Journal article
Authors list: Miskun, Ivan; Dickel, Timo; Mardor, Israel; Hornung, Christine; Amanbayev, Daler; San Andres, Samuel Ayet; Bergmann, Julian; Ebert, Jens; Geissel, Hans; Gorska, Magdalena; Greiner, Florian; Haettner, Emma; Plass, Wolfgang R.; Purushothaman, Sivaji; Scheidenberger, Christoph; Rink, Ann-Kathrin; Weick, Helmut; Bagchi, Soumya; Constantin, Paul; Kaur, Satbir; Lippert, Wayne; Mei, Bo; Moore, Iain; Otto, Jan-Hendrick; Pietri, Stephane; Pohjalainen, Ilkka; Prochazka, Andrej; Rappold, Christoph; Reiter, Moritz P.; Tanaka, Yoshiki K.; Wineld, John S.
Publication year: 2019
Journal: The European Physical Journal A
Volume number: 55
Issue number: 9
ISSN: 1434-6001
eISSN: 1434-601X
Open access status: Hybrid
DOI Link: https://doi.org/10.1140/epja/i2019-12837-8
Publisher: Springer
Abstract:
A novel method for simultaneous measurement of masses, Q-values, isomer excitation energies, half-lives and decay branching ratios of exotic nuclei has been demonstrated. The method includes first use of a stopping cell as an ion trap, combining storage of mother and daughter nuclides for variable durations in a cryogenic stopping cell (CSC), and afterwards the identification and counting of them by a multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS). We utilized our method to record the decay and growth of the Po-216 and Pb-212 isotopes (alpha decay) and of the Sb-119m2 isomer (t(1/2) = 850 +/- 90 ms) and Sb-119g isotope (isomer transition), obtaining half-lives consistent with literature values. The amount of non-nuclear-decay losses in the CSC up to similar to 10 s is negligible, which exhibits its extraordinary cleanliness. For Sb-119 isotopes, we present the first direct measurements of the mass of its ground state, and the excitation energy and decay branching ratios of its second isomeric state (Sb-119m2). This resolves discrepancies in previous excitation energy data, and is the first direct evidence that the Sb-119m2 isomer decays dominantly via gamma emission. These results pave the way for the measurement of branching ratios of exotic nuclei.
Citation Styles
Harvard Citation style: Miskun, I., Dickel, T., Mardor, I., Hornung, C., Amanbayev, D., San Andres, S., et al. (2019) A novel method for the measurement of half-lives and decay branching ratios of exotic nuclei, The European Physical Journal A, 55(9), Article 148. https://doi.org/10.1140/epja/i2019-12837-8
APA Citation style: Miskun, I., Dickel, T., Mardor, I., Hornung, C., Amanbayev, D., San Andres, S., Bergmann, J., Ebert, J., Geissel, H., Gorska, M., Greiner, F., Haettner, E., Plass, W., Purushothaman, S., Scheidenberger, C., Rink, A., Weick, H., Bagchi, S., Constantin, P., ...Wineld, J. (2019). A novel method for the measurement of half-lives and decay branching ratios of exotic nuclei. The European Physical Journal A. 55(9), Article 148. https://doi.org/10.1140/epja/i2019-12837-8
Keywords
Cryogenic stopping cell; ISOMERS; PROJECTILE; PROTON; SUPER-FRS
