Resonance lonization mass spectroscopy with a pulsed thermal atomic beam

Krönert, U.; Becker, St.; Hilberath, Th.; Kluge, H.-J.; Schulz, Christoph

doi:10.1007/bf00624601

“…Within the energy intervals that were studied, five auto-ionising states had been previously observed [4,7], but not as resonant transitions from the excited states measured during this study. Three of the known AIS were confirmed and 27 new AIS were observed.…”

Section: Resonance Ionisation Spectroscopy Of Goldmentioning

confidence: 98%

Development of a RILIS ionisation scheme for gold at ISOLDE, CERN

Marsh

¹

,

Fedosseev

²

,

Kosuri

³

2006

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At the ISOLDE on-line isotope separation facility, the resonance ionisation laser ion source (RILIS) can be used to ionise reaction products as they effuse from the target. The RILIS process of laser step-wise resonance ionisation of atoms in a hot metal cavity provides a highly element selective stage in the preparation of the radioactive ion beam. As a result, the ISOLDE mass separators can provide beams of a chosen isotope with greatly reduced isobaric contamination. With the addition of a new three-step ionisation scheme for gold, the RILIS is now capable of ionising 26 of the elements. The optimal scheme was determined during an extensive study of the atomic energy levels and auto-ionising states of gold, carried out by means of in-source resonance ionisation spectroscopy. Details of the ionisation scheme and a summary of the spectroscopy study are presented.

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“…Experimental Set-up and Measurements : In order to study the nuclear shape of still lighter Au isotopes, the detection efficiency of our experimental set-up had to be increased significantly. This could be achieved by applying PLID in order to produce a pulsed atomic Au beam [5] instead of the continuous one used earlier [3,4]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Observation of strongly deformed ground-state configurations in184Au and183Au by laser spectroscopy

Krönert

¹

,

Becker

²

,

Bollen

³

et al. 1988

Z. Physik A - Atomic Nuclei

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Resonance ionization mass spectroscopy (RIMS) and pulsed-laser induced desorption (PLID) have been combined in order to study the isotope shift ( IS ) and hyperfine structure ( HFS ) of lS4Au ( TI/= = 53 s) and ;SSAu ( Tl12 = 42 s) in the 6s aS1/2 + 6p =P1/= (A = 267 nm) transition. The Au isotopes were obtained as daughters in the decay of ls4aSaHg produced and mass separated at the new ISOLDE-3 facility at CERN. It was found that the strong deformation f12 ~ 0.25 setting in at *SSAu persists down to lSaAu.

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“…, respectively. Of particular interest was the measurement of a previously applied ionisation scheme for gold [4]. This scheme, shown in italics in Table 1, was one of the more efficient schemes previously measured however the optimum scheme, shown on the right hand side of Fig.…”

Section: Resonance Ionisation Spectroscopy Of Goldmentioning

confidence: 99%

“…The data obtained as well as the ionisation schemes used are compiled by Saloman [3]. In particular, an efficient ionisation scheme with a three-colour, three-step excitation to an autoionising state has been used for on-line laser spectroscopy of laser-desorbed gold isotopes [4,5]. Auto-ionising (AIS) states of Au were also studied by resonance ionisation spectroscopy in [6,7].…”

mentioning

confidence: 99%

“…Auto-ionising (AIS) states of Au were also studied by resonance ionisation spectroscopy in [6,7]. Since the RILIS laser system and the conditions in the ionisation region are different from those used in [4,6,7], investigating the performance of these known schemes at the RILIS setup was necessary. In addition, the search for transitions to the auto-ionising states was carried out in these works for only a few excited states in a limited spectral range, which is not readily available at RILIS.…”

mentioning

confidence: 99%

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Development of a RILIS ionisation scheme for gold at ISOLDE, CERN

Marsh¹,

Fedosseev²,

Kosuri³

2007

Laser 2006

0

View full text Add to dashboard Cite

At the ISOLDE on-line isotope separation facility, the resonance ionisation laser ion source (RILIS) can be used to ionise reaction products as they effuse from the target. The RILIS process of laser step-wise resonance ionisation of atoms in a hot metal cavity provides a highly element selective stage in the preparation of the radioactive ion beam. As a result, the ISOLDE mass separators can provide beams of a chosen isotope with greatly reduced isobaric contamination. With the addition of a new three-step ionisation scheme for gold, the RILIS is now capable of ionising 26 of the elements. The optimal scheme was determined during an extensive study of the atomic energy levels and auto-ionising states of gold, carried out by means of in-source resonance ionisation spectroscopy. Details of the ionisation scheme and a summary of the spectroscopy study are presented.

show abstract

Resonance lonization mass spectroscopy with a pulsed thermal atomic beam

Cited by 39 publications

References 7 publications

Development of a RILIS ionisation scheme for gold at ISOLDE, CERN

Development of a RILIS ionisation scheme for gold at ISOLDE, CERN

Observation of strongly deformed ground-state configurations in184Au and183Au by laser spectroscopy

Development of a RILIS ionisation scheme for gold at ISOLDE, CERN

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