Atomic screening of nuclear transitions
نویسندگان
چکیده
In the analysis of time-reversal and Mossbauer absorption experiments, it is important to consider atomic processes which interfere with the dllect nuclear transition. Interaction of the photon with the atomic electrons causes the radiation to acquire a phase shift,-specified by the interference parameter s(L1T). We present theoretical expressions for 5 and compare our calculated values with experiment. Satisfactory agreement is obtained. In particular, an apparent violation of time-reversal invariance in the 129-keV transition of 191lr is fully explained by these effects.
منابع مشابه
Application of Nuclear Quadrupole Resonance to Detection of Explosives and Research Activities at CIAE
The detection of explosives is a challenging topic. The nitrogen-14 nuclear quadrupole resonance technique exploits the transitions between the energy levels split by the quadrupole interaction to detect the presence of explosives. It is a very promising new technique owing to its unambiguous detection and identification of explosives with low false alarm, high sensitivity and fast detection. T...
متن کاملPreparation of [111In]-Bleomycin radiopharmaceutical [Persian]
In this study, the preparation of 111In-Bleomycin complex was optimized for temperature, time, concentration and pH during several experiments. The results showed that by the addition of bleomycin to 111In-InCl3 sample (dried under flow of N2) and heating the mixture up to 90-100°C the radiopharmaceutical can be obtained in 99.5% yield and a specific activity of 1.745 Ci/mmol. The final s...
متن کاملProduction and quality control of 82mRb and primary PET scans using its radiopharmaceutical for heart examinations [Persian]
According to the importance of positron emitters in nuclear medicine, 82mRb was produced as a member of this group of radiopharmaceuticals. After being converted into an injectable form, enough information was provided for imaging with this radiopharmaceutical. 82mRb with high radioisotopic purity and half-life of 6.5 hours, in chloride form, can be considered as a suitable positron emitt...
متن کاملNuclear polarizability of helium isotopes in atomic transitions
Nuclear polarizability of helium isotopes in atomic transitions K. Pachucki1 and A.M. Moro2 1 Institute of Theoretical Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland 2Departamento de FAMN, Universidad de Sevilla, Apartado 1065, 41080 Sevilla, Spain Abstract We estimate the nuclear polarizability correction to atomic transition frequencies in various helium isotopes. This effect is n...
متن کاملProduction, formulation, quality control and primary biological studies of [18F]KF for skeletal PET scanning [Persian]
[18F]KF, considered as a reference standard for positron emission tomography of the skeletal system, was produced by the bombardment of enriched water ([18O]H2O>95%) with high energy protons in NRCAM cyclotron. After the extraction of fluoride from enriched water as KF, and passing it through microbial filter and fine adjustment of acidity and osmolality, it was converted into an injectab...
متن کامل