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FINITE-TEMPERATURE HFB THEORY

Description: The finite-temperature Hartree-Fock-Bogoliubov (FTHFB) equations are derived. For the pairing Hamiltonian FTHFB simplifies to finite-temperature BCS (FTBCS), The solution of the FTBCS equations for the degenerate model displays a temperature-dependent pairing "phase transition."
Date: July 1, 1980
Creator: Goodman, Alan L.
Partner: UNT Libraries Government Documents Department

Nuclear Data Sheets for A = 166

Description: Nuclear structure data pertaining to all known A = 166 nuclides (Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt) have been compiled and evaluated, and incorporated into the ENSDF data file. This evaluation for A = 166 supersedes the previous publication (E.N. Shurshikov and N.V. Timofeeva, Nuclear Data Sheets 67, 45 (1992) (literature cutoff date 1 October 1990)) and the revision by C.M. Baglin of {sup 166}W (literature cutoff data 16 April 2000). It includes literature available by 1 March 2008. Subsequent to the previous evaluation, {sup 166}Gd has been observed for the first time and the first observations of excited states in {sup 166}Tb, {sup 166}Re, {sup 166}Os and {sup 166}Ir have been reported: also, knowledge of collective structure in {sup 166}Dy. {sup 166}Ho, {sup 1676}Er, {sup 166}Tm, {sup 166}Yb, {sup 166}Lu, {sup 166}Hf, and {sup 166}Ta has been considerably expanded. However, the structure suggested here for {sup 166}Re is highly tentative and a further, more detailed study of {alpha} decay into (and out of) {sup 166}Re could be informative.
Date: May 1, 2008
Creator: Baglin, Coral M.
Partner: UNT Libraries Government Documents Department

Gene Expression in the Third Dimension: The ECM-nucleus Connection

Description: Decades ago, we and others proposed that the dynamic interplay between a cell and its surrounding environment dictates cell phenotype and tissue structure. Whereas much has been discovered about the effects of extracellular matrix molecules on cell growth and tissue specific gene expression, the nuclear mechanisms through which these molecules promote these physiological events remain unknown. Using mammary epithelial cells as a model, the purpose of this review is to discuss how the extracellular matrix influences nuclear structure and function in a three-dimensional context to promote epithelial morphogenesis and function in the mammary gland.
Date: October 1, 2009
Creator: Spencer, Virginia A; Xu, Ren & Bissell, Mina
Partner: UNT Libraries Government Documents Department

Physics Division annual report 2002.

Description: This report highlights the research performed in 2002 in the Physics Division of Argonne National Laboratory. The Division's programs include operation of ATLAS as a national user facility, nuclear structure and reaction research, nuclear theory, medium energy nuclear research and accelerator research and development.
Date: September 8, 2003
Creator: Thayer, K. J.
Partner: UNT Libraries Government Documents Department

Nuclear structure studies with the inelastic neutron scattering rection and gamma-ray detection

Description: The (<i>n</i>, <i>n</i>´(gamma)) reaction has been used at the University of Kentucky accelerator facility to examine the detailed structure of a number of nuclei. The advantages of this method are reviewed, and recent developments are described. Examples of unique nuclear structure studies that have been carried out with this method are presented.
Date: December 10, 1998
Creator: Garrett, P. E.; Warr, N. & Yates, S. W.
Partner: UNT Libraries Government Documents Department

Observation of the single step links of the yrast superdeformed band in {sup 194}Pb

Description: The EUROGAM array has been used to investigate the decay out of the yrast superdeformed (SD) band in {sup 194}Pb. Eigth single step decays from the lowest observed SD states to low-lying states at normal deformation (ND) have been identified. From this observation, the excitation energy (4877 {plus_minus} 1.5 keV) and the spin (6+) of the lowest observed SD state in {sup 194}Pb are established.
Date: December 1, 1996
Creator: Hannachi, F.; Lopez-Martens, A. & Schueck, C.
Partner: UNT Libraries Government Documents Department

