Production cross section and decay study of Es-243 and Md-249


Briselet, R, Theisen, Ch, Vandebrouck, M, Marchix, A, Airiau, M, Auranen, K, Badran, H, Boilley, D, Calverley, T, Cox, D et al (show 35 more authors) (2019) Production cross section and decay study of Es-243 and Md-249. PHYSICAL REVIEW C, 99 (2). 024614-.

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Abstract

In the study of the odd-$Z$, even-$N$ nuclei $^{243}$Es and $^{249}$Md, performed at the University of Jyv\"askyl\"a, the fusion-evaporation reactions $^{197}$Au($^{48}$Ca,2$n$)$^{243}$Es and $^{203}$Tl($^{48}$Ca,2$n$)$^{249}$Md have been used for the first time. Fusion-evaporation residues were selected and detected using the RITU gas-filled separator coupled with the focal-plane spectrometer GREAT. For $^{243}$Es, the recoil decay correlation analysis yielded a half-life of $24 \pm 3$s, and a maximum production cross section of $37 \pm 10$ nb. In the same way, a half-life of $26 \pm 1$ s, an $\alpha$ branching ratio of 75 $\pm$ 5%, and a maximum production cross section of 300 $\pm$ 80 nb were determined for $^{249}$Md. The decay properties of $^{245}$Es, the daughter of $^{249}$Md, were also measured: an $\alpha$ branching ratio of 54 $\pm$ 7% and a half-life of 65 $\pm$ 6 s. Experimental cross sections were compared to the results of calculations performed using the KEWPIE2 statistical fusion-evaporation code.

Item Type: Article
Uncontrolled Keywords: nucl-ex, nucl-ex
Depositing User: Symplectic Admin
Date Deposited: 03 Oct 2018 15:21
Last Modified: 19 Jan 2023 01:15
DOI: 10.1103/PhysRevC.99.024614
Open Access URL: https://doi.org/10.1103/PhysRevC.99.024614
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3027053
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