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Direct Mass Measurements Of Light Neutron Rich Nuclei Using Fast Recoil Spectrometers
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Book Synopsis Direct Mass Measurements of Light Neutron-rich Nuclei Using Fast Recoil Spectrometers by :
Download or read book Direct Mass Measurements of Light Neutron-rich Nuclei Using Fast Recoil Spectrometers written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive new mass measurement capabilities have evolved with the development of recoil spectrometers. In the Z = 3 to 9 neutron-rich region alone, 12 neutron-rich nuclei have been determined for the first time by the fast-recoil direct mass measurement method. A recent experiment using the TOFI spectrometer illustrates this technique. A systematic investigation of nuclei that lie along or near the neutron-drip line has provided a valuable first glimpse into the nuclear structure of such nuclei. No evidence for a large single-particle energy gap at N = 14 is observed; however, a change in the two-neutron separation model calculations, and is interpreted in terms of the smaller 1s12 - 1s12 interaction compared to that of the 0d52 - 0d52 neutron-neutron interaction. 18 refs., 7 figs., 1 tab.
Book Synopsis Direct Mass Measurements in the Light Neutron-rich Region Using a Combined Energy and Time-of-flight Technique by :
Download or read book Direct Mass Measurements in the Light Neutron-rich Region Using a Combined Energy and Time-of-flight Technique written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, masses have been determined one at a time via decay or reaction Q-value measurements. In general only after several such individual measurements could one establish a trend in the binding energies and thus develop an improved understanding of the nuclear mass surface. With the advancement of online mass spectrometers, it became possible to measure long isotopic sequences. Although only alkali elements have been extensively measured to date, this technique has proved successful in revealing sudden changes in nuclear structure and in pointing out systematic deficiencies of various mass models. In the experiment described herein, we have worked to extend mass measurement capabilities one step further with the development of a more general approach in which a whole series of nuclei can be measured simultaneously, independent of their N or Z. Below we demonstrate that direct mass measurements can be performed for fast recoiling nuclei using a combined energy and time-of-flight (i.e., M proportional to ET2) technique.
Book Synopsis Direct Mass Measurements of Light Neutron-rich Nuclei Using The Time of Flight Isochronous (TOFI) Magnetic Spectrometer by : Kamran Vaziri
Download or read book Direct Mass Measurements of Light Neutron-rich Nuclei Using The Time of Flight Isochronous (TOFI) Magnetic Spectrometer written by Kamran Vaziri and published by . This book was released on 1987 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct Mass Measurements of Light Neutron-rich Nuclei Using a Combined Energy and Time-of-flight Technique by : Chandrasekhara Pillai
Download or read book Direct Mass Measurements of Light Neutron-rich Nuclei Using a Combined Energy and Time-of-flight Technique written by Chandrasekhara Pillai and published by . This book was released on 1985 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exploration of the Neutron-rich Mass Surface from Sup 11 Li to Sup 66 Fe by :
Download or read book Exploration of the Neutron-rich Mass Surface from Sup 11 Li to Sup 66 Fe written by and published by . This book was released on 1991 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A small revolution in our ability to perform mass measurements of light-mass, neutron-rich nuclei has occurred during the last five years with the extension of the direct, total mass measurement method to fast recoiling nuclei. To date the work of two groups, one using the SPEG spectrometer at GANIL and the other using the TOFI spectrometer at LAMPF, has yielded over 85 mass measurements of which 62 had not been reported previously. Extending from the neutron-halo nucleus 11Li up to 66Fe, a region relevant to the astrophysical r-process, these measurements have provided a valuable first glimpse into the interesting nuclear structure present in many of these exotic nuclei. Herein we highlight the nuclear structure insight which as been gained from these measurements, especially that learned from a comparison to recent shell model calculations. Attention is given to: (1) the binding of loosely-bound neutron halo nuclei; (2) the N=14--16 region in the neutron-rich isotopes of O, F, and Ne where the strong two-body interaction plays an important role; (3) the deformed intruder state region around 31Na of long standing interest; (4) the neutron-rich isotopes of sulfur and chlorine; and (5) the question of the isospin dependence (or independence) of neutron and proton pairing energies in the fp shell. Only the briefest account of this work can be given here; emphasis is placed on the most recent results. 24 refs., 3 figs.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of Los Alamos Research by : Los Alamos National Laboratory
Download or read book Publications of Los Alamos Research written by Los Alamos National Laboratory and published by . This book was released on 1987 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclei Far From Stability:5th International Conference by : Ian Stuart Towner
Download or read book Nuclei Far From Stability:5th International Conference written by Ian Stuart Towner and published by New York : American Institute of Physics. This book was released on 1988 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mass Measurements of Light Neutron Rich Nuclei by : P. J. Woods
Download or read book Mass Measurements of Light Neutron Rich Nuclei written by P. J. Woods and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct Mass and Lifetime Measurements of Neutron-rich Nuclei Up to A[approximately]100 Using the TOFI Spectrometer at LAMPF. by :
Download or read book Direct Mass and Lifetime Measurements of Neutron-rich Nuclei Up to A[approximately]100 Using the TOFI Spectrometer at LAMPF. written by and published by . This book was released on 1993 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was directed toward the study of neutron-rich nuclei using the experimental facilities at LAMPF, which is a part of LANL. The principal results of the investigation include the discovery of many new isotopes along with a measurement of their masses and in particular those nuclides in the Z = 7--19 and 14 --26 regions of the chart of the nuclides. Thirty-four new nuclides were detected and studied with their masses being measured with relatively high accuracy, and an additional twenty-six that were previously known and measured were remeasured to an improved accuracy. Besides providing new information about the mass surface in new and extended redons of the chart of the nuclides, this investigation enabled properties and previously unknown structure of some of the nuclei to be determined such as nuclear deformation among some of the nuclides. Also a study of the neutron pairing gaps and the proton pairing gaps among these nuclides was made. Other developments also achieved included instrument (TOFI) improvements and upgrades and theoretical investigations into the masses of the hadrons.
