Development of odd-Z-projectile reactions for transactinide element synthesis (open access)

Development of odd-Z-projectile reactions for transactinide element synthesis

The development of new odd-Z-projectile reactions leading to the production of transactinide elements is described. The cross section of the even-Z-projectile 208Pb(64Ni, n)271Ds reaction was measured at two new energies using the Berkeley Gas-filled Separator at the Lawrence Berkeley National Laboratory 88-Inch Cyclotron. In total, seven decay chains attributable to 271Ds were observed. These data, combined with previous results, establish an excitation function for the production of 271Ds. The maximum cross section was 20 +15 -11 pb at a center-of-target energy of 311.5 MeV in the laboratory frame.The data from the 271Ds experiments were used to estimate the optimum beam energy for the new odd-Z-projectile 208Pb(65Cu, n)272-111 reaction using the Fusion by Diffusion theory proposed by Swiatecki, Siwek-Wilczynska, and Wilczynski. A cross section for this reaction was measured for the first time, at a center-of-target energy of 321.1 MeV in the laboratory frame. The excitation energy f or compound nuclei formed at the target center was 13.2 MeV. One decay chain was observed, resulting in a measured cross section of 1.7 +3.9 -1.4 pb. This decay chain is in good agreement with previously published data on the decay of 272-111.The new odd-Z-projectile 208Pb(55Mn, n)262Bh reaction was studied at three different …
Date: November 4, 2004
Creator: Folden III, Charles Marvin
System: The UNT Digital Library
The Indiana Fine Arts Diagnostic Achievement Tests (open access)

The Indiana Fine Arts Diagnostic Achievement Tests

A document on the Indiana Fine Arts Diagnostic Achievement Tests, The Getty Center for Education in the Arts Student Assessment Meeting. The Indiana Fine Arts Diagnostic Achievement Testing program began in 1987 as a means to provide art teachers with new tools from which to measure student achievement in visual arts, music, theatre/creative drama and dance/creative movement. The purpose of the testing program is also to create / develop new tools to diagnose student and class strengths or needs.
Date: [1989-11-04,1989-11-06]
Creator: Patchen, Jeffrey H.
System: The UNT Digital Library