Download or read book Isomer and delayed gamma ray spectroscopy for structure studies of heavy neutron rich nuclei written by Nawras M. S. Al-Dahan and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Isomer and beta delayed Gamma ray Spectroscopy for Structure Studies of Heavy Neutron rich Nuclei written by Nawras M. S. Al-Dahan and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fission And Properties Of Neutron rich Nuclei Proceedings Of The Sixth International Conference On Icfn6 written by Joseph H Hamilton and published by World Scientific. This book was released on 2017-09-28 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim and scope of the conference and book were to bring world leaders in the areas of fission, structure of neutron-rich nuclei, superheavy elements, astrophysics and new facilities for these research areas to present the latest developments in both theory and experiment to serve as benchmarks for future research.World leaders describe the latest research including development of new facilities under construction to point out the latest and future direction in research. These proceedings are published following the conferences every four to five years since 1997.
Download or read book Gamma ray Spectroscopy of Neutron rich Products of Heavy ion Collisions written by and published by . This book was released on 1995 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thick-target [gamma][gamma] coincidence techniques are being used to explore the spectroscopy of otherwise hard-to-reach neutron-rich products of deep-inelastic heavy ion reactions. Extensive [gamma][gamma] coincidence measurements were performed at ATLAS using pulsed beams of 8°Se, 136Xe, and 238U on lead-backed {sup 122,124}Sn targets with energies 10-15% above the Coulomb barrier. Gamma-ray coincidence intensities were used to map out yield distributions with A and Z for even-even product nuclei around the target and around the projectile. The main features of the yield patterns are understandable in terms of N/Z equilibration. We had the most success in studying the decays of yrast isomers. Thus far, more than thirty new [mu]s isomers in the Z = 50 region were found and characterized. Making isotopic assignments for previously unknown [gamma]-ray cascades proves to be one of the biggest problems. Our assignments were based (a) on rare overlaps with radioactivity data, (b) on the relative yields with different beams, and (c) on observed cross-coincidences between [gamma] rays from light and heavy reaction partners. However, the primary products of deep inelastic collisions often are sufficiently excited for subsequent neutron evaporation, so [gamma][gamma] cross-coincidence results require careful interpretation.
Download or read book Neutron Capture Gamma Ray Spectroscopy written by R. E. Chrien and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 875 pages. Available in PDF, EPUB and Kindle. Book excerpt: The post World War II era witnessed a tremendous growth in the research carried out in neutron-induced reactions and especially in neutron capture y-ray studies. This growth was stimulated by the availability of neutron sources, such as reactors and accelerators, and by the development of high resolution y-ray and conversion electron detectors. Today the combination of high flux reactors and precise instrumentation has produced spectral data of exceptional quality, as the pages of these proceedings illustrate. The world-wide community of the practioners of the art of cap ture y-ray spectroscopy has met three times in the last decade: the first international symposium on this subject was held at Studsvik, Sweden in 1969, and the second at Petten, The Netherlands in 1974. A smaller meeting, of mostly u. S. and some European parti cipation, was held at Argonne National Laboratory in 1966. A perusal of the proceedings of these meetings shows the striking ad vances in this now mature field of physics over the last dozen years. Each meeting has seen a small but perceptible increase in the number of papers presented and the number of laboratories repre sented. More importantly, each meeting has documented the increasing impact of (n,y) reasearch, not only on other areas of basic physics, but also on commercial and medical applications of this technology. A total of 29 invited papers and 97 contributed papers were presented at this symposium.
