3rd Jagiellonian Symposium on Fundamental and Applied Subatomic Physics

The energy released by electron capture into different atomic subshells of $^{242m}$Am isomer for different ionization degrees

25 Jun 2019, 13:30

1h 45m

Collegium Maius

Board: 11

poster Poster session

Speaker

Łukasz Syrocki (Nicolaus Copernicus University)

Description

Following the first experimental observation of $^{93m}$Mo isomer depletion via nuclear excitation by electron capture (NEEC), we have made theoretical investigation related to the $^{242m}$Am isomer ($T_{1/2}$ ~ 141 y). It is worth to underline that for $^{242m}$Am isomer the probability of the NEEC process can be even higher than for the $^{93m}$Mo isomer [1-3].

We have performed here the extensive multiconfiguration Dirac-Fock [4-9] study concerning the dependence of the energy released by electron capture into different subshells for N, O and P shell of $^{242m}$Am isomer on the degree of ionization and electronic configuration.

These study have a basic research character, because they are concentrated on a systematic study directed toward greater knowledge and understanding of the various aspects of a new physical phenomena, i.e. the NEEC process. The presented studies may contribute to the development of the concept of new ultra-energy-dense nuclear power sources, and $\gamma$-ray lasers.

ACKNOWLEDGMENTS
This work is supported by the Polish National Science Center under Grant number 2017/25/B/ST2/00901.

REFERENCES
[1] M. Polasik, K. Słabkowska, J.J. Carroll, C.J. Chiara, Ł. Syrocki, E. Węder, and J. Rzadkiewicz, Phys. Rev. C 95 034312 (2017).
[2] C. J. Chiara, J. J. Carroll, M. P. Carpenter, J. P. Greene, D. J. Hartley, R. V. F. Janssens, G. J. Lane, J. C. Marsh, D. A. Matters, M. Polasik, J. Rzadkiewicz, D. Seweryniak, S. Zhu, S. Bottoni, A. B. Hayes & S. A. Karamian, Nature 554 216–218 (2018).
[3] J. Rzadkiewicz, M. Polasik, K. Słabkowska, Ł. Syrocki, E. Węder, J.J. Carroll, C.J. Chiara, Phys. Rev. C 99, 044309 (2019).
[4] I.P. Grant, Int. J. Quantum Chem. 25 23 (1984).
[5] K.G. Dyall, I.P. Grant, C.T. Johonson, F.A. Parpia, and E.P. Plummer, Comput. Phys. Commun. 55 425 (1989).
[6] M. Polasik, Phys. Rev. A 39 616 (1989); Phys. Rev. 41 3689 (1990); Phys. Rev. 52 227 (1995); Phys. Rev. 58 1840 (1998).
[7] F.A. Parpia, C.F. Fischer, and I.P. Grant, Comput. Phys. Commun. 94 249 (1996).
[8] P. Jönsson, X. He, C.F. Fischer, and I.P. Grant, Comput. Phys. Commun. 177 597 (2007).
[9] C. F. Fischer and G. Gaigalas, Phys. Rev. A 85 042501 (2012).