Beta decay transition probability

The parameter ajK may also be deduced from the intermediate-coupling calculations of reduced width, beta-decay lifetime, and M1 transition probability given by Lane . Of these quantities the reduced width is most sensitive to... 

No levels of the proton-unstable nucleus are known. levels are obtained from the (dp), (den) and (hol) reactions. The beta decay of to the 0 ground state is first forbidden, but transitions to the 7.12 and 6.14 MeV negative parity states are allowed, and the subsequent gamma radiation has been detected. The spin of is therefore probably 2". The isotopic spin allowed transition between the 7.12 and 6.14 MeV levels was not observed and the difference in intensity between the beta-spectrum components and the subsequent radiations is attributed to experimental uncertainties in the measurement of the former. 

The beta decay of is a simple allowed (unfavoured) transition to the 2 excited state of Ne o at I.63 MeV again it is not clear why the equivalent ground state transition does not take place, but the reason probably lies in the particular configurations. Thus if the F o and Ne states were described by a particularly complex set of configurations while the Ne ground state was simply s, the results might be explained. The Na o decay may contain a weak superallowed component to the first T — i level of Ne . 

The nuclide SP was found by Lindner in the spallation products of chlorine bombarded by high energy protons and by Turkevich and Samuels in neutron irradiated quartz. The beta decay energy is found to be about 100 keV, and the lifetime about 700 years. This locates the lowest T — 2 level of at an excitation of 11.23 MeV. The decay is probably to the ground state of P transition... 

The shell model of deformed nuclei was verified for hundreds of nuclei and proved to be very successful. It can account for level schemes, moments, electromagnetic transition probabilities, single-particle transfer reactions, beta-decay properties, etc. in the deformed regions (A a 25, 150 < A < 190, A > 220). 

The nucleus K is unstable with respect to decay into both its even-even isobars. Because of its high spin the corresponding beta transitions are highly forbidden, and the lifetime is 14.6 X 10 yr. The transition is to the ground state of Ca and the electron capture transition to the first excited state (probably... 

It is common for the number of gamma-rays emitted by a nuclide to be referred to as the abundance , sometimes as the yield . Both of these terms lack precision. Historically, confusion was often caused because an author or data source would quote abundances that were effectively beta transition data - the 93.5 % figure quoted above. In fact, the proportion of decays that give rise to 661.7 keV gamma-rays in the example above is 85.1 % when internal conversion is taken into account. In this text, I will use the term gamma emission probability on the basis that it says exactly what it means - the probability that a gamma-ray will be emitted, aU other factors being taken into account. 

The °Co square would be blue for (3 and contains the half-life, the major maximum beta energies in MeV (useful for bremsstrahlung estimation), major gamma energy (in keV) in order of emission probability and the thermal neutron cross-section. The isomer is shown as a white section with decay mode(s) and energies. On this particular chart, electron capture is shown as 8, isomeric transition as I and conversion electron emission as e , along with standard symbols. 

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