Meanlives Predictions for Rotational Excited Ground Band States for Even-Even Nuclei in Rare Earth and Actinide Series
||International Journal of Computer & Organization Trends (IJCOT)||
|© 2020 by IJCOT Journal|
|Volume - 10 Issue - 3
|Year of Publication : 2020|
|Authors : Biniyam Nigussie Edae, Ashok Kumar Chaubey|
MLA Style:Biniyam Nigussie Edae, Ashok Kumar Chaubey "Meanlives Predictions for Rotational Excited Ground Band States for Even-Even Nuclei in Rare Earth and Actinide Series" International Journal of Computer and Organization Trends 10.3 (2020): 14-20.
APA Style:Biniyam Nigussie Edae, Ashok Kumar Chaubey(2020). Meanlives Predictions for Rotational Excited Ground Band States for Even-Even Nuclei in Rare Earth and Actinide Series. International Journal of Computer and Organization Trends, 10(3), 14-20.
The measurement of mean life of excited states in nuclei is one of the most active areas of nuclear structure physics. In this work the asymmetric rotor model of Davydov- Filippov (DF) has been employed to study the mean lifetime in the rotational excited ground state band even-even nuclei of rare earth and actinide series which comprises of 57 nuclides. The mean life for E2-transitions raging up to 12+ spin states transi-tions have been studied in detailed in the spectra of nuclei whose mass number ranges as 150<=A<=190 and A>=228, and for those the first excited state 2+ and the second excited state 2+’ gamma band energies are available. The best input parameters have been em-ployed. These input parameters includes the energy involved in the transition, the total internal conversion coefficient, and the empirical reduced transition proba-bility B(E2). The mean lifetime have been calculated by using the most recent available experimental data. Comparison of results of theoretical calculations with the corresponding experimental data shows a very good agreement, including high angular momentum states. This work has incorporated many nuclides and transi-tions for which neither experimental nor theoretical values are available.
 Allmond, J. M. (2007). “Studies of Tri-axial Rotors and Band Mixing in Nuclei, Doctoral Dissertation”. Australian National University (2011) retrieved from http://bricc.anu.edu.au/index.php
 Biniyam, N. E, & Chaubey, K. A., (2017). “Calculation of Reduced Transition Probabilities B(E2) for Rotational Ex-cited Ground Band States Even-Even Nuclei in Lanthanide and Actinide Series”, International Journal of Scientific Re-search, 561-565.
 Bohr, A., & Mottelson, B. R. (1998). “Nuclear Defor-mations, Vol. 2 of Nuclear Structure, Singapore: World Sci-entific”.
 Davydov, A.S., & Filippov, G.F. (1958). “Rotational States in Even Atomic Nuclei”. Nuclear Physics 8, 237-249.
 Firestone, R. B. (1999). 8th Edition of the Table of Iso-topes.
 Nadirbekov, M.S. (2016). “Reduced E2-Transition Proba-bilities in the Excited Collective States of Triaxial Even-Even Nuclei”. Nuclear Theory, Vol. 35, 181-193.
 Pearson, J. (2008). “Nuclear Physics”, Lectures Notes, University of Manchester.
 Raman, S., Nestor, C. W., J. R., & Tikkanen, P. (2001). “Transition Probability from the Ground to the First-Excited 2+ State of Even–Even Nuclides”. Atomic Data and Nuclear Data Tables 78, 1–128.
 Singh, Y., Bihari, C., Sharma, A., Varshney, A. K., Singh, M., Varshney M., Dhiman, S. K., … Gupta, D. K. (2011). “Study of Tri-axial Deformation Variable ? in Even-Even Nuclei”, Proceedings of the DAE Symp. On Nucl. Phys. 56, 418-419.
 Singh, Y., Dhiman, S.K., Singh, M., Bihari, C., Varshney, A.K., Gupta, K.K., & Gupta, D.K. (2013). “In search of empirical rule relating E21and B(E2; 0+?2+) in asymmet-ric even-even nuclei of mass region A = 90 –120. Can.” J. Phys. 91, 777–782.
 Smith, A. G., Durell, J. L., Phillips, W. R., & Urban, W., (2012) “Lifetime measurements and nuclear deformation in the A ? 100 region”, Physical Review C 86, 014321.
 Varshney, M., Singh, M., Singh, Y., Bihari, C., Varshney, A. K., Gupta, K. K., & Gupta, D. K., (2009). “Study of Nu-clear Shapes in even mass region A~100”, Proceedings of the International Symposium on Nuclear Physics, 124-125.
 Varshney, M., Singh, M., Singh, Y., Bihari, C., Varshney, A. K., Gupta, K. K., & Gupta, D. K., (2011). “Seeking asymmetric rotors in mass region A~100–110” Phys. Scr. 83, 015201.
 Varshney, V. P. (1982). “Doctoral Dissertation”, Aligarh Muslim University, India.
asymmetric rotor model, reduced transition probabilities, internal conversion coefficient, mean life.