Nuclear Structure at the Limits

Description: One of the frontiers of today�s nuclear science is the �journey to the limits� of atomic charge and nuclear mass, of neutron-to-proton ratio, and of angular momentum. The tour to the limits is not only a quest for new, exciting phenomena, but the new data are expected, as well, to bring qualitatively new information about the fundamental properties of the nucleonic many-body system, the nature of the nuclear interaction, and nucleonic correlations at various energy-distance scales. In this series of lectures, current developments in nuclear structure at the limits are discussed from a theoretical perspective, mainly concentrating on medium-mass and heavy nuclei.
Date: January 12, 1998
Creator: Nazarewicz, W.
Partner: UNT Libraries Government Documents Department

BIBLIOGRAPHIC DATABASES IN SUPPORT OF NSDD EVALUATIONS.

Description: Bibliographic databases useful to nuclear structure and decay data (NSDD) evaluators are briefly described, along with examples of their usage. Authors' reference listings are also discussed. Nuclear Science References is recognized as the major bibliographic resource, and therefore most of the presentation is devoted to this database.
Date: April 4, 2005
Creator: BURROWS, T.
Partner: UNT Libraries Government Documents Department

ENSDF ANALYSIS AND UTILITY CODES.

Description: The ENSDF analysis and checking codes are briefly described, along with their uses with various types of ENSDF datasets. For more information on the programs see ''Read Me'' entries and other documentation associated with each code.
Date: April 4, 2005
Creator: BURROWS, T.
Partner: UNT Libraries Government Documents Department

NUCLEAR STRUCTURE AND DECAY DATA: INTRODUCTION TO RELEVANT WEB PAGES.

Description: A brief description is given of the nuclear data centers around the world able to provide access to those databases and programs of highest relevance to nuclear structure and decay data specialists. A number of Web-page addresses are also provided for the reader to inspect and investigate these data and codes for study, evaluation and calculation. These instructions are not meant to be comprehensive, but should provide the reader with a reasonable means of electronic access to the most important data sets and programs.
Date: April 4, 2005
Creator: BURROWS, T.W.; MCLAUGHLIN, P.D. & NICHOLS, A.L.
Partner: UNT Libraries Government Documents Department

Damping in Yb nuclei

Description: In a mixture of three Yb nuclei, we find the rotational damping widths vary from 180 keV at 1.1 MeV {gamma}-ray energy to 290 keV at 1.5 MeV, and the average compound damping widths (or spreading widths) vary from 40 keV at 1.1 MeV {gamma}-ray energy to 60 keV at 1.3 MeV. The simulations also suggest extensive motional narrowing.
Date: July 1, 2002
Creator: Stephens, F.S.; Deleplanque, M.A.; Lee, I.Y.; Ward, D.; Fallon, P.; Cromaz, M. et al.
Partner: UNT Libraries Government Documents Department

DOE 1994 review of nuclear physics

Description: Understanding the physics of nuclei at the limits of deformation. Superdeformed nuclei (i.e., nuclei with a major-to-minor axis ratio of {approximately}2:1) provide a unique laboratory for nuclear structure studies at the limits of observable deformation. Islands of superdeformation are predicted and found throughout the table of isotopes. We have focused our attention on the A = 190 region, since neutron deficient Hg and Pb nuclei were predicted to support a stable superdeformed minimum at zero angular momentum. We are making major contributions to the development of this region of superdeformation. We find general agreement with fully 3-D Hartree Fock calculations done with a microscopic interaction, including pairing. Our measurements test predictions in the second well which are based on extrapolation of nuclear theory determined at `normal` deformation. In addition, unusual phenomena are expected because of the large difference in shape between well I and well II states. Our experiments require the sensitivity and resolution of large scale Ge detector arrays.
Date: February 8, 1994
Creator: Becker, J.
Partner: UNT Libraries Government Documents Department