Download or read book Isotope Shift and Hyperfine Structure Measurements on Silver Actinium and Astatine by In source Resonant Ionization Laser Spectroscopy written by Andrea Teigelhöfer and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resonant ionization laser ion sources are applied worldwide to increase purity and intensity of rare isotopes at radioactive ion beam facilities. Especially for heavy elements the laser wavelengths required for efficient resonant laser ionization are not only element dependent, but also vary to small degrees from isotope to isotope. Since the first operation of an actinide target at ISAC-TRIUMF in 2008, the demand for neutron-rich isotopes far away from stability has steadily increased. Those isotopes often have very low production rates so that often only a few ions per second are released. In order to study isotope shifts and hyperfine structure of silver, actinium and astatine, in-source resonant ionization spectroscopy in combination with radioactive decay detection has been applied. Despite the Doppler limited resolution, it has the advantage that it is ultra-sensitive and the atomic spectrum for the nuclear ground and isomeric states can be investigated individually. An isobaric separation has been demonstrated for 115-119Ag, where the hyperfine structure of one state showed a splitting of 22 GHz to 38 GHz while for the other state only a single peak spectrum can be resolved. For astatine and actinium, the main interest is to measure and study the optical isotope shift, which is for the first excitation step for neutron-rich isotopes in the order of IS_FES≈±3.7GHz/u for both elements, as these observables give insight into nuclear moments and shape. In addition, also the isotope shift of the second excitation step for astatine has been measured to IS_SES,At≈-1.7GHz/u. Laser spectroscopy on astatine has mainly been performed on the neutron-deficient isotopes 199,205At due to high count rates and low isobaric contamination. With the results obtained it is possible to extrapolate the required wavelength for ionizing and delivering the isotopes 221-225At which are of interest to e.g. electric dipole moment studies.

Download or read book Isotope Shifts in Atomic Spectra written by W.H. King and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomic and nuclear physics are two flourishing but distinct branches of physics; the subject of isotope shifts in atomic spectra is one of the few that links these two branches. It is a subject that has been studied for well over fifty years, but interest in the subject, far from flagging, has been stimulated in recent years. Fast computers have enabled theoreticians to evaluate the properties of many-electron atoms, and laser spectroscopy has made it possible to measure isotope shifts in the previously unmeasurable areas of very rare isotopes, short-lived radioactive isotopes, weak transitions, and transitions involving high-lying atomic levels. Isotope shifts can now be measured with greater accuracy than before in both optical transitions and x-ray transitions of muonic atoms; this improved accuracy is revealing new facets of the subject. I am very grateful to Dr. H. G. Kuhn, F. R. S. , for having introduced me to the subject in the 1950s, and for supervising my efforts to measure isotope shifts in the spectrum of ruthenium. I thus approach the subject as an experimental atomic spectroscopist. This bias is obviously apparent in my use of the spectroscopist's notation of lower-upper for a transition, rather than the nuclear physicist's upper-lower. My reasons are given in Section 1. 3 and I hope that nuclear physicists will forgive me for using this notation even for muonic x-ray transitions.

