Laser spectroscopy investigation of the nuclear moments and radii of lutetium isotopes

Georg, U.; Borchers, W.; Keim, M.; Klein, Alexander; Lievens, Peter; Neugart, R.; Neuroth, M; Rao, P. Mohan; Schulz, Christoph

doi:10.1007/s100500050172

Cited by 70 publications

(12 citation statements)

References 28 publications

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“…The results are displayed in figure 1 and compared with the Yb [8] and Lu [9] chains. The hafnium results, which have been discussed by Levins et al [5], agree well with the quadrupole deformation predictions of M611er et al [7].…”

Section: Results For Hafnium Isotopes and Isomersmentioning

confidence: 99%

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Laser spectroscopy of radioisotopes and isomers at the igisol facility, Jyväskylä

et al. 2000

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We report on the progress of the collinear laser spectroscopy programme at the IGISOL isotope separator in Jyv~kyl~i. The sensitivity of the photon-ion coincidence tecnique has been sufficient to measure isotope shifts and hyperfine structures of light hafnium isotopes produced in 175Lu(p,xn) reactions. A gas-filled RF quadrupole has recently been installed in the beamline to reduce the energy spread and emittance of the ion beam. It is expected to increase the sensitivity of the laser technique by at least an order of magnitude, allowing measurements on a number of high-spin isomers in the hafnium chain. Status of the laser programme at the IGISOLOur laser collaboration decided to base its research programme at the IGISOL facility in Jyv/iskyl~ for two reasons. Firstly, the radioactive beam fluxes suited our ion-photon coincidence technique [1], which had been developed at the Daresbury Laboratory Nuclear Structure Facility. Secondly, it would allow refractory elements and millisecond isomers to be studied on-line for the first time.Considerable development work and effort were needed to adapt the IGISOL ion beam properties to the requirements of the laser technique, and it was three years before a resonance of a refractory radioisotope was observed. This was on the 327.6nm transition in the 8SZr+ ion produced in the sgy(p,2n) reaction with a 25 MeV proton beam of 15 #A. The ion beam flux was 12,000 ions/sec, of which approximately 8,000 ions/sec were SSZr. During the development time, four problem areas were identified: (i) the energy spread of the IGISOL ion beam increased rapidly with the voltage on the skimmer plate [2] and a compromise in ion source efficiency was necessary to limit it; (ii) background beams of isobaric contaminants (molecular ions) could give unacceptably high counting rates in the ion detector, increasing the random rate in the coincidence system. These beams could be significantly reduced by baking and conditioning the IGISOL chamber before use, and running with more effective cooling; (iii) off-line laser fluorescence tests showed that many ionic metastable states were populated in the ion source (in this case, from

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Section: Results For Hafnium Isotopes and Isomersmentioning

confidence: 99%

“…Change in mean square charge radii for the Yb [8], Lu [9] and Hf [5,10,11] isotope chains. The relative positions of the chains are arbitrary.…”

Section: Neutron Numbermentioning

confidence: 99%

Laser spectroscopy of radioisotopes and isomers at the igisol facility, Jyväskylä

et al. 2000

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“…Для каждой схемы указаны ближайшие по частотам каналы возбуждения изотопов 175 Lu, 176 Lu, 177m Lu и частотные расстояния до 177 Lu на всех ступенях ионизации. Для 177m Lu приведена расчетная оценка для первой ступени с погрешностью ±160 MHz [5]. Step 1…”

Section: обсуждение результатовunclassified

“…Энергия, изотопические сдвиги и константы сверхтонкого расщепления уровней схемы фотоионизации для 175 Lu, 176 Lu, 177 Lu, 177mLu. Символом * отмечена расчетная оценка согласно[5]…”

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Исследование схемы селективной фотоионизации -=SUP=-177-=/SUP=-Lu

Дьячков¹,

Горкунов²,

Labozin³

et al. 2019

Журнал Технической Физики

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The hyperfine structure of transitions in the three-step scheme 5 d 6 s ^22 D _3/2–5 d 6 s 6 p ^4 F $$_{{5/2}}^{^\circ }$$ –5 d 6 s 7 s ^4 D _3/2– (53 375 cm^–1) $$_{{1/2}}^{^\circ }$$ of lutetium ionization is studied for ^175Lu, ^176Lu, and ^177Lu isotopes using the photoionization laser spectroscopy method. Values of the magnetic dipole ( A ) and electric quadrupole ( B ) interaction constants are determined, as well as the energies, the isotope shifts, and the radiative lifetimes for the 5 d 6 s 7 s ^4 D _3/2 and (53 375 cm^–1) $$_{{1/2}}^{^\circ }$$ levels.

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“…Полученные значения моментов ядра 177m Lu (табл. 2) хорошо совпали с результатами из последних работ [9,17].…”

Section: Introductionunclassified

Исследование лазерной фотоионизации ядерного изомера -=SUP=-177m-=/SUP=-Lu

Дьячков¹,

Горкунов²,

Лабозин³

et al. 2020

Журнал Технической Физики

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Впервые методом лазерной резонансной фотоионизационной спектроскопии исследована сверхтонкая структура переходов трехступенчатой схемы фотоионизации лютеция 5d6s2 2D3/2--5d6s6p4Fo5/2-- 5d6s7s4D3/2--(53375 cm-1)o1/2 для ядерного изомера 177mLu. В результате определены константы сверхтонкого расщепления и энергии уровней, а также магнитный дипольный и электрический квадрупольный моменты ядра 177mLu. Исследованы изотопические сдвиги спектральных линий изомера по отношению к природным изотопам и 177Lu. Ключевые слова: изотопический сдвиг, сверхтонкая структура, квадрупольный момент.

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Laser spectroscopy investigation of the nuclear moments and radii of lutetium isotopes

Cited by 70 publications

References 28 publications

Laser spectroscopy of radioisotopes and isomers at the igisol facility, Jyväskylä

Laser spectroscopy of radioisotopes and isomers at the igisol facility, Jyväskylä

Исследование схемы селективной фотоионизации -=SUP=-177-=/SUP=-Lu

Исследование лазерной фотоионизации ядерного изомера -=SUP=-177m-=/SUP=-Lu

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