PROGRESS REPORT FOR JULY, AUGUST, SEPTEMBER 1958

Technical Report · Sat Oct 31 04:00:00 EST 1959

OSTI ID:4252576

Neutron Physics. Nevis neutron velocity spectrometer results on Ta and Ag are given and discussed. Data are also given on resonance levels in U/sup 235/ , Experiments to improve rcsolution for detection of neutrons by the 477 kev ray from B/sup 10/.(n, alpha )Li/sup 7/ are described. Further study of the N/sup 14/ (n,p) cross section is reported. Testing of the He/sup 3/ proportional counter in measuring cross sections is described. Improvements in the neutron crystal spectrometer at BNL were made. Charged Particle Investigations, Replacement of 3 1/8-in. r-f power transmission lines of the cyclotron with 6-in. lines is reported. Studies are reported on: Ni( alpha , alpha p) correlation, / reaction. Basic design of the Van de Graaff 48-in. scattering-correlation chamber was made. Theoretical Investigations, Study of higher order corrections to allowed beta decay is reported. Instrument Development, Brief reports are given of work on: 2000-channel time-of-flight analyzer, multiplier phototube blanking pulser, high input impedance transistor linear amplifier, overload protective circuit for transistor-regulated power supply, and a 40-amp transistor magnet current regulator. Light Particle Investigations, A Gerholm-type coincidence beta spectrometer is described. A re-investigation of circular polarization of bremsstrahlung from Sr/sup 90/-Y/sup 90 electrons was made. Studies are also reported on electron-capture bremsstrahlung in Cs/sup 131/, O/sup 15/ ft value, ratio of Gamow-Teller and Fermi coupling constants, and He/sup 6/ beta recoil. (For preceding period see CU176.) (T.R.X)

• Research Organization: Columbia Univ., New York. Pupin Cyclotron Lab.; Columbia Univ., New York. George B. Pegram Lab.
• NSA Number: NSA-13-013702
• OSTI ID: 4252576
• Report Number(s): CU-178
• Country of Publication: United States
• Language: English

Related Subjects

ALPHA PARTICLES-- BORON 10-- CROSS SECTIONS-- DETECTION-- ENERGY LEVELS-- HELIUM 3-- KEV RANGE-- LITHIUM 7-- MEASURED VALUES-- NEUTRON SPECTROMETERS-- NEUTRONS-- NITROGEN 14-- NUCLEAR REACTIONS-- PROPORTIONAL COUNTERS-- PROTONS-- RESOLUTION-- RESONANCE-- SILVER-- TANTALUM-- TESTING-- URANIUM 235-- VELOCITY
ALPHA PARTICLES-- CHARGED PARTICLES-- CYCLOTRONS-- FREQUENCY-- GAMMA RADIATION-- NEON 20-- NEUTRONS-- NICKEL-- NUCLEAR REACTIONS-- PLANNING-- PROTONS-- RADIATION DETECTORS-- RADIO WAVES-- SCATTERING-- SODIUM 21-- VAN DE GRAAFF ACCELERATORS
AMPLIFIERS-- CIRCUITS-- CONTROL SYSTEMS-- CURRENTS-- INSTRUMENTS-- MAGNETS-- NEUTRON SPECTROMETERS--
PHYSICS AND MATHEMATICS