Download or read book Exotic Nuclear Spectroscopy written by William C. McHarris and published by Springer. This book was released on 1990 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. Atomic Mass Measurements with Radioactive Beams and/or Targets: Where to Start.- 2. A Recoil Mass Spectrometer for the HHIRF Facility.- 3. The Study of Exotic N ? 82 Nuclei Using the Daresbury Recoil Mass Separator.- 4. Spectroscopic Techniques in the Study of Radioactive Nuclei Far from Stability: Results for the Z = 82 Region.- 5. Nuclear Decay Studies Far from Stability.- 6. Accelerated Radioactive Nuclear Beams (Low Energy).- 7. A Technique for Proton Drip-Line Studies via Fusion-Evaporation Reactions.- 8. Nuclear Structure in the Neutron-Rich Doubly-Magic 78Ni Region.- 9. Nuclear Spectroscopy in the Rare-Earth Region Near the Proton Drip Line.- 10. Shapes and Moments of Odd -A Pt Nuclei (177?A?195).- 11. Towards Superheavy Nuclei-Status and Prospects for the Production and Investigation of Heavy Elements.- 12. Reflection-Asymmetric Shapes in Nuclei.- 13. Reflection Asymmetry and Fission Yields in the Mass-145 Region and a Possible Route to Superheavy-Element Synthesis.- 14. Quadrupole and Octupole Shapes in Nuclei.- 15. Gammasphere.- 16. Evidence for Octupole-Octupole and Quadrupole-Octupole Excitations in Spherical Nuclei.- 17. Spin-Stabilized Deformation in Transitional Nuclei.- 18. Shape Evolution Studies in the A = 70 Region.- 19. Shape and Structural Changes in Nuclei at High Spin and Temperature.- 20. Shell-Model Calculations for Exotic Nuclei.- 21. Recent Results on Superdeformation.- 22. Nuclear Collectivity and Complex Alignment Mechanisms in Light W and Os Nuclei.- 23. Discrete-Line Spectroscopy in Superdeformed Nuclei.- 24. High-Spin Properties of Doubly-Odd Nuclei of Mass x 130.- 25. Rotational-Band Structure in Odd-Odd Re Nuclei.- 26. Double Decoupling in Deformed Doubly-Odd Nuclei.- 27. Deformed Odd-Odd Nuclei: Matrix Elements for the Residual p-n Interaction and Patterns of Alternating Perturbations in Level Spacings.- 28. Proton-Neutron Interactions in the A = 100 Nuclides.- 29. Dynamical Symmetries for Fermions.- 30. ? Particles as Probes of Nuclear Shape in the Rare Earths and Structure Effects on Proton Emission in the Mass-80 Region.- 31. Fast ? Transitions and Intrinsic Structures in Deformed Nuclei.- 32. Intruder States, Coexistence, and Approaches to Deformation: The Study of 120Xe and the N = 66 Isotones.- 33. Global Trends and Structural Consequences of the Proton-Neutron Interaction.- 34. IBFFA Calculations of Odd-Odd Nuclei.- 35. Delayed-Neutron Emission Probabilities of Li-F Nuclides.- 36. Exotic Decays at the Proton Drip Line.- 37. Delayed Fission of Light Am Isotopes.- 38. High-Spin Spectroscopy for Odd-Z Nuclei with A ? 160.- 39. Fast Chemical Separations for the Study of Short-Lived Nuclides.- 40. Rotational Population Patterns and Searches for the Nuclear SQUID.- 41. Time-Resolved and Time-Integral Studies of Nuclear Relaxation: An Extension of the On-Line Nuclear Orientation Technique to Shorter Half-Lives.- 42. Exotic Nuclear Spectroscopy-Remembrance of Past Futures.- Author Index.- Nuclide Index.
