Now showing items 11-20 of 66
Neutron total cross sections on protons and nuclei in the 10 to 30 GeV/c momentum range
(Elsevier, 1971-10-04)
We present the results of a recent AGS measurement of the total cross section for neutrons on protons, deuterons and other nuclei in the momentum range 10 to 30 GeV/c. The standard good-geometry transmission technique was ...
Calculation of Photon‐Absorption Coefficient in Laser‐Produced Hydrogen Plasmas
(The American Institute of Physics, 1971-12)
The absorption coefficient for ruby‐laser photons in laser‐produced hydrogen plasmas is calculated for temperatures up to 5×105°K using second‐order perturbation theory. The calculations include inverse bremsstrahlung in ...
Difficulty with a kinematic concept of unstable particles: the SZ.-Nagy extension and the Matthews-Salam-Zwanziger representation
(Springer-Verlag, 1971-12)
We discuss the possibility of describing unstable systems, or dissipative systems in general, by vectors in a Hilbert space, evolving in time according to some non-unitary group or semigroup of translations. If the states ...
Neutron-proton elastic scattering from 5 to 30 GeV/c
(Elsevier, 1971-07-01)
The differential cross section for neutron-proton elastic scattering was measured in the diffraction region with incident neutron momenta between 5 and 30 GeV/c. The experiment was an optical-spark-chamber-counter experiment ...
Electric Field Gradients at 57Fe in ZnFe2O4 and CdFe2O4
(The American Institute of Physics, 1971-12-01)
The nuclear quadrupole coupling constants and isomer shifts of 57Fe in the spinels ZnFe2O4 and CdFe2O4 were measured using the Mössbauer effect. The signs of the quadrupole coupling constants were determined from spectra ...
Temperature dependence of ionization rates in AlxGa1-xAs
(Elsevier, 1971-07)
The ionization rates in AlxGa1-xAs have been measured in a temperature range from 77[deg]K to 373[deg]K for samples with various Al content. The results showed that the ionization rates decrease with both the Al content ...
Experimental and calculated photopeak efficiencies for a coaxial Ge(Li) detector
(Elsevier, 1971-05-15)
Experimental and calculated photopeak efficiencies have been obtained for a 32 cm3 true coaxial Ge(Li) detector at four distances: 2 cm, 5 cm, 10 cm and 20 cm. A comparison of these results is presented.
Isopin invariance in the reaction np --> [pi]0d
(Elsevier, 1971-10-01)
A measurement of the differential cross section for the reaction np--> [pi]0d has been made at the Lawrence Radiation Laboratory 184-inch cyclotron. A neutron beam with kinetic energies up to 720 MeV was incident on a ...
Microwave Spectrum, Structure, and Dipole Moment of Difluorophosphine Borane
(The American Institute of Physics, 1971-03-01)
The structure of difluorophosphine borane (HF2P☒BH3) has been determined from the microwave spectra of six isotopic species. The expected staggered conformation and CsCs symmetry have been confirmed. The structural parameters ...
Calculation of the Zero Wave Vector Lattice Frequencies of Alpha‐ and Beta‐Oxygen
(The American Institute of Physics, 1971-08-01)
The optically active lattice frequencies of α‐ and β‐O2 have been calculated in the rigid‐molecule approximation using an atom–atom Lennard‐Jones [6–12] potential, with and without the addition of an intermolecular ...