High-resolution, accurate multiple-reflection time-of-flight mass spectrometry for short-lived, exotic nuclei of a few events in their ground and low-lying isomeric states
Andrés, S. A. S., Hornung, C., Ebert, J., Plaß, W. R., Dickel, T., Geissel, H., Scheidenberger, C., Bergmann, J., Greiner, F., Haettner, E., Jesch, C., Lippert, W., Mardor, I., Miskun, I., Patyk, Z., Pietri, S., Pihktelev, A., Purushothaman, S., Reiter, M. P., . . . Xu, X. (2019). High-resolution, accurate multiple-reflection time-of-flight mass spectrometry for short-lived, exotic nuclei of a few events in their ground and low-lying isomeric states. Physical Review C, 99(6), Article 064313. https://doi.org/10.1103/PhysRevC.99.064313
Published in
Physical Review CAuthors
Mei, Bo |
Date
2019Copyright
© The Authors, 2019.
Mass measurements of fission and projectile fragments, produced via
238
U
and
124
Xe
primary beams, have been performed with the multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) of the Fragment Separator (FRS) Ion Catcher with a mass resolving power (FWHM) of up to 410 000 and an uncertainty of down to
6
×
10
−
8
. The nuclides were produced and separated in flight with the fragment separator FRS at 300 to 1000 MeV/u and thermalized in a cryogenic stopping cell. The data-analysis procedure was developed to determine with highest accuracy the mass values and the corresponding uncertainties for the most challenging conditions: down to a few events in a spectrum and overlapping distributions, which can be distinguished from a single peak only by a broader peak shape. With this procedure, the resolution of low-lying isomers is increased by a factor of up to 3 compared to standard data analysis. The ground-state masses of 31 short-lived nuclides of 15 different elements with half-lives of down to 17.9 ms and count rates as low as 11 events per nuclide were determined. This is the first direct mass measurement for seven nuclides. The excitation energies and the isomer-to-ground-state ratios of six isomeric states with excitation energies of as little as 280 keV were measured. For nuclides with known mass values, the average relative deviation from the literature values is
(
4.5
±
5.3
)
×
10
−
8
. The measured two-neutron separation energies and their slopes near and at the
N
=
126
and
Z
=
82
shell closures indicate a strong element-dependent binding energy of the first neutron above the closed proton shell
Z
=
82
. The experimental results deviate strongly from the theoretical predictions, especially for
N
=
126
and
N
=
127
.
...
Publisher
American Physical SocietyISSN Search the Publication Forum
2469-9985Keywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/30942521
Metadata
Show full item recordCollections
License
Related items
Showing items with similar title or keywords.
-
First spatial separation of a heavy ion isomeric beam with a multiple-reflection time-of-flight mass spectrometer
Dickel, T.; Plaß, W.R.; Andres, S. Ayet San; Ebert, J.; Geissel, H.; Haettner, E.; Hornung, C.; Miskun, I.; Pietri, S.; Purushothaman, S.; Reiter, M.P.; Rink, A.-K.; Scheidenberger, C.; Weick, H.; Dendooven, P.; Diwisch, M.; Greiner, F.; Heiße, F.; Knöbel, R.; Lippert, W.; Moore, Iain; Pohjalainen, Ilkka; Prochazka, A.; Ranjan, M.; Takechi, M.; Winfield, J.S.; Xu, X. (Elsevier BV * North-Holland, 2015)211Po ions in the ground and isomeric states were produced via 238U projectile fragmentation at 1000 MeV/u. The 211Po ions were spatially separated in flight from the primary beam and other reaction products by the ... -
Offline commissioning of the multi-reflection time-of-flight mass separator at JYFLTRAP
