Fission and properties of neutron rich nuclei hamilton j h ramayya a v. AKUNURI V. RAMAYYA 2019-01-25

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Information on neutron

fission and properties of neutron rich nuclei hamilton j h ramayya a v

The time interval of 5 years between each conference allows for significant new results to be achieved. In the 1950s, experimental and theoretical studies showed that in the gs many nuclei are spheroidal in shape rather than spherical. Donangelo, Third International Conference on Fission and Properties of Neutron-Rich Nuclei, J. 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. 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.

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(PDF) Triaxiality in Neutron

fission and properties of neutron rich nuclei hamilton j h ramayya a v

C68, 034330 8 pages 2003. C69, 024315 15 pages 2004. 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. Projected shell model and potential-energy surface calculations were performed and were compared to the experimental data of Nb-106 and the previously reported Nb-104. Beam dynamics, field calculations, and ion optics; auxiliaries and components ion sources, injection and extraction systems, experimental facilities and equipment ; and storage rings are included.

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Information on neutron

fission and properties of neutron rich nuclei hamilton j h ramayya a v

World leaders describe the latest research including development of new facilities under construction to point out the latest and future direction in research. 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 U. C69, 057301 4 pages 2004. Carter, Third International Conference on Fission and Properties of Neutron-Rich Nuclei, Singapore: World Scientific, 824 pages 2003. In the last few years the study of such {gamma} rays has produced a dramatic increase in the available information on the structure of neutron-rich nuclei. Prompt triple γ coincidence studies of the nuclei produced in the spontaneous fission of 252Cf were carried out at Gammasphere. In this paper we present research that has been carried out using the Euroball and Eurogam arrays to detect {gamma} rays emitted from spontaneously fissioning {sup 248}Cm and {sup 252}Cf.

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Study of fission process and neutron

fission and properties of neutron rich nuclei hamilton j h ramayya a v

Here we present the first calculation across the nuclear chart of axial symmetry breaking in the nuclear gs. The large excesses of neutrons over protons in heavy systems near the valley of stability, coupled with the tendency for the charge-to-mass ratio to be preserved in the fission process, results in fission fragments that lie well to the neutron-rich side of stability. This renaissance in fission-fragment spectroscopy has been due primarily to the much increased resolving power of large arrays of germanium {gamma}-ray detectors such as Euroball and Gammasphere. These nuclei show a smooth evolution from axial symmetry in Y to maximum triaxiality in Rh. These data provide new insights into the changing structures at higher spins of many neutron-rich nuclei and the fission process. Important insight into the symmetry properties of the nuclear ground-state gs shape is obtained from the characteristics of low-lying collective energy-level spectra. C69, 041305 4 pages 2004.

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JOSEPH H. HAMILTON

fission and properties of neutron rich nuclei hamilton j h ramayya a v

Levels in several nuclei were observed for the full time. Configurations and spin-parity were assigned to the ground level, low-lying levels, and rotational bandheads of the two Nb isotopes. The shape coexistence effects and the competition between rotationally aligned neutron and proton bands is discussed. New band structures were found in several odd-A Y, Nb, Tc, and Rh nuclei. Later, a hexadecapole component of the gs shape was identified. A rotational band was observed for the first time in Nb-106 by means of gamma-gamma-gamma and gamma-gamma-gamma-gamma measurements of prompt fission gamma rays from Cf-252 by using the Gammasphere multidetector array. In the 1970-1995 time frame, a consensus that reflection symmetry of the gs shape was broken for some nuclei emerged.

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(PDF) Triaxiality in Neutron

fission and properties of neutron rich nuclei hamilton j h ramayya a v

The gamma band staggering in 108,110,112Ru will be discussed. Through the improved detection efficiency and high granularity, these arrays have made it possible to obtain reasonable rates for the detection of three coincident {gamma} rays out of the cascades of multiplicity ten that are typically produced in spontaneous fission. The relative yield matrix for the Ba-Mo and Ba- α-Zr charge splits was determined using an improved analysis. Garland Professor of Physics, Vanderbilt Univ. C67, 014317 6 pages 2003. The same spin-parity and configuration were assigned to the analogous band in Nb-104. The excitation energy of the primary fragments produced at scission results in the evaporation of neutrons Fig 1 to produce secondary fragments whose excitation energy is dissipated through {gamma}-ray emission.

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Information on neutron

fission and properties of neutron rich nuclei hamilton j h ramayya a v

Particle plus triaxial rotor calculations have been made for these odd-A nuclei. Moreover, we find that, for those nuclei where axial asymmetry is found, a systematic deviation between calculated and measured masses is removed. . The paper focuses on three sub-areas of current activity, namely, the measurement of yields of secondary fragment pairs, the measurement of state lifetimes at around spin 10, and recent measurements of g-factors of excited states in fission fragments. Much data remains to be analyzed. Donangelo, Third International Conference on Fission and Properties of Neutron-Rich Nuclei, J. Hamilton for his many contributions to nuclear physics.

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Study of fission process and neutron

fission and properties of neutron rich nuclei hamilton j h ramayya a v

C68, 034330 8 pages 2003. New, higher spin states were observed in many nuclei, up to 16{sup +} in some of the heavy partners. These proceedings are published following the conferences every four to five years since 1997. Comparing the {sup 252}Cf and {sup 242}Pu data allowed unique placements of many transitions. An upper limit for the second mode of 0.

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Study of fission process and neutron

fission and properties of neutron rich nuclei hamilton j h ramayya a v

C69, 024315 15 pages 2004. Garland Distinguished Professor of Physics, Vanderbilt Univ. Studies of the fission process included measured relative branchings to the 1n to 6n channels. C69, 057301 4 pages 2004. Spontaneous fission provides a very natural production mechanism for neutron-rich nuclei. With our high statistics, {gamma}-{gamma}-{gamma} coincidences where the two gates are on transitions in the two partner fragments were extracted. C67, 014317 6 pages 2003.

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