Cover Image

High-resolution measurement of the time-modulated orbital electron capture and of the β+ decay of hydrogen-like 142Pm60+ ions

The periodic time modulations, found recently in the two-body orbital electron capture (EC) decay of both, hydrogen-like 140Pr58+ and 142Pm60+ ions, with periods near to 7 s and amplitudes of about 20%, were re-investigated for the case of 142Pm60+ by using a 245 MHz resonator cavity with a much imp...

Full description

Saved in:
Bibliographic Details
Main Authors: Kienle, Paul (Author) , Bosch, F. (Author) , Bühler, P. (Author) , Faestermann, T. (Author) , Litvinov, Yuri A. (Author) , Winckler, N. (Author) , Sanjari, M. S. (Author) , Shubina, Daria (Author) , Atanasov, Dinko (Author) , Geissel, H. (Author) , Ivanova, V. (Author) , Yan, X. L. (Author) , Boutin, D. (Author) , Brandau, C. (Author) , Dillmann, I. (Author) , Dimopoulou, Ch. (Author) , Hess, R. (Author) , Hillebrand, P. -M. (Author) , Izumikawa, T. (Author) , Knöbel, R. (Author) , Kurcewicz, J. (Author) , Kuzminchuk, N. (Author) , Lestinsky, M. (Author) , Litvinov, S. A. (Author) , Ma, X. W. (Author) , Maier, L. (Author) , Mazzocco, M. (Author) , Mukha, I. (Author) , Nociforo, C. (Author) , Nolden, F. (Author) , Scheidenberger, Ch. (Author) , Spillmann, U. (Author) , Steck, M. (Author) , Stöhlker, Th. (Author) , Sun, B. H. (Author) , Suzaki, F. (Author) , Suzuki, T. (Author) , Torilov, S. Yu. (Author) , Trassinelli, M. (Author) , Tu, X. L. (Author) , Wang, M. (Author) , Weick, H. (Author) , Winters, D. F. A. (Author) , Winters, Natalya (Author) , Woods, P. J. (Author) , Yamaguchi, T. (Author) , Zhang, G. L. (Author) , Ohtsubo, T. (Author)
Format: Article (Journal)
Language:English
Published: 25 September 2013
In: Physics letters
Year: 2013, Volume: 726, Issue: 4/5, Pages: 638-645
ISSN:1873-2445
DOI:10.1016/j.physletb.2013.09.033
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2013.09.033
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269313007624
Get full text
Author Notes:Two-Body-Weak-Decays Collaboration: P. Kienle, F. Bosch, P. Bühler, T. Faestermann, Yu.A. Litvinov, N. Winckler, M.S. Sanjari, D.B. Shubina, D. Atanasov, H. Geissel, V. Ivanova, X.L. Yan, D. Boutin, C. Brandau, I. Dillmann, Ch. Dimopoulou, R. Hess, P.-M. Hillebrand, T. Izumikawa, R. Knöbel, J. Kurcewicz, N. Kuzminchuk, M. Lestinsky, S.A. Litvinov, X.W. Ma, L. Maier, M. Mazzocco, I. Mukha, C. Nociforo, F. Nolden, Ch. Scheidenberger, U. Spillmann, M. Steck, Th. Stöhlker, B.H. Sun, F. Suzaki, T. Suzuki, S.Yu. Torilov, M. Trassinelli, X.L. Tu, M. Wang, H. Weick, D.F.A. Winters, N. Winters, P.J. Woods, T. Yamaguchi, G.L. Zhang, T. Ohtsubo
Description
Summary:The periodic time modulations, found recently in the two-body orbital electron capture (EC) decay of both, hydrogen-like 140Pr58+ and 142Pm60+ ions, with periods near to 7 s and amplitudes of about 20%, were re-investigated for the case of 142Pm60+ by using a 245 MHz resonator cavity with a much improved sensitivity and time resolution. We observed that the exponential EC decay is modulated with a period T=7.11(11) s, in accordance with a modulation period T=7.12(11) s as obtained from simultaneous observations with a capacitive pick-up, employed also in the previous experiments. The modulation amplitudes amount to aR=0.107(24) and aP=0.134(27) for the 245 MHz resonator and the capacitive pick-up, respectively. These new results corroborate for both detectors exactly our previous findings of modulation periods near to 7 s, though with distinctly smaller amplitudes. Also the three-body β+ decays have been analyzed. For a supposed modulation period near to 7 s we found an amplitude a=0.027(27), compatible with a=0 and in agreement with the preliminary result a=0.030(30) of our previous experiment. These observations could point at weak interaction as origin of the observed 7 s-modulation of the EC decay. Furthermore, the data suggest that interference terms occur in the two-body EC decay, although the neutrinos are not directly observed.
Item Description:Im Titel sind das Pluszeichen, die Zahl 142 und 60+ hochgestellt
Gesehen am 07.04.2021
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2013.09.033

Similar Items