New test of modulated electron capture decay of hydrogen-like <SUP>142</SUP>Pm ions: Precision measurement of purely exponential decay

Ozturk, F.; Akkus, Baki; Atanasov, D.; Beyer, H.; Bosch, F.; Boutin, D.; Brandau, C.; Buehler, P.; Cakirli, Rabia; Chen, R.; Chen, W.; Chen, X.; Dillmann, I; Dimopoulou, C.; Enders, W.; Essel, H.; Faestermann, T.; Forstner, O.; Gao, B.; Geissel, H.; Gernhaeuser, R.; Grisenti, R.; Gumberidze, A.; Hagmann, S.; Heftrich, T.; Heil, M.; Herdrich, M.; Hillenbrand, P-M; Izumikawa, T.; Kienl, P.; Klaushofer, C.; Kleffner, C.; Kozhuharov, C.; Knoebel, R.; Kovalenko, O.; Kreim, S.; Kuehl, T.; Lederer-Woods, C.; Lestinsky, M.; Litvinov, S.; Litvinov, Yu; Liu, Z.; Ma, X.; Maier, L.; Mei, B.; Miura, H.; Mukha, I; Najafi, A.; Nagae, D.; Nishimura, T.; Nociforo, C.; Nolden, F.; Ohtsubo, T.; Oktem, Yeşim; Omika, S.; Ozawa, A.; Petridis, N.; Piotrowski, J.; Reifarth, R.; Rossbach, J.; Sanchez, R.; Sanjari, M.; Scheidenberger, C.; Sidhu, R.; Simon, H.; Spillmann, U.; Steck, M.; Stoehlker, Th; Sun, B.; Susam, Lidya; Suzaki, F.; Suzuki, T.; Torilov, S.; Trageser, C.; Trassinelli, M.; Trotsenko, S.; Tu, X.; Walker, P.; Wang, M.; Weber, G.; Weick, H.; Winckler, N.; Winters, D.; Woods, P.; Yamaguchi, T.; Xu, X.; Yan, X.; Yang, J.; Yuan, Y.; Zhang, Y.; Zhou, X.

doi:10.1016/j.physletb.2019.134800

New test of modulated electron capture decay of hydrogen-like <SUP>142</SUP>Pm ions: Precision measurement of purely exponential decay

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Ozturk F. C., Akkus B., Atanasov D., Beyer H., Bosch F., Boutin D., ...More

PHYSICS LETTERS B, 2019 (SCI-Expanded)

Publication Type: Article / Article
Publication Date: 2019
Doi Number: 10.1016/j.physletb.2019.134800
Journal Name: PHYSICS LETTERS B
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Keywords: Two body weak decay, Orbital electron capture, Single particle decay spectroscopy, Heavy ion storage ring, SCHOTTKY-MASS-SPECTROMETRY, STORED EXOTIC NUCLEI, HEAVY-IONS, STORAGE, STATE, FRS, OSCILLATIONS, ISOMERS, LISE
Istanbul University Affiliated: Yes

Abstract

An experiment addressing electron capture (EC) decay of hydrogen-like Pm-142(60+) ions has been conducted at the experimental storage ring (ESR) at GSI. The decay appears to be purely exponential and no modulations were observed. Decay times for about 9000 individual EC decays have been measured by applying the single-ion decay spectroscopy method. Both visually and automatically analysed data can be described by a single exponential decay with decay constants of 0.0126(7) s(-1) for automatic analysis and 0.0141(7) s(-1) for manual analysis. If a modulation superimposed on the exponential decay curve is assumed, the best fit gives a modulation amplitude of merely 0.019(15), which is compatible with zero and by 4.9 standard deviations smaller than in the original observation which had an amplitude of 0.23(4). (C) 2019 The Author(s). Published by Elsevier B.V.