The ion guide isotope separator on-line, IGISOL

Ärje, J.; Äystö, J.; Hyvönen, Hanna; Taskinen, P.; Koponen, V.; Honkanen, J.; Valli, K.; Hautojärvi, Α.; Vierinen, K.

doi:10.1016/0168-9002(86)90404-3

Cited by 67 publications

(11 citation statements)

References 22 publications

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“…In IGISOL systems (ion-guide isotope separator on-line) the recoil ions are thermalized in helium and transported in ionic form into the acceleration chamber of an isotope separator [39]. Like in case of He-jets this technique is well suited for separation of light ion induced reaction products.…”

Section: B On-line Isotope Separatorsmentioning

confidence: 99%

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Proton Radioactivity

Hofmann

1995

Radiochimca Acta

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The stability line for neutron deficient nuclei will be determined by radioactive emission of protons. The presently known cases are reviewed, and experimental techniques for production and investigation of proton emitters are described. The emission probabilities are discussed within a semiclassical model.(1) M, are the atomic masses including electrons, m, are the masses of the elementary particles. If we use binding energies, the Q p value is simply:z = (ZM H + Nm" -M z )c 2 . (2, 3) Brought to you by | University of St Andrews Scotland Authenticated Download Date | 6/16/15 8:31 AM

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Section: B On-line Isotope Separatorsmentioning

confidence: 99%

“…Among the heavier elements 39 Sc, 42 V, and 55 Cu are predicted to be proton unbound by 590, 190, and 290 keV [86], respectively. Their shell model configurations should be simply f 7/2 ,fi/ 2 , and p\ n and proton transition probabilities should be directly comparable to theory.…”

Section: B Neutron-deficient Light Nuclei (Z < 50)mentioning

confidence: 99%

Proton Radioactivity

Hofmann

1995

Radiochimca Acta

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“…2. The ordinary ion guide system has been used for a kind of a target ion-source unit of an isotope separator on-line (IGISOL) [10]. Reaction products recoiling out from the target are mostly in singly charged state when stopped in the He gas and extracted to the vacuum.…”

Section: Principlementioning

confidence: 99%

“…(8) and split the motion of an ion into a slow average motion T and a small oscillation motion p(t) as r = e+ p(t) = F + cErf(r) cos(Qt + 3). (10) The coefficient c is deduced by inserting the derivative of Eq. (10) …”

Section: Simulationmentioning

confidence: 99%

Development of an RF ion guide for trapping energetic radioactive nuclear ions

Wada¹,

Ishida²,

Nakamura³

et al. 2002

AIP Conference Proceedings

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Abstract. Although the projectile fragment separator (RIPS) at the RIKEN accelerator facility (RARF) provides wide variety of energetic radioactive beams, it is not adequate for lov energy beam experiments such as precision spectroscopy of trapped ions. Aiming for an efficient deceleration and cooling of energetic radioactive ions, the development of an rf ion guide system which comprises a large He gas cell and an rf funnel structure in the cell is under progress.A proof of the principle (pop) machine has been successfully tested on-line for collection of 70-MeV/u 81I ions. A compact gas cell of 70 cm in length and 10 cm in diameter with a He gas pressure of 30 Torr was placed after a variable wedge shaped energy degrader. The ions were stopped in the gas and were transported by a superposition of dc and rf electric field toward a small exit hole. The overall efficiency was 10-which can be separated into a gas stopping efficiency of 0.43 % and an ion-guide efficiency of 2.4 %. The former is limited by the volume of the cell and the pressure of the He gas. The latter is due to the present rf voltage limitation of 40 V. Both efficiency could be increased up to 10 % range by larger cell, higher pressure, and higher rf voltage, which would yield an expected overall efficiency of 1 %.

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“…The proximity to the doubly-magic 208 Pb isotope means the bismuth core will be spherical, and there are a few excellent cases in the system that will be attempted at the IGISOL facility, Jyväskylä. The 207 Bi (21/2 + ) 3-qp isomer has a lifetime of only 182 μs, however it has been extracted from the IGISOL previously with a usable efficiency of 0.5% [4]. Two other, slightly less challenging, isomers are of interest: 204 Bi (10 − , 17 + ) isomers with lifetimes of 13 and 1.07 ms, respectively.…”

mentioning

confidence: 99%

Resonance ionization spectroscopy of bismuth at the IGISOL facility

et al. 2006

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A programme of research has commenced at the IGISOL facility, Jyväskylä, combining the technique of resonance ionization spectroscopy with the development of the highly selective laser ion source trap (LIST). The first element of interest is bismuth, which contains three isomers of multi-quasiparticle states in near-spherical nuclei, namely 207 Bi (21/2 + , 182 μs), 204 Bi (10 − , 13 ms) and 204 Bi (17 + , 1.07 ms). A measurement of the optical isomer shift provides a direct comparison of the mean−square charge radii between the isomer and the nuclear ground state. Due to the short isomer lifetimes the spectroscopy will be done either within the ion guide or in a sextupole ion beam guide (SPIG), located after the ion guide and used in the development of the LIST. A mixed dye-Ti:Sapphire laser ionization scheme has been successfully tested for bismuth and first off-line results have been obtained.

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The ion guide isotope separator on-line, IGISOL

Cited by 67 publications

References 22 publications

Proton Radioactivity

Proton Radioactivity

Development of an RF ion guide for trapping energetic radioactive nuclear ions

Resonance ionization spectroscopy of bismuth at the IGISOL facility

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