First use of high charge states for mass measurements of short-lived nuclides in a Penning trap.
نویسندگان
چکیده
Penning trap mass measurements of short-lived nuclides have been performed for the first time with highly charged ions, using the TITAN facility at TRIUMF. Compared to singly charged ions, this provides an improvement in experimental precision that scales with the charge state q. Neutron-deficient Rb isotopes have been charge bred in an electron beam ion trap to q=8-12+ prior to injection into the Penning trap. In combination with the Ramsey excitation scheme, this unique setup creating low energy, highly charged ions at a radioactive beam facility opens the door to unrivaled precision with gains of 1-2 orders of magnitude. The method is particularly suited for short-lived nuclides such as the superallowed β emitter 74Rb (T(1/2)=65 ms). The determination of its atomic mass and an improved Q(EC) value are presented.
منابع مشابه
Detection Techniques for On-Line Mass Determination with Penning Traps
A Penning trap mass spectrometer is a well established instrument for the precise mass determination of both, stable and short-lived nuclides. For this purpose two different concepts are employed. Masses of stable species are mostly determined by the non-destructive detection of image currents induced in the trap electrodes and a subsequent Fourier transformation (FT). For short-lived nuclides ...
متن کاملDetection technique with single-ion sensitivity for high-precision mass measurements on superheavy elements
Mass values contribute to a number of physical models: these range from masses of exotic short-lived nuclides being important for weak interaction studies and the Standard Model of particle physics, to stable masses as means for the definition of fundamental constants [1]. Since the discovery of the superheavy elements from to , the investigations in their masses have become more and more impor...
متن کاملRamsey method of separated oscillatory fields for high-precision penning trap mass spectrometry.
Ramsey's method of separated oscillatory fields is applied to the excitation of the cyclotron motion of short-lived ions in a Penning trap to improve the precision of their measured mass values. The theoretical description of the extracted ion-cyclotron-resonance line shape is derived and its correctness demonstrated experimentally by measuring the mass of the short-lived 38Ca nuclide with an u...
متن کاملMass Measurements of No and Lr isotopes with SHIPTRAP
M. Block1, D. Ackermann1, K. Blaum2,3, C. Droese4, Ch. E. Düllmann5,6,1, M. Dworschak1, M. Eibach3,5, S. Eliseev2, A. Gonschior5, E. Haettner1,7, F. Herfurth1, F.P. Heßberger1,6, S. Hofmann1, J. Ketelaer2, G. Marx4, M. Mazzocco8, E. Minaya Ramirez6, D. Nesterenko9, Yu. Novikov9, W. R. Plaß1,7, D. Rodrı́guez10, C. Scheidenberger1,7, L. Schweikhard4, P. Thirolf11, and C. Weber11 1GSI, Darmstadt, G...
متن کاملEUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH Proposal to the ISOLDE and Neutron Time-of-Flight Committee (19 October 2009) High-Precision Mass Measurements in the Rare-Earth Region to Investigate the Proton-Neutron Interaction
We propose precision mass measurements on a series of short-lived nuclides for the investigation of proton-neutron interactions and two neutron separation energies and their role in nuclear structure, especially concerning deformation and collectivity. The nuclides include neutron-rich Nd, Sm, Dy, Er, and Yb isotopes, as well as Hf. The investigations will require the Penning trap mass-spectrom...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 107 27 شماره
صفحات -
تاریخ انتشار 2011