Download or read book Measurement of the Isotope Shift and Hyperfine Structure Splitting of Xe II by Collinear Fast Ion Beam Laser Spectroscopy written by Jianhua Zhang and published by . This book was released on 1986 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigations of hyperfine structures and isotope shifts in al written by Peter Grundevik and published by . This book was released on 1982 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Isotope Shift and Hyperfine Structure Measurements in Preparation of the Ultra sensitive Detection of Krypton Atoms Using Stepwise Laser Excitation and Field Ionization written by Jens Lassen and published by . This book was released on 1996 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Spin and Hyperfine structure Measurements on the Radioactive iodine and Astatine Isotopes written by Hugh Leslie Garvin and published by . This book was released on 1959 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Spectroscopic Measurements of Isotope Shift and Hyperfine Structure in 207Bi 208Bi and 205Pb written by Marcelino Barboza-Flores and published by . This book was released on 1988 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Isotope Shift and Hyperfine Structure Measurements in Xe II in a Laser ion Beam Experiment written by E. Alvarez and published by . This book was released on 1978 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hyperfine Structure and Isotope Shift of 208Bi in the 3067 0A Resonance Line written by Joseph Lamontagne and published by . This book was released on 1982 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Isotope Shift Spectroscopy of Ions in Cryogenically Cooled Neutral Plasmas written by Nishant Bhatt and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes precision measurements of isotope shifts of Nd$^+$ ions using a novel cryogenic ion source. Isotope shift measurements are useful in searching for a hypothetical light boson that couples with electrons and neutrons, and which could be the long-sought-after dark matter particle. Isotope shifts of two transitions of the same element, scaled by a mass-dependent factor, can be plotted against each other to make a King plot. The nonlinearity of such a King plot can be used to constrain the mass of the new physics boson and its coupling strength to electrons and neutrons (denoted as $y_ey_n$). In this experiment, we take advantage of five stable spin-zero isotopes of neodymium to measure the isotope shifts of two optical transitions in Nd$^+$ with MHz-level accuracy. The experiment employs the cryogenic ion source, which is designed to produce cold and dense neutral plasmas by laser ablation of metal targets, followed by cryogenic buffer gas cooling. In this ion source, large ion densities ($\gtrsim 10^9$ cm$^{-3}$) can be obtained at temperatures as low as \SI{6}{\K}. The lasers used for the isotope shift measurements were stabilized using a novel transfer interferometer laser stabilization method, which is a simple and robust way to stabilize multiple lasers with different frequencies. The King plot analysis of the Nd$^+$ isotope shift measurements constrains $y_ey_n\lesssim \num{1.4e-9}$, which is comparable to the constraints placed by state-of-the-art isotope shift measurements on other atomic ions. We also discuss the prospects for further improvements to the accuracy of Nd$^+$ isotope shifts using telecom-band optical clock transitions identified in this thesis, which could probe for new physics bosons with $y_ey_n$ as low as $\num{e-15}$, and lead to extremely precise tests of physics beyond the standard model.

Download or read book Isotope Shift and Hyperfine Structure Studies of the Krypton Ion and the Thallium Atom written by Yingfeng Li and published by . This book was released on 1991 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of hyperfine structures an isotope shifts in alkali and alkaline earth atoms using laser spectroscopy methods written by Peter Grundevik and published by . This book was released on 1982 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hyperfine Structure and Isotope Shift of 30 year Bi207 in the 3067 Resonance Line written by Robert Chuckrow and published by . This book was released on 1969 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High fidelity in Isotope Ratio Measurements for Resonance Ionization Mass Spectrometry written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculations are performed to gauge the effect of the convolution of atomic spectral characteristics with laser sources upon isotope ratio measurements by Resonance Ionization Mass Spectrometry (RIMS). Comparison with experimental data is included. 7 refs., 3 figs.

Download or read book Hyperfine Structure and Isotope Shift in Some Radioactive Isotopes of Thallium written by Robert Joseph Hull and published by . This book was released on 1961 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Isotope Shift and Hyperfine Structure in Atomic Spectra written by S. A. Ramsden and published by . This book was released on 1956 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantities Units and Symbols in Physical Chemistry written by International Union of Pure and Applied Chemistry. Physical and Biophysical Chemistry Division and published by Royal Society of Chemistry. This book was released on 2007 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared by the IUPAC Physical Chemistry Division this definitive manual, now in its third edition, is designed to improve the exchange of scientific information among the readers in different disciplines and across different nations. This book has been systematically brought up to date and new sections added to reflect the increasing volume of scientific literature and terminology and expressions being used. The Third Edition reflects the experience of the contributors with the previous editions and the comments and feedback have been integrated into this essential resource. This edition has been compiled in machine-readable form and will be available online.