On the Positive Parity States of ¹⁹F

The calculation of rotation particle coupling has been done for the low-lying and positive parity states of ¹⁹F. The level orders attributed to the K=1/2 and 3/2 bands are computed, in which the moments of inertia are chosen as different values. The level energies up to about 5 MeV excitation can be fitted with the observed levels more satisfactory than others

Identification of Charged Particles by Multiplying Circuit

A pulse multiplying circuit for charged particle identification according to (E+E₀+k·dE/dx)×dE/dx E₀, k : const was made, in which a squaring circuit using eighteen diodes was devised. The E and dE/dx pulses, due to the incidence of charged particles, were given by a semiconductor detector and a proportional counter of gas flow type, respectively. The charged particles of low energies from D+d, T+d, Li+d and Be+d nuclear reactions were sorted by this circuit. A test for carbon ions was also done. The apparent separation ratios were as follows : ρ : τ : α : C≈1 : 2 : 9 : 6

Shift Energies of Characteristic X-rays and Auger Electrons for Ionized Atoms

Shift energies of characteristic X-rays and Auger electrons for several ionized atoms of Z＝6～17 have been computed as a function of the degree of ionization, taking Larkins' Hartree-Fock-Slater calculations for neon (Z＝10) and argon (Z＝18) as standards. A reasonable agreement is seen with the observed shift energies of X-rays for multiply ionized aluminium

Crystal Spectroscopy for Kα X-rays from Silicon Bombarded with Protons and Alpha Particles

An automated Bragg spectrometer in which an organic electron multiplier is employed as an X-ray detector has been designed, and the Kₐ diagram and satellite X-rays from silicon bombarded with hydrogen and helium ions at MeV energies have been analyzed. The procedures of deriving the ionization cross sections from the satellite intensities are described. The multiple KL" ionization cross sections are compared with the theoretical binomial distribution, which means a statistical superposition of single ionizations

Charge Transfer Cross Sections for Multiply Charged Slow Ne, Ar, Kr and Xe Ions on Various Gas Targets : I. Rare Gas Targets

Observed charge transfer cross sections are compiled in an energy region from a few to tens keV for multiply charged Ne, Ar, Kr and Xe ions on rare gas targets, where projectile ions are produced by using an “ion-impact ion source” (IIIS). The values are compared with the results of other research workers

New Accelerating Tube for 4 MV Van de Graaff Accelerator

The accelerating tube with diametrically magnetized ring magnets for the bending of backstreaming electrons was constructed for the 4 MV Van de Graaff accelerator of Kyoto University. The X-ray yield due to the electron loading was reduced to a factor of about 100 ; and the ion beam current was increased by a factor of about five compared with that of the old tube which had plane electrodes with small accelerating apertures. Characteristics of evacuation, beam convergence and accelerator operation are described ; and typical results of ion analysis are given for hydrogen, helium, nitrogen, neon and argon

Charge Transfer Cross Sections for Multiply Charged Slow Ne, Ar, Kr and Xe Ions on Various Gas Targets : II. Molecular Gas Targets

Observed charge transfer cross sections are compiled, similarly to Part I, for multiply charged Ne, Ar, Kr and Xe ions on several molecular targets in an energy region from a few to tens keV. The projectiles are recoil ions produced by using our “ion-impact ion source” (IIIS). The values are compared with the results of other research workers