Small order effects in beta decay and some decay schemes

The beta activities of K42, P32, and As 76 were examined for small order effects with a thin lens and an intermediate image spectrometer. The linearity of the spectrometers was checked by examining the unique beta spectrum of Y90;The 12:4-hour activity of K42 was found to have 2 beta groups with energies of 1.985 +/- 0.015 Mev and 3.545 +/- 0.010 Mev. The 3.54 Mev beta group was found to be a first forbidden transition with a spin change of 2 from its shape and log ft (Wo2 - 1) value. The 1.985 Mev transition was found to have essentially an allowed shape and apparently corresponds to a first forbidden transition with a zero spin change. Its allowed shape indicates that the nuclear parameters Z 3 or Y1 (7) must have values greater than 10. The possible admixture from the C2 1 term (7) is less than 10 percent. What appeared to be a very weak third beta group of 0.4 or 0.5 Mev was also found. (Abstract shortened by UMI.

Magnetometer with miniature transducer and automatic transducer scanning apparatus

Magnetometer is simple to operate and has fast response. Transducer is rugged and flat and can measure magnetic fields as close as 0.08 mm from any relatively flat surface. Magnetometer has active region of approximately 0.64 by 0.76 mm and is capable of good spatial resolution of magnetic fields as low as 0.02 Oe (1.6 A/m)

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The beta-spectra of P-32 and P-33

The beta-spectrum of P-32 has been examined with a thin-lens spectrometer. The maximum energy of the 14.3-day beta activity, as determined from several Kurie plots, was found to be 1.704 +/- 0.008 Mev. The Kurie plots gave excellent straight lines from the maximum beta-energy to about 0.26 Mev. In phosphorus samples prepared from neutron irradiated sulfur an additional beta-activity was observed having a maximum energy of 0.26 +/- 0.02 Mev and a half-life of 24.8 +/- 0.5 days. This low-energy beta-group was also observed in phosphorus samples prepared from sulfur and lithium chloride irradiated with X-rays having a maximum energy of 68 Mev. The low-energy beta-group was not observed in phosphorus samples prepared from sulfur irradiated with deuterons or phosphorus irradiated with neutrons . The low-energy beta-group is ascribed to P-33

A beta-ray spectrometer for coincidence measurements

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

Small order effects in beta decay and some decay schemes

The beta activities of K42, P32, and As 76 were examined for small order effects with a thin lens and an intermediate image spectrometer. The linearity of the spectrometers was checked by examining the unique beta spectrum of Y90;The 12:4-hour activity of K42 was found to have 2 beta groups with energies of 1.985 +/- 0.015 Mev and 3.545 +/- 0.010 Mev. The 3.54 Mev beta group was found to be a first forbidden transition with a spin change of 2 from its shape and log ft (Wo2 - 1) value. The 1.985 Mev transition was found to have essentially an allowed shape and apparently corresponds to a first forbidden transition with a zero spin change. Its allowed shape indicates that the nuclear parameters Z 3 or Y1 (7) must have values greater than 10. The possible admixture from the C2 1 term (7) is less than 10 percent. What appeared to be a very weak third beta group of 0.4 or 0.5 Mev was also found. (Abstract shortened by UMI.)</p

A beta-ray spectrometer for coincidence measurements

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.</p

Iowa Women: The Kinds of Food They Eat

What does is take to keep nutritionally fit throughout life? Are Iowa women choosing the right kinds of foods? Here's a picture of what Iowa women are eating every day and the nutritional worth of their meals.</p