Coupled channel calculations were carried out for the inelastic scattering of 13C on 24Mg using f... more Coupled channel calculations were carried out for the inelastic scattering of 13C on 24Mg using form factors generated in a single folding model. We studied the population probability P1 for 24Mg in the 1.37 MeV 2+ level with |m|=1 and 13C in its ground state. Using spin-independent potentials the excitation of various states in 13C gave rise to a maximum P1(6°) of 0.2%. This increased to 0.3% when spin-dependence was allowed for in an approximate manner. At 10° the calculations fell significantly short of the experimental data. Large polarizations were found when excited states of 13C were populated; these effects are discussed. NUCLEAR REACTIONS 13C+24Mg inelastic scattering, E=35 MeV; coupled channel study of |m|=1 population probability for the 24Mg 1.37 MeV 2+ level and polarization phenomena.
In this work we calculate the lifetime of quarkonium moving with velocity v through a quark gluon... more In this work we calculate the lifetime of quarkonium moving with velocity v through a quark gluon plasma at temperature T. We also investigate the stability of heavy mesons with respect to the effects of color charge screening. An explicit, configuration-space potential is found for the screened interaction between the quarks constituting the meson. We solve the Schrödinger equation for the relative motion of the quarks in this non-spherical potential. In this way, we determine the range of v, T values for which the meson is bound. When a bound state exists, we use the bound-state wavefunction as the initial state for the dissociation of the meson due to gluon absorption. The meson lifetime is thus determined as a function of v and T , and conclusions are drawn concerning the possibility of detection of the meson in a high-energy heavy-nucleus collision.
We use a scanning SQUID susceptometer to measure locally the temperature dependence of the penetr... more We use a scanning SQUID susceptometer to measure locally the temperature dependence of the penetration depth of the superconductor LaFePO. We observe a linear temperature dependence down to 850 mK, with a slope that varies with position on the sample. This is in contrast to ...
The 120Sn(p,t)118Sn reaction has been studied in a high-resolution experiment at an incident ener... more The 120Sn(p,t)118Sn reaction has been studied in a high-resolution experiment at an incident energy of 21 MeV. Differential cross-sections for 37 transitions to levels of 118Sn up to an excitation energy of about 3.6 MeV have been measured. Cluster and microscopic DWBA analysis and shell model calculations have been carried out.
We use the spectrum of {42}Sc as input to calculate wave functions and energy levels of all nucle... more We use the spectrum of {42}Sc as input to calculate wave functions and energy levels of all nuclei in the single-j-shell model with j equal to f_{7/2}. The value of these results for educational purposes is pointed out. Also new insights emerge. For example, it is noted that for the (Z=4,N=4) nucleus {48}Cr, a good quantum number comes out: (-1)^{(v_p+v_n)/2}, where v_p and v_n are the seniority quantum numbers of the protons and neutrons, respectively.
Coupled channel calculations were carried out for the inelastic scattering of 13C on 24Mg using f... more Coupled channel calculations were carried out for the inelastic scattering of 13C on 24Mg using form factors generated in a single folding model. We studied the population probability P1 for 24Mg in the 1.37 MeV 2+ level with |m|=1 and 13C in its ground state. Using spin-independent potentials the excitation of various states in 13C gave rise to a maximum P1(6°) of 0.2%. This increased to 0.3% when spin-dependence was allowed for in an approximate manner. At 10° the calculations fell significantly short of the experimental data. Large polarizations were found when excited states of 13C were populated; these effects are discussed. NUCLEAR REACTIONS 13C+24Mg inelastic scattering, E=35 MeV; coupled channel study of |m|=1 population probability for the 24Mg 1.37 MeV 2+ level and polarization phenomena.
In this work we calculate the lifetime of quarkonium moving with velocity v through a quark gluon... more In this work we calculate the lifetime of quarkonium moving with velocity v through a quark gluon plasma at temperature T. We also investigate the stability of heavy mesons with respect to the effects of color charge screening. An explicit, configuration-space potential is found for the screened interaction between the quarks constituting the meson. We solve the Schrödinger equation for the relative motion of the quarks in this non-spherical potential. In this way, we determine the range of v, T values for which the meson is bound. When a bound state exists, we use the bound-state wavefunction as the initial state for the dissociation of the meson due to gluon absorption. The meson lifetime is thus determined as a function of v and T , and conclusions are drawn concerning the possibility of detection of the meson in a high-energy heavy-nucleus collision.
We use a scanning SQUID susceptometer to measure locally the temperature dependence of the penetr... more We use a scanning SQUID susceptometer to measure locally the temperature dependence of the penetration depth of the superconductor LaFePO. We observe a linear temperature dependence down to 850 mK, with a slope that varies with position on the sample. This is in contrast to ...
The 120Sn(p,t)118Sn reaction has been studied in a high-resolution experiment at an incident ener... more The 120Sn(p,t)118Sn reaction has been studied in a high-resolution experiment at an incident energy of 21 MeV. Differential cross-sections for 37 transitions to levels of 118Sn up to an excitation energy of about 3.6 MeV have been measured. Cluster and microscopic DWBA analysis and shell model calculations have been carried out.
We use the spectrum of {42}Sc as input to calculate wave functions and energy levels of all nucle... more We use the spectrum of {42}Sc as input to calculate wave functions and energy levels of all nuclei in the single-j-shell model with j equal to f_{7/2}. The value of these results for educational purposes is pointed out. Also new insights emerge. For example, it is noted that for the (Z=4,N=4) nucleus {48}Cr, a good quantum number comes out: (-1)^{(v_p+v_n)/2}, where v_p and v_n are the seniority quantum numbers of the protons and neutrons, respectively.
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Papers by B. Bayman