Search results for "Mercury Isotopes"

On-line laser spectroscopy of short-lived mercury isotopes

1978

Use of radiation sources with mercury isotopes for real-time highly sensitive and selective benzene determination in air and natural gas by different…

2015

A new analytical portable system is proposed for the direct determination of benzene vapor in the ambient air and natural gas, using differential absorption spectrometry with the direct Zeeman effect and innovative radiation sources: capillary mercury lamps with different isotopic compositions ((196)Hg, (198)Hg, (202)Hg, (204)Hg, and natural isotopic mixture). Resonance emission of mercury at a wavelength of 254 nm is used as probing radiation. The differential cross section of benzene absorption in dependence on wavelength is determined by scanning of magnetic field. It is found that the sensitivity of benzene detection is enhanced three times using lamp with the mercury isotope (204)Hg in…

Shape coexistence in neutron-deficient Hg isotopes studied via lifetime measurements in Hg-184,Hg-186 and two-state mixing calculations

2014

Abstract: The neutron-deficient mercury isotopes, 184 , 186 Hg, were studied with the recoil distance Doppler-shift method using the Gammasphere array and the K ̈ oln plunger device. The differential decay curve method was employed to determine the lifetimes of the yrast states in 184 , 186 Hg. An improvement on previously measured values of yrast states up to 8 + is presented as well as first values for the 9 3 state in 184 Hg and 10 + state in 186 Hg. B ( E 2) values are calculated and compared to a two-state mixing model which utilizes the variable moment of inertia model, allowing for extraction of spin-dependent mixing strengths and amplitudes. peerReviewed

Nuclear Shape Staggering in Very Neutron-Deficient Hg Isotopes Detected by Laser Spectroscopy

1977

The isotope shifts of $^{188}\mathrm{Hg}$, $^{186}\mathrm{Hg}$, and $^{184}\mathrm{Hg}$ in the 2537-\AA{} line have been measured by use of tunable dye laser at the on-line mass separator ISOLDE at CERN. The results are $\ensuremath{\delta}\ensuremath{\nu}(^{188}\mathrm{Hg}\ensuremath{-}^{204}\mathrm{Hg})=35.8(2)$ GHz; $\ensuremath{\delta}\ensuremath{\nu}(^{186}\mathrm{Hg}\ensuremath{-}^{204}\mathrm{Hg})=39.4(2)$ GHz; and $\ensuremath{\delta}\ensuremath{\nu}(^{184}\mathrm{Hg}\ensuremath{-}^{204}\mathrm{Hg})=43.1(2)$ GHz. These data combined with those obtained by $\ensuremath{\beta}$-radiation-detected optical pumping ($\ensuremath{\beta}$-RADOP) on the odd Hg isotopes yield a huge odd-even…

Charge radii of odd-A 191–211Po isotopes

2013

Isotope shifts have been measured for the odd-A polonium isotopes 191–211Po and changes in the nuclear mean square charge radii δr2 have been deduced. The measurements were performed at CERN-ISOLDE using the in-source resonance-ionization spectroscopy technique. The combined analysis of these data and our recent results for even-A polonium isotopes indicates an onset of deformation already at 197,198Po, when going away from stability. This is significantly earlier than was suggested by previous theoretical and experimental studies of the polonium isotopes. Moreover and in contrast to the mercury isotopes, where a strong odd–even staggering of the charge radii of the ground states was observ…

Blurring the boundaries between ion sources: The application of the RILIS inside a FEBIAD type ion source at ISOLDE

2016

For the first time, the laser resonance photo-ionization technique has been applied inside a FEBIAD-type ion source at an ISOL facility. This was achieved by combining the ISOLDE RILIS with the ISOLDE variant of the FEBIAD ion source (the VADIS) in a series of off-line and on-line tests at CERN. The immediate appli- cations of these developments include the coupling of the RILIS with molten targets at ISOLDE and the introduction of two new modes of FEBIAD operation: an element selective RILIS mode and a RILIS + VADIS mode for increased efficiency compared to VADIS mode operation alone. This functionality has been demonstrated off-line for gallium and barium and on-line for mercury and cadmi…