Nuclear reactions predicting mode

There are four stable isotopes of iron with mass numbers 54, 56, 57, and 58. There are also two radioactive isotopes iron-53 and iron-59. Predict modes of decay for these two isotopes and write a nuclear reaction for each. (See Table 21.2.)... 

In the preceding section we have described three methods of determining nuclear spin — one optical and two magnetic. The nuclear spin plays a central role in forming the nuclear energy states. It is therefore to be expected that it also should be of importance in nuclear reactions and in radioactive decay. Let us consider some rules for the lifetimes of unstable nuclei, for their permitted modes of decay, and for the role of nuclear spin. Knowing these rules, it is, for example, possible from a decay scheme to predict the spin states of levels which have not been measured. 

Turning to pathway c), the concerted-reaction mechanism, we have formulated two approaches to predicting the rate constant, a double-adiabatic and a two-dimensional approach (4,5). In the double-adiabatic theory, the electron is considered to be coupled to two nuclear modes, a solvent (orientational polarization) mode that is treated classically in view of its low... 

New forms of radioactivity were reported. Proton emission from ground states, predicted as the simplest decay mode of proton-rich nuclei and long searched for, was observed in 1982 for Lu (81 ms) produced by a heavy-ion reaction (Hofinann et al. 1982). Unusual large nuclear radii were found for some very light nuclei (Tanihata et al. 1985) and later attributed to neutron haloes, e.g., for Li (8.5 ms) to a halo of two neutrons around a i core. Even a new kind of natural radioactivity was discovered in 1984 (Rose and Jones 1984) emission of nuclei fi-om Ra (lid) leading to Discoveries of other rare decay modes involving the emission of a variety of fragments from very heavy nuclei soon followed. 

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