An intrinsic spin for interacting bosons

The addition, to the usual set of T=1 bosons, of s and d bosons with T=0 and an intrinsic spin of S=1 leads to a version of the IBM which incorporates the Wigner supermultiplet symmetry.     

Six bits for nine colored quarks

The hypercomplex number system of the Dirac equation is used to generalizeSU(2) to the covering group ofSO(4). The basic representations in this number language suggest a parton model of 6 “bits” and 6 “antibits”; one with spin 0, two with spin 1/2, and three with spin 1. The relationship of this to the special relativity group is also considered.     

An electromagnetic,plane stress-wave generator

This paper describes a unique device that has been developed for the transient loading of models along straight and curved boundaries and that operates by discharge of a high-energy, high-voltage capacitor bank. In its present configuration, this device can generate uniform pressures from 1500 psi (10 MPa) to pressures that approach 100,000 psi (690 MPa) and that rise from zero to maximum pressure in 2 μs and decay to approximately zero in another 2 μs. The transient stress-wave patterns in photoelastic models loaded with this device have been recorded by a dynamic polariscope. The dynamic polariscope presently in use is identical to a static polariscope except that the light source is of a short enough duration (½ μs) to photographically stop the movement of the photoelastic-fringe patterns caused by the stress wave. With the stress-wave generator and the dynamic polariscope, transient photoelastic patterns have been recorded in a number of models. These patterns indicate that the scatter from duplicate shots performed with this technique is on the order of 3 percent. This represents considerable improvement over the 15-percent scatter normally experienced with sheet-explosive loading techniques. This improvement and the rapid turnaround between shots (approximately 5 min) are distinct advantages this system has over other methods of dynamic loading.     

Synthesis and development of porous chelating polymers for the decontamination of nuclear waste

The alkaline synthesis of porous phenol-formaldehyde polymers containing iminodiacetic acid is described. Porosity is induced by the addition of a finely divided solid material (template) that is insoluble under the reaction conditions. This template is removed by dissolution after the polymerization is complete. Silica gel, carbonate salts and various other salts are used as templates. Resins containing different phenols are synthesized and their effectiveness for the removal of radioactive cesium and strontium from alkaline concentrated sodium salt brines is examined. This matrix typifies the composition of soluble defense nuclear waste.This paper was prepared in connection with work done under Contract No. DE-AC09-76SR00001 with the U.S. Department of Energy.     

The Mori formalism,a critical discussion of its use in representing far infrared and microwave absorptions

The three variable Mori formalism for molecular dynamics in the fluid state is evaluated using some extensive data of Gerschel's on three strongly dipolar symmetric tops in the microwave and far infrared region of the electromagnetic spectrum. It is found that the use of loss and power absorption coefficients can lead to misleading results when theory and experiment are compared and it is essential in general to get the data over the whole frequency range of interest. Using this procedure it is found that the second memory function of the Mori continued fraction is difficult to approximate satisfactorily with a simple decay (such as an exponential) and it is unlikely that successive memory functions of the total orientational correlation function are simpler functions of time than the latter.     

FLASH PHOTOLYSIS OF N-ACETYL-L-TRYPTOPHANAMIDE: ANALYSIS OF TRANSIENTS EMPLOYING VIDICON TUBE DETECTION*

Abstract— An improved method for recording transient absorption spectra obtained by flash photolysis is described. The detection system, comprising a vidicon tube coupled to a multichannel analyzer, is shown to permit the rapid acquisition of accurate and precise spectra spanning any 360 nm interval within the 200 to 1100 nm wavelength range. The successful dissection of the complex spectrum obtained when N-acetyl-L-tryptophanamide is flashed under nitrogen-saturated conditions is utilized to highlight the capabilities of the detection system. This analysis suggests that the observed radicals must originate, in part, from an oxygen sensitive long-lived precursor which is not the triplet state.