Virtanen, Ville (2019)Tässä työssä esitellään Jyväskylän yliopiston kiihdytinlaboratoriossa sijaitsevaan IGISOL-laitokseen rakennetun moniheijastavan lentoaika-massaerottajan (engl. Multi- Reflection Time-of-Flight mass separator, MR-ToF-ms) ... -
A time-of-flight correction procedure for fast-timing data of recoils with varying implantation positions at a spectrometer focal plane
Mallaburn, M.J.; Singh, B.S. Nara; Cullen, D. M.; Hodge, D.; Taylor, M.J.; Giles, M.M.; Barber, L.; Niţă, C.R.; Mihai, R.E.; Mihai, C.; Mărginean, R.; Mărginean, N.; Nobs, C.R.; Gamba, E.R.; Bruce, A.M.; Scholey, Catherine; Rahkila, Panu; Greenlees, Paul; Badran, Hussam; Grahn, Tuomas; Neuvonen, O.; Auranen, Kalle; Bisso, F.; Cox, Daniel; Herzan, Andrej; Julin, Rauno; Konki, Joonas; Lightfoot, A.K.; Pakarinen, Janne; Papadakis, P.; Partanen, Jari; Sandzelius, Mikael; Sarén, Jan; Sorri, Juha; Stolze, Sanna; Uusitalo, Juha; Regan, P.H.; Podolyák, Zs.; Lalkovski, S.; Smith, J.F.; Smolen, M. (Elsevier; North-Holland, 2019)Fast-timing measurements at the focal plane of a separator can suffer from poor timing resolution. This is due to the variations in time-of-flight (ToF) for photons travelling to a given detector, which arise from the ... -
Detailed structure of 131Sn populated in the 𝛽 decay of isomerically purified 131In states
Benito, J.; Fraile, L. M.; Korgul, A.; Piersa-Siłkowska, M.; Jaries, A.; Stryjczyk, M.; Adamska, E.; Álvarez-Rodríguez, R.; Andreyev, A. N.; Barzakh, A. E.; Benzoni, G.; Berry, T.; Borge, M. J. G.; Carmona, M.; Chrysalidis, K.; Costache, C.; Cubiss, J. G.; Day Goodacre, T.; De Witte, H.; Eronen, T.; Fedorov, D. V.; Fedosseev, V. N.; Fernández-Martínez, G.; Fijałkowska, A.; Fila, M.; Fynbo, H.; Galaviz, D.; Galve, P.; García-Díez, M.; Ge, Z.; Greenlees, P. T.; Grzywacz, R.; Henrich, C.; Huyse, M.; Ibáñez, P.; Illana, A.; Janas, Z.; Jolie, J.; Judson, D. S.; Kankainen, A.; Karayonchev, V.; Kicińska-Habior, M.; Konki, J.; Kurcewicz, J.; Lazarus, I.; Lică, R.; López-Montes, A.; Lund, M.; Mach, H.; Madurga, M.; Mărginean, N.; Mărginean, R.; Marroquín, I.; Marsh, B. A.; Martínez, M. C.; Mazzocchi, C.; Miernik, K.; Mihai, C.; Mihai, R. E.; Mougeot, M.; Murias, J. R.; Nácher, E.; Negret, A.; Olaizola, B.; Page, R. D.; Paulauskas, S. V.; Pascu, S.; Perea, A.; Pucknell, V.; Raggio, A.; Rahkila, P.; Raison, C.; Rapisarda, E.; Régis, J.-M.; Rezynkina, K.; Rotaru, F.; Rothe, S.; Ruotsalainen, J.; Sánchez-Parcerisa, D.; Sánchez-Tembleque, V.; Schomacker, K.; Simpson, G. S.; Sotty, Ch.; Stan, L.; Stănoiu, M.; Tengblad, O.; Turturica, A.; Udías, J. M.; Van Duppen, P.; Vedia, V.; Villa-Abaunza, A.; Viñals, S.; Wadsworth, R.; Walters, W. B.; Warr, N.; IDS and IGISOL Collaboration (American Physical Society, 2024)The excited structure of the single-hole nucleus 131Sn populated by the 𝛽− decay of 131In was investigated in detail at the ISOLDE facility at CERN. This new experiment took advantage of isomeric purification capabilities ... -
Characterization of Supersonic Gas Jets for High-Resolution Laser Ionization Spectroscopy of Heavy Elements
Zadvornaya, A.; Creemers, P.; Dockx, K.; Ferrer, R.; Gaffney, L. P.; Gins, W.; Granados, C.; Huyse, M.; Kudryavtsev, Yu.; Laatiaoui, M.; Mogilevskiy, E.; Raeder, S.; Sels, S.; Bergh, P. Van den; Van Duppen, P.; Verlinde, M.; Verstraelen, E.; Nabuurs, M.; Reynaerts, D.; Papadakis, Philippos (American Physical Society, 2018)The method of laser spectroscopy in supersonic gas jets was proposed for high-resolution and high-efficiency in-gas laser ionization and spectroscopy studies of short-lived nuclei. The flow properties of such supersonic ...