Abstract
Alkali ion beams are among the most intense produced by the ISOLDE facility. These were the first to be studied by the ISOLTRAP mass spectrometer and ever since, new measurements have been regularly reported. Recently the masses of very neutron-rich and short-lived cesium isotopes were determined at ISOLTRAP. The isotope 148Cs was measured directly for the first time by Penning-trap mass spectrometry. Using the new results, the trend of two-neutron separation energies in the cesium isotopic chain is revealed to be smooth and gradually decreasing, similar to the ones of the barium and xenon isotopic chains. Predictions of selected microscopic models are employed for a discussion of the experimental data in the region.
Highlights
The radioactive ion-beam facility ISOLDE/CERN [1] has proven to be an excellent place for performing precision mass measurements of short-lived isotopes, most recent examples of which can be found in [2,3,4,5,6,7]
The history of the facility highlights a number of key mass measurements carried out in the late seventies and throughout the eighties at the Orsay’s double-focusing mass spectrometer [8, 9], which demonstrated the importance of direct mass measurements of short-lived nuclides
The ISOLTRAP setup consists of a segmented linear radio-frequency quadrupole trap (RFQ) [22] a multi-reflection time-of-flight mass separator (MR-TOF MS) [23, 24], a preparation as well as a precision Penning traps, the latter two devices are placed in the center of superconducting magnets [25, 26]
Summary
The radioactive ion-beam facility ISOLDE/CERN [1] has proven to be an excellent place for performing precision mass measurements of short-lived isotopes, most recent examples of which can be found in [2,3,4,5,6,7]. Following the success of these measurements, in the mid eighties the Penning-trap mass spectrometer ISOLTRAP was installed at ISOLDE [10]. This project was motivated by the increased demand for more precise atomic masses of short-lived nuclides [11]. It is important to emphasize that this necessity is still present today, which one can illustrate by the number of Penning-trap projects operating (or under commissioning) at radioactive ion-beam facilities (see table 2 in [12]). The Penning-trap mass spectrometry is to date the most powerful tool allowing to reach the highest control over precision and accuracy in atomic mass measurements
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics G: Nuclear and Particle Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
