The Theory of Controlled Radiative Gamma Decay

The problem becomes very complicated v hen material bodies exist in the surrounding space. In this case, an adequate solution requires to consider simultaneously at least four systems—the quantum one (the excited nucleus) the electrons of the atom, v/hich contains the excited nucleus the ensemble of electromagnetic modes in the main (vacuum, zero-energy) state interacting v/ith the nucleus and the ensemble of objects surrounding the considered nucleus (the system of N resonant or nonresonant atoms or screen) v/ith v/hich these modes also interact 

In gamma range, where very little intermode distance makes the spectrum of modes a quasicontinuous one, such an approach is fundamentally impossible. 

Due to the lack of a corresponding theory, in order to make predictions about the character of spontaneous gamma decay of excited nuclei both in the matrix volume and being surrounded by different screens (resonant or nonresonant), it is in fact always supposed without any grounding, that this decay will have essentially the same characteristics as for the excited nucleus in free space. 

The lack of a consistent solution of the general spontaneous decay problem with existence of a system of nonexcited atoms (screen) near the excited nucleus (including the case of large distance L A.) leaves open the question of the possibility of changing the spontaneous gamma decay characteristics by the corresponding intentional modification of the 

The problem of control of Mossbauer nuclei gamma decay for the first time was considered about 25 years ago in the work [6]. In this work, we have made (without detailed analysis) investigated the possibility of controlling the probability of decay of excited Mossbauer nuclei by controlled mode restriction of electromagnetic vacuum (controlled change of spectral-volume density of quantized field modes p co)) by action of additional resonant or nonresonant screen. 

---