Download or read book Nuclear Structure of Neutron Rich 34P Using In beam Gamma Ray Spectroscopy written by Peter C. Bender and published by . This book was released on 2011 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Increasing dominance of negative parity intruder states in neutron-rich nuclei in the sd shell as $N$ approaches $20$ shows evidence of evolving shell structure. Systematically examining the structure of isotopes with increasing $N$ while filling the $ u d_{3/2}$ level highlights a large number of intruder configurations. These intruder configurations come from the decrease in energy to promote a neutron across the $N = 20$ shell gap. Such studies are needed to help in the refinement of the shell model and increase its predictive power for nuclei far from stability. The presented work chronicles a series of $^{18}$O($^{18}$O, $pn$) experiments conducted around the world to study high spin states in $^{34}$P, a nucleus in the $sd$ shell bordering the ``island of inversion'. One of these experiments which was conducted at Argonne National Laboratory where a 24 MeV neutron rich $^{18}$O beam impinged on a Ta backed $^{18}$O target, is presented here in great detail. The evaporated charged particles were detected with {sc microball} while the $gamma$ rays emitted were detected with {sc gammasphere}. A brief discussion of the theory of analysis techniques used in in-beam $gamma$-ray spectroscopy is presented followed by an in depth discussion of the analysis of this experiment.
Download or read book Isomers in Stable and Neutron rich Hafnium Nuclei Using Inelastic transfer Reactions and Gamma ray Spectroscopy written by Rick D'Alarcao and published by . This book was released on 2000 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In beam Gamma ray Spectroscopy with RIB on Very Neutron rich Nuclei written by M. Ishihara and published by . This book was released on 2000 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigating Nuclear Structure with Reaccelerated Rare isotope Beams Using Gamma ray Spectroscopy written by John Edward Ash and published by . This book was released on 2021 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discovering unexplored high-spin states in neutron-rich nuclei can open up a new direction to study band structure and the associated shell structure in isospin-asymmetric many-body systems. However, experimental reach has so far been limited to neutron-deficient or stable nuclei which are preferentially produced in fusion reactions used in such studies. By using neutron-rich rare-isotope beams, this limitation can be effectively removed, exposing previously inaccessible nuclei to this proven approach.This dissertation reports an experiment designed to kick off a spectroscopy program to study nuclear structure by means of low-energy nuclear reactions with reaccelerated rare-isotope beams available from the ReA3 facility at National Superconducting Cyclotron Laboratory. A 40Ar stable beam and a 45K rare-isotope beam impinged on a self-supporting lithium target to produce products ranging from argon to titanium via both direct and compound nucleus reactions. These mechanisms provide complementary tools to study the single-particle and collective natures of the states being probed. Using particle and gamma-ray coincidence relations between a silicon charged-particle detector and the Segmented Germanium Array, reaction channels were distinguished, and new properties were revealed, including for the nuclei 46Ca and 47K. For 46Ca, three new higher-lying states around 6 MeV and five new gamma-ray transitions were identified, suggesting three independent band structures formed from different particle-hole configurations. The rotational-like band built on the 0+2 state is established up to the tentatively assigned 6+2 state. New results are compared to large-scale shell model calculations, confirming the validity of the effective interaction describing particle-hole excitations across the Z=20 and N=28 shell gaps in the vicinity of doubly-magic 48Ca. Shape coexistence observed in lighter-mass calcium isotopes is suggested to persist in 46Ca, albeit as part of a transition from neutron to proton cross-shell excitations. For 47K, differential cross sections were extracted for the two-neutron transfer channel related to the present intruder configuration. Comparisons to Coupled Reaction Channels calculations indicate strong single-particle character for the states and a direct one-step process for the reaction itself. This work successfully developed the experimental techniques to use reaccelerated beams for spectroscopy of hitherto unexplored nuclei and demonstrated the ability of this approach to expand the experimental reach of nuclear structure studies.
Download or read book Gamma Ray Spectroscopy of Neutron rich Chlorine Nuclei written by David O'Donnell and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A beam of 36/16S20 at 215 MeV was used to bombard a 300 ugcm-2 thick target of 208/82Pb126 in order to initiate deep-inelastic and multi-nucleon transfer reactions. The I-ray decay of the reaction products was studied using the CLARA array of escape suppressed germanium detectors which was coupled to the large-angular-acceptance magnetic spectrometer PRISMA, in which the velocity, mass, atomic number and kinetic energy of the reaction products was measured. Determination of the velocity and mass has allowed Doppler corrected [gamma]-ray spectra to be obtained for each individual projectile-like nuclide to be produced. Seven neutron-rich isotopes of Cl have been populated and their decay by [gamma]-ray emission has been studied. Decay schemes have been constructed and compared to the results of shell-model calculations. Previously unreported transitions have been observed in 38Cl, 40Cl, 41Cl and 42Cl. ___.
