An intermediate image beta-ray spectrometer has been constructed utilizing the focusing properties of a U-shaped magnetic field distribution. The construction and performance of the instrument are discussed. A transmission of ten percent has been attained with a resolution of about six percent. A scintillation spectrometer is used in conjunction with the intermediate image spectrometer for the purpose of making coincidence measurements.
Nichols, R. T.; Pohm, A. V.; Talboy, J. H. Jr.; and Jensen, E. N., "A beta-ray spectrometer for coincidence measurements" (1953). Ames Laboratory ISC Technical Reports. 53.