Open Access
Subscription Access
Into the Fission Valley of 'magic Nucleus' Polonium
The word 'radioactive' was first coined by Marie Curie when she, along with her husband Pierre Curie, discovered the element Polonium (Po). The nucleus 210Po is a testing ground for many theoretical and experimental aspects of nuclear structure as well as nuclear fission dynamics as it is a 'magic nucleus' with neutron number N = 126. At Variable Energy Cyclotron Centre, Kolkata, the fission of Polonium nuclei is being studied in order to understand the survival of nuclear shell effects that is known to be the key for the stability of super heavy elements (SHE).
Keywords
Mass Distribution, Nuclear Fission, Shell Effects, Super Heavy Elements.
User
Font Size
Information
- Sklodowska-Curie, M., C. R. Acad. Sci., 1898, 126, 1101.
- Curie, P. and Curie, M., C. R. Acad. Sci., 1898, 127, 175.
- Van Noorden, R., Four chemical elements added to periodic table. Nature, 2016; doi:10.1038/nature.2016.19112.
- Oganessian, Y. T. and Utyonkov, V. K., Super-heavy element research. Rep. Prog. Phys., 2015, 78, 036301.
- Duellmann, C. E. and Block, M., Island of heavy weights. Sci. Am., March 2018, 42.
- Banerjee, K., et al., Fission dynamics study in 243Am and 254Fm. Phys. Rev. C, 2016, 93, 064602.
- Chaudhuri, A. et al., Fission fragment mass distributions in reactions populating 200Pb. Phys. Rev. C, 2016, 94, 024617.
- Chaudhuri, A. et al., Direct evidence of washing out of nuclear shell effects. Phys. Rev. C, 2015, 91, 044620.
- Chaudhuri, A. et al., No influence of a N = 126 neutron-shell closure in fission-fragment mass distributions. Phys. Rev. C, 2015, 92, 041601(R).
- Sen, A. et al., Fission fragment mass distributions from 210Po and 213At. Phys. Rev. C, 2017, 96, 064609.
- Schmitt, C., Mazurek, K. and Nadtochy, P. N., On current ambiguity in the interpretation of fission at intermediate excitation energy. Phys. Lett. B, 2014, 737, 289.
- Golda, K. S. et al., Determination of shell correction energies at saddle point using pre-scission neutron multiplicities. Nucl. Phys. A, 2013, 913, 157.
- Shrivastava, A. et al., Shell effects in fission fragment anisotropies for 12C + 194,198Pt systems. Phys. Rev. Lett., 1999, 82, 699.
- Mahata, K. and Kailas, S., Re-examination of fission in the A ≈ 200 mass region with excitation energy near 50 MeV. Phys. Rev. C, 2017, 95, 054616.
- Mahata, K., Kailas, S. and Kapoor, S. S., Fission barrier, damping of shell correction, and neutron emission in the fission of A
- ∼ 200. Phys. Rev. C, 2015, 92, 034602 and references therein.
- Ghosh, T. K. et al., Time of flight (TOF) spectrometer for accurate measurement of mass and angular distribution of fission fragments in heavy ion induced fission reactions. Nucl. Instrum. Methods Phys. Res. A, 2005, 540, 285.
- Hahn, O. and Strassmann, F., Naturwissenschaften, 1939, 27(1), 11.
- Meitner, L. and Frisch, O. R., Disintegration of uranium by neutrons: A new type of nuclear reaction. Nature (London), 1939, 143, 239.
- Bohr, N. and Wheeler, J. A., The mechanism of nuclear fission. Phys. Rev., 1939, 56, 426.
- Moller, P. and Nilsson, S. G., The fission barrier and odd multipole shape distortions. Phys. Lett., 1970, 31B, 283.
- Andreyev, A. N. et al., New type of asymmetric fission in protonrich nuclei. Phys. Rev. Lett., 2010, 105, 252–502.
- Moller, P. and Randrup, J., Calculated fission-fragment yield systematics in the region 74 ≤ Z ≤ 94 and 90 ≤ N ≤ 150. Phys. Rev. C, 2015, 91, 044316.
- McDonnell, J. D., Nazarewicz, W., Sheikh, J. A., Staszczak, A. and Warda, M., Excitation-energy dependence of fission in the mercury region. Phys. Rev. C, 2014, 90, 021302(R).
Abstract Views: 371
PDF Views: 130