1. The only valid (necessary and sufficient) condition for -stability of a nucleus is the minimum value of the mass of the atom (not of the nucleus) on the isobar line (that is, atomic weight = const). This condition holds true for all known isotopes without exception. 2. The condition of nuclear stability and the decay schemes of unstable nuclei depend on the state of the electron shells. Ato...

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This paper presents a physical random number generator for mainly cryptographical applications based on alpha decay of Americium 241. A simple and low-cost implementation is shown to detect the decay events of a radioactive source often found in common household smoke detectors. Three different algorithms for the extraction of random bits from the exponentially distributed impulses are discusse...

The inactivation of the phages T1, T2, T3, T5, T7, and lambda by decay of incorporated P(32) has been studied. It was found that these phages fall into two classes of sensitivity to P(32) decay: at the same specific activity of P(32) in their deoxyribonucleic acid (DNA), T2 and T5 are inactivated three times as rapidly as T1, T3, T7, and lambda. Since the strains of the first class were found t...

The accuracy of radioisotopic ages is, at present, limited by the accuracy of radioactive decay constants. A literature survey reveals that decay constants used in geoand cosmochronology usually are assigned uncertainties of ca. 1% but that there are very much larger unaccounted discrepancies between decay constants reported by different “counting groups” as well as differences between results ...

The University of Texas Medical Branch (UTMB) at Galveston is a large academic medical center with about 12,700 employees, 350 radioisotope research labs and 200 permitted radioactive materials users. Consequently, UTMB generates a fairly large amount of radioactive waste. The majority of this waste contains short-lived radionuclides, such as 32P, 33P, and 35S, which are held for decay and then...

this study present several examples of using Excel spreadsheets to and simulate physical phenomena, namely projectile motion, falling motion in The air, wave function particles a one-dimensional box, nuclear radioactive decay. Spreadsheets are used analyze the projectiles with without resistance, objects different terminal velocities, graphs functions probabilities values n, i.e. n=1 n=4, decay...