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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Intermediate Mass Fragment Emission As A Probe Of Nuclear Dynamics, D. R. Bowman, C. M. Mader, Graham F. Peaslee, W. Bauer, N. Carlin, R. T. De Souza, C. K. Gelbke, W. G. Gong, Y. D. Kim, M. A. Lisa, W. G. Lynch, L. Phair, M. B. Tsang, C. Williams, N. Colonna, K. Hanold, M. A. Mcmahan, G. J. Wozniak, L. G. Moretto, W. A. Friedman
Intermediate Mass Fragment Emission As A Probe Of Nuclear Dynamics, D. R. Bowman, C. M. Mader, Graham F. Peaslee, W. Bauer, N. Carlin, R. T. De Souza, C. K. Gelbke, W. G. Gong, Y. D. Kim, M. A. Lisa, W. G. Lynch, L. Phair, M. B. Tsang, C. Williams, N. Colonna, K. Hanold, M. A. Mcmahan, G. J. Wozniak, L. G. Moretto, W. A. Friedman
Faculty Publications
Element distributions and fragment multiplicity distributions have been measured for E/A=50 MeV Xe129+12C, Al27, V51, Cunat, Y89, and Au197 reactions using a low threshold 4π detector. Both distributions show a strong correlation with the detected charged particle multiplicity and a large degree of target independence. The measured distributions are compared with hybrid model calculations which incorporate important dynamical aspects in both the preequilibrium and statistical emission phases. Results of these calculations are in reasonable agreement with the data. However, uncertainties with regard to the compressibility of nuclear matter remain due to uncertainties in the coupling of the two models.
Impact Parameter Filters For 36ar + 197au Collisions At E/A = 50, 80 And 110 Mev, L. Phair, D. R. Bowman, C. K. Gelbke, W. G. Gong, Y. D. Kim, M. A. Lisa, W. G. Lynch, Graham F. Peaslee, R. T. De Souza, M. B. Tsang, F. Zhu
Impact Parameter Filters For 36ar + 197au Collisions At E/A = 50, 80 And 110 Mev, L. Phair, D. R. Bowman, C. K. Gelbke, W. G. Gong, Y. D. Kim, M. A. Lisa, W. G. Lynch, Graham F. Peaslee, R. T. De Souza, M. B. Tsang, F. Zhu
Faculty Publications
Collisions between 36Ar projectiles and 197Au target nuclei at have been studied with the MSU Miniball, a 4π phoswich array with a low detection threshold. Various impact-parameter filters, based upon total charged-particle multiplicity, transverse energy, midrapidity charge and multiplicity of emitted hydrogen nuclei, are compared and cross-correlated. The relative selectivity of each prescription for small impact-parameter collisions is evaluated by assessing the suppression of fast-particle emission at forward angles.
Fluctuations In Multifragment Decays, L. Phair, M. A. Lisa, D. R. Bowman, C. K. Gelbke, W. G. Gong, Y. D. Kim, W. G. Lynch, Graham F. Peaslee, H. Schulz, R. T. De Souza, M. B. Tsang, F. Zhu
Fluctuations In Multifragment Decays, L. Phair, M. A. Lisa, D. R. Bowman, C. K. Gelbke, W. G. Gong, Y. D. Kim, W. G. Lynch, Graham F. Peaslee, H. Schulz, R. T. De Souza, M. B. Tsang, F. Zhu
Faculty Publications
An analysis of charged particle distributions is performed to search for large fluctuations and signals of intermittency in reactions at E/A=35–110 MeV. When the effects of impact-parameter averaging are reduced by appropriate cuts on the total transverse energy, charged particle multiplicity distributions narrower than Poisson distributions are observed. Such distributions are inconsistent with intermittency signals of non-trivial origin.
Multifragment Emission In 36ar + 197au And 129xe + 197au Collisions: Percolation Model, L. Phair, W. Bauer, D. R. Bowman, N. Carlin, R. T. De Souza, C. K. Gelbke, W. G. Gong, Y. D. Kim, M. A. Lisa, W. G. Lynch, Graham F. Peaslee, M. B. Tsang, C. Williams, F. Zhu, N. Colonna, K. Hanold, M. A. Mcmahan, G. J. Wozniak, L. G. Moretto
Multifragment Emission In 36ar + 197au And 129xe + 197au Collisions: Percolation Model, L. Phair, W. Bauer, D. R. Bowman, N. Carlin, R. T. De Souza, C. K. Gelbke, W. G. Gong, Y. D. Kim, M. A. Lisa, W. G. Lynch, Graham F. Peaslee, M. B. Tsang, C. Williams, F. Zhu, N. Colonna, K. Hanold, M. A. Mcmahan, G. J. Wozniak, L. G. Moretto
Faculty Publications
Relative abundances of intermediate mass fragments and light particles measured for 36Ar+197Au collisions at lie within the range of percolation model predictions, but for129Xe+197Au collisions at , the percolation model predicts too small admixtures of intermediate mass fragments among the emitted charged particles.
A Modular Array To Detect Complex Fragments Produced In Intermediate-Energy Reverse-Kinematics Reactions, W. L. Kehoe, A. C. Mignerey, A. Moroni, I. Iori, Graham F. Peaslee, N. Colonna, K. Hanold, K. Hanold, D. R. Bowman, L. G. Moretto, M. A. Mcmahan, J. T. Walton, G. J. Wozniak
A Modular Array To Detect Complex Fragments Produced In Intermediate-Energy Reverse-Kinematics Reactions, W. L. Kehoe, A. C. Mignerey, A. Moroni, I. Iori, Graham F. Peaslee, N. Colonna, K. Hanold, K. Hanold, D. R. Bowman, L. G. Moretto, M. A. Mcmahan, J. T. Walton, G. J. Wozniak
Faculty Publications
A segmented silicon-silicon-plastic array was constructed for studying complex fragment production in heavy-ion reactions with incident energies of 35–100 MeV/u. The array was designed: (1) to measure the energy, position and charge of fragments with 1≤Z≤Zproj; (2) to have high efficiency for detecting fragments produced in reverse-kinematics reactions; (3) to detect events with two or more fragments; and (4) to have a flexible configuration. Each array telescope consists of a 300 μm Si detector, a 5 mm Si(Li) detector and a 7.6 cm plastic scintillator. The elements of the telescope are held by interconnecting modular packages which allow the telescopes …