on 1992-01-30 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings focuses on the recent developments in the physics of unstable nuclei. The topics include: masses and radii of exotic nuclei, structure and decay of unstable nuclei, neutron-halo and excitations of neutron drip-line nuclei, new aspects of reaction dynamics induced by exotic nuclear projectiles, production and reactions of radioactive nuclear beams, and synthesis of superheavy elements.
Download or read book Nuclear Structure written by Giovanni Bonsignori and published by World Scientific. This book was released on 2001 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Conference OC Bologna 2000: Structure of the Nucleus at the Dawn of the CenturyOCO was devoted to a discipline which has seen a strong revival of research activities in the last decade. New experimental results and theoretical developments in nuclear physics will certainly make important contributions to our knowledge and understanding of Nature's fundamental building blocks. The interest aroused by the Conference among the scientific community was clearly reflected in the large number of participants. These represented the most important nuclear physics laboratories in the world. The Conference covered five major topics of modern nuclear physics: nuclear structure, nucleusOConucleus collisions, hadron dynamics, nuclear astrophysics, and transdisciplinary and peaceful applications of nuclear science. It reviewed recent progress in the field and provided a forum for the discussion of current and future research projects. Contents: Structure of Nuclei Far from the Valley of Beta-Stability; Nuclear Structure; Physics of High Spin States; Symmetries in Nuclear Structure; Collective Excitations; Nuclear Structure at Finite Temperature. Readership: Nuclear physicists."
Download or read book Shell Structure and Evolution of Collectivity in Nuclei written by Ritesh Kshetri and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied two regions of doubly closed shell nuclei over the nuclear chart: stable nuclei with N Z around 40Ca and highly neutron-rich ones close to drip-line above the 132Sn shell closure. Both experimental and theoretical works have been performed for each of these mass regions. The experimental part includes three works: (i) high energy characterization of the Compton suppressed Clover detector, (ii) In-beam gamma-ray spectroscopic studies of high spin states of 35Cl in mass 40 region and (iii) X- and gamma- ray spectroscopic studies of fission fragments of 252Cf spontaneous fission source in mass 132Sn region. The theoretical study supplemented the experimental findings using the microscopic Shell model and the phenomenological Particle Rotor model. Our work emphasizes that the issues thought to be relevant for nuclei away from stability, should also be studied over a broader region of nuclear territory. With the latest developments in the experimental facilities, the nuclei near the stability line should be re-investigated for finding possible correlations with those away from stability.
Download or read book Key Topics In Nuclear Structure Proceedings Of The 8th International Spring Seminar On Nuclear Physics written by Aldo Covello and published by World Scientific. This book was released on 2005-03-21 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: Key Topics in Nuclear Structure is the eighth in a well established series of conferences and is devoted to the discussion of significant topics in nuclear structure. Both experimental and theoretical issues at the forefront of current research on the subject are covered by leading physicists. In particular, on the experimental side the state of the art and the envisaged developments in the most important laboratories, where rare isotope beams are available, are reviewed in detail. On the theoretical side, the various approaches to a fundamental theory of nuclear structure starting from the nucleon-nucleon interaction are discussed, ranging from the few-body systems, where ab initio calculations are possible, to the complex nuclei, where the shell model plays a key role.The proceedings have been selected for coverage in:• Index to Scientific & Technical Proceedings® (ISTP® / ISI Proceedings)• Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)• CC Proceedings — Engineering & Physical Sciences
Download or read book Frontiers in Nuclear Structure written by and published by . This book was released on 2001 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this brief review was to discuss various facts of nuclear structure physics. The list of topics covered is by no means complete due to time and space constraints. In years to come, they shall see substantial progress in their understanding of molecular structure--a rich and interdisciplinary field. An important element in this task is to extend the study of nuclei into new domains. New radioactive beam facilities, together with advanced multi-detector arrays and mass/change separators, is essential in probing nuclei in new domains where new phenomena, likely to be different from anything they have observed to date, will occur. The new data are expected to bring qualitatively new information about the fundamental properties of the nucleonic many-body system and will be crucial for developing a unified description of the nucleus.