Book Synopsis Direct Mass and Lifetime Measurements of Neutron-rich Nuclei Up to A["00 Using the TOFI Spectrometer at LAMPF. Final Report, April 15, 1986--March 14, 1992 by :
Download or read book Direct Mass and Lifetime Measurements of Neutron-rich Nuclei Up to A["00 Using the TOFI Spectrometer at LAMPF. Final Report, April 15, 1986--March 14, 1992 written by and published by . This book was released on 1993 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was directed toward the study of neutron-rich nuclei using the experimental facilities at LAMPF, which is a part of LANL. The principal results of the investigation include the discovery of many new isotopes along with a measurement of their masses and in particular those nuclides in the Z = 7--19 and 14 --26 regions of the chart of the nuclides. Thirty-four new nuclides were detected and studied with their masses being measured with relatively high accuracy, and an additional twenty-six that were previously known and measured were remeasured to an improved accuracy. Besides providing new information about the mass surface in new and extended redons of the chart of the nuclides, this investigation enabled properties and previously unknown structure of some of the nuclei to be determined such as nuclear deformation among some of the nuclides. Also a study of the neutron pairing gaps and the proton pairing gaps among these nuclides was made. Other developments also achieved included instrument (TOFI) improvements and upgrades and theoretical investigations into the masses of the hadrons.
Download or read book Physics Briefs written by and published by . This book was released on 1988 with total page 1160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Techniques in Nuclear Physics by : Dorin N. Poenaru
Download or read book Experimental Techniques in Nuclear Physics written by Dorin N. Poenaru and published by Walter de Gruyter. This book was released on 2011-09-12 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis General Principles of a Proton Recoil Fast-neutron Spectrometer by : Ben Roger Gossick
Download or read book General Principles of a Proton Recoil Fast-neutron Spectrometer written by Ben Roger Gossick and published by . This book was released on 1953 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclei Far From Stability and Atomic Masses and Fundamental Constants 1992. by : R. Neugart
Download or read book Nuclei Far From Stability and Atomic Masses and Fundamental Constants 1992. written by R. Neugart and published by CRC Press. This book was released on 1993-05-01 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclei Far from Stability and Atomic Masses and Fundamental Constants 1992 presents a collection of 200 papers presented at two conferences that were held concurrently. Particular attention is paid to developments in the field of nuclear physics with energetic secondary beams and the increase of precision in the determination of atomic masses. Topics covered include nuclear spectroscopy and nuclear shapes, the heaviest elements, fission and cluster radioactivity, beta decay, coupling constants, neutrino mass, moments and radii, nuclei near the drip line and their structure, atomic masses, nuclear aspects in astrophysics, and experimental developments.
Book Synopsis A Phase-imaging Technique for Precision Mass Measurements of Neutron-rich Nuclei with the Canadian Penning Trap Mass Spectrometer by : Rodney Orford
Download or read book A Phase-imaging Technique for Precision Mass Measurements of Neutron-rich Nuclei with the Canadian Penning Trap Mass Spectrometer written by Rodney Orford and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The nuclear mass is a fundamental property of a nucleus because it defines the binding energy which represents the sum of all internal interactions. Masses provide insight into nuclear structure effects and are influential in describing heavy element nucleosynthesis via the rapid neutron-capture (??) process. More nuclear data, including masses, on the neutron-rich side of stability is needed to improve upon the current understanding of the ?? process. The Canadian Penning Trap (CPT) mass spectrometer is located at the CARIBU facility where intense beams of neutron-rich nuclei are created. To take advantage of the unique beams available at CARIBU an upgrade to the phase-imaging ion-cyclotron-resonance (PI-ICR) mass measurement technique at the CPT has been completed, vastly improving the experimental sensitivity. Compared to the previous system this new technique is faster, more efficient, and offers improved mass resolution and higher mass precision. In this thesis the implementation of PI-ICR at the CPT is detailed alongside a thorough study of the associated systematic effects. A total of 54 neutron-rich nuclear masses are presented ranging between mass numbers of ?? = 104-168, including 18 which have been measured for the first time and 29 where a reduction in the mass uncertainty has been made. The majority of the new measurements are of rare-earth elements near ?? = 100. Trends along several isotopic chains are discussed and the impact of these measurements in explaining a possible formation mechanism of the rare-earth elemental abundance peak during the ?? process is given." --
Book Synopsis Precision Measurements to Test the Standard Model and for Explosive Nuclear Astrophysics by : Adrian A. Valverde
Download or read book Precision Measurements to Test the Standard Model and for Explosive Nuclear Astrophysics written by Adrian A. Valverde and published by Springer Nature. This book was released on 2019-11-22 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents two significant results in the field of precision measurements in low-energy nuclear physics. Firstly, it presents a precise half-life determination of 11C, leading to the most precise ft-value for a beta decay transition between mirror nuclides, an important advance in the testing of the electroweak sector of the Standard Model. Secondly, it describes a high-precision mass measurement of 56Cu, a critical nucleus for determining the path of the astrophysical rapid-proton capture process, performed by the author using the LEBIT Penning trap at the National Superconducting Cyclotron Laboratory. This new measurement resolves discrepancies in previously-reported calculated mass excesses. In addition, the thesis also presents the construction and testing of a radio-frequency quadrupole cooler and buncher that will be part of the future N = 126 factory at Argonne National Laboratory aimed at producing nuclei of interest for the astrophysical rapid-neutron capture process for the first time.
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