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U.S. Department of Energy
Office of Scientific and Technical Information

PROGRESS REPORT FOR OCTOBER, NOVEMBER, DECEMBER 1958 TO THE UNITED STATES ATOMIC ENERGY COMMISSION

Technical Report ·
OSTI ID:4233456
Neutron resonance levels in As were obtained using self-detection techniques and transmission measurements. The large, flat detector using the B/ sup 10/(n, alpha ) reaction was successfully operated with the NEVIS velocity spectrometer. The differential cross sections for neutrons elastically scattered from He/sup 3/ are given for energies of 2.6, 5.0, 8.0, and 17.5 Mev. He/sup 3/ (n,p) and He/sup 3/(n,d) cross sections are also given. Preliminary measurements of neutron total cross sections for Pu/sup 239/ U/sup 233/, and U/sup 235/ at0 a 0.1 ev are plotted. A search was made for the double gamma emission predicted in the 0/sup +/-0/sup +/ ground state transition from the 3.35 Mcv state Of Ca/ sup 40/ excited by proton bombardment. An upper limit of 1:1 was placed on the gamma - gamma / pi ratio. A rule was developed for obtaining the relativistic corrections to beta decay spectra from formula for the first forbidden transitions. Measurements of the circular polarization of gamma rays following beta decay were used a determine the longitudinal polarization of electrons from the decay. (For preceding period see CU-178.) (D.E.B.)
Research Organization:
Columbia Univ., N.Y. Pupin Cyclotron Lab.; Columbia Univ., N.Y. George B. Pegram Lab.
NSA Number:
NSA-13-016290
OSTI ID:
4233456
Report Number(s):
CU-184
Country of Publication:
United States
Language:
English