Download or read book Spectroscopic Studies of Neutron rich 129Sn and 80Ge Nuclei Using the GRIFFIN Spectrometer written by Fátima García and published by . This book was released on 2021 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopic studies provide information about the structure of nuclei. Information that, in turn, serves to inform theoretical models and astrophysical studies.Recent work using the GRIFFIN spectrometer at TRIUMF has uncovered novel information in two isotopes, $^{129}$Sn and $^{80}$Ge, which lie close to the two magic nuclei: $^{132}$Sn and $^{78}$Ni, respectively. The work on $^{129}$Sn observed 31 transitions and 9 excited states for the first time, populated through the $\beta$-decay of $^{129}$In. Most notably, this experiment was the first to observe the $\beta$-decay of the $(29/2^{+})$ 1911-keV isomer of $^{129}$In. The work on $^{80}$Ge searched for a previously observed $0^{+}$ state at 639-keV, just below the $2^{+}$ 659-keV excited state, through the $\beta$-decay of $^{80}$Ga. The presence of the former was proposed as evidence for low-energy shape coexistence in $^{80}$Ge, in the region around doubly-magic $^{78}$Ni, though further signatures for the presence of this state were missing. The GRIFFIN experiment was unable to observe this state, despite using a superior detector system and observing higher statistics . The nonobservation, coupled with theoretical calculations performed, led to the conclusion that this $0^{+}$ 639-keV does not exist. Furthermore, the analysis observed, for the first time, 66 excited states and 157 $\gamma$-ray transitions, which were added to the known $^{80}$Ge level scheme. The data here presented will serve to improve upon existing nuclear structure theories and will inform future applications of nuclear science to fields such as astrophysics.
Download or read book Fission And Properties Of Neutron rich Nuclei Proceedings Of The Third International Conference written by Joseph H Hamilton and published by World Scientific. This book was released on 2003-10-16 with total page 859 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents more than 100 papers devoted to the understanding of fission processes and neutron-rich nuclei. All forms of fission, from spontaneous fission of 252Cf to high-energy fragmentation, are included. Together with studies on properties of neutron-rich nuclei and astrophysics, the book also features new experimental techniques, directions and the emerging new radioactive beam facilities.
Download or read book Fission and Properties of Neutron rich Nuclei written by Joseph H. Hamilton and published by World Scientific. This book was released on 2003 with total page 859 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting more than 100 papers devoted to the understanding of fission processes and neutron-rich nuclei, this book covers all forms of fission, from spontaneous fission of 252Cf to high-energy fragmentation. Together with studies on properties of neutron-rich nuclei and astrophysics, the book also features new experimental techniques, directions and the emerging new radioactive beam facilities.
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 Passive Nondestructive Assay of Nuclear Materials written by Doug Reilly and published by . This book was released on 1991 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Generators for Analytical Purposes written by International Atomic Energy Agency and published by IAEA Radiation Technology Repo. This book was released on 2012 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication addresses recent developments in neutron generator (NG) technology. It presents information on compact instruments with high neutron yield to be used for neutron activation analysis (NAA) and prompt gamma neutron activation analysis in combination with high count rate spectrometers. Traditional NGs have been shown to be effective for applications including borehole logging, homeland security, nuclear medicine and the on-line analysis of aluminium, coal and cement. Pulsed fast thermal neutron analysis, as well as tagged and timed neutron analysis, are additional techniques which can be applied using NG. Furthermore, NG can effectively be used for elemental analysis and is also effective for analysis of hidden materials by neutron radiography. Useful guidelines for developing NG based research laboratories are also provided in this publication.
