In-beam electron spectrometer used in conjunction with a gas-filled recoil separator

Kankaanpää, H.; Butler, P. A.; Greenlees, P. T.; Bastin, J. E.; Herzberg, R.‐D.; Humphreys, R. D.; Jones, G.D.; Jones, P. M.; Julin, R.; Keenan, A.; Kettunen, H.; Leino, M.; Miettinen, L.; Page, T.; Rahkila, P.; Scholey, C.; Uusitalo, J.

doi:10.1016/j.nima.2004.06.149

Cited by 26 publications

(8 citation statements)

References 18 publications

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“…An average beam current of 2 particle nA was delivered for 160 hours at a beam energy of 168 MeV. Prompt conversion electrons were detected at the target position by the Silicon Array for Conversion Electron Detection (SACRED) spectrometer [23,24], which was mounted at an angle of 177.5 • to the beam direction. The conversion electrons emitted in the backward direction were transported by a solenoidal magnetic field to a 500-μm thick, 25-element segmented silicon detector that was used to measure their energies.…”

Section: Methodsmentioning

confidence: 99%

In-beam conversion-electron spectroscopy of180Hg

Page¹,

Andreyev²,

Wiseman³

et al. 2011

Phys. Rev. C

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Excited states in 180 Hg were populated using the 147 Sm( 36 Ar,3n) 180 Hg reaction and studied by in-beam conversion-electron spectroscopy. Conversion electrons emitted at the target position were measured using the Silicon Array for Conversion Electron Detection (SACRED) spectrometer and tagged through the characteristic α decays of 180 Hg detected in a position-sensitive silicon strip detector located at the focal plane of the gas-filled recoil separator Recoil Ion Transport Unit (RITU). Electron conversion of transitions previously assigned to 180 Hg through in-beam γ -ray spectroscopy studies was identified up to the 10 + → 8 + transition and the intensities of the conversion-electron transitions were found to be consistent with the previous multipolarity assignments. Evidence was also found for two highly converted transitions in 180 Hg: a 167 keV transition is interpreted as the transition from the newly identified 2 + 2 state at 601 keV to the 2 + 1 state at 434 keV, while a 420 keV transition is assigned as the E0 decay from the 0 + bandhead of the prolate-deformed configuration to the weakly deformed ground state.

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Section: Methodsmentioning

confidence: 99%

In-beam conversion-electron spectroscopy of180Hg

Page¹,

Andreyev²,

Wiseman³

et al. 2011

Phys. Rev. C

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“…In case of ELLI separated beam enters at a steep 45 degree angle through the gap between the two coils arranged in the Helmholtz configuration. This novel idea, invented for ELLI, of the beam entering at an oblique angle with respect to the symmetry axis of the magnetic field has been subsequently adopted by SACRED [10] and SAGE [11] spectrometers.…”

Section: Elli Spectrometermentioning

confidence: 99%

Conversion electron spectroscopy at IGISOL

Rinta‐Antila

Trzaska

Rissanen

2012

Three Decades of Research Using IGISOL Technique at the University of Jyväskylä

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Conversion elecron spectroscopy has been an important part of the nuclear spectrocopy research at the Department of Physics of the University of Jyväskylä since the commissioning of the first cyclotron in the mid 1970s. At the IGISOL facility a specialiced conversion electron spectrometer ELLI was developed in the late 1980s. The first results with ELLI were obtained using the beams from the old MC-20 cyclotron to study newly discovered isotopes of refractory fission products. In the present K130 cyclotron laboratory ELLI has been utilized in many decay-spectroscopy experiments both neutron-deficient and neutron-rich side of the valley of stability. In the early 2000s the new JYFLTRAP ion trap system overthrew ELLI from its permanent place in the IGISOL beamline. Conversion electron spectroscopy has continued with the new Penning trap that has been used in in-trap electron spectroscopy tests and post-trap electron spectroscopy is foreseen.Keywords Conversion electron spectroscopy · On-line mass separator · Trap-assisted spectroscopy IntroductionNuclear spectroscopy was the dominant research line at the Department of Physics, University of Jyväskylä (JYFL) already in the early days of the accelerator physics there. In that respect JYFL was basically following the world-wide boom made possible by the availability of commercial germanium detectors. However, what set JYFL apart, already at that time, was the equal research effort devoted to the electron spectroscopy. For instance, during the first full year of operation of the MC-20 cyclotron (1976) 60 of the total of 167 days of beam on target (36%) were used for in-beam gamma-ray spectroscopy

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“…However, such filters do not eliminate high energy positrons. 6 The γ -ray background, which is rather low due to the large target-to-detector distance, can be additionally reduced if a lead block is placed in between.…”

Section: Introductionmentioning

confidence: 99%

“…We combined both types of geometry of magnetic fields in our old 6 and new conversion-electron spectrometers. In both constructions permanent magnets were used for selection and transportation of electrons.…”

Section: Introductionmentioning

confidence: 99%

University of Lodz an electron spectrometer—A new conversion-electron spectrometer for “in-beam” measurements

Perkowski

Andrzejewski

Janiak

et al. 2014

Review of Scientific Instruments

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The designed and constructed at the University of Lodz an electron spectrometer is devoted to "in-beam" measurements. The apparatus is characterized by high efficiency up to 9%, good energy resolution (FWHM = 5 keV at 482 keV) and, what is very important good suppression of delta electrons, positrons, and photons emitted by the targets. This achievement was obtained using a combination of magnetic field in two different layouts: perpendicular and parallel to the axis of the spectrometer being orthogonal to the beamline. The conversion-electron spectrometer coupled to the EAGLE array was successfully tested in an "in-beam" measurement.

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In-beam electron spectrometer used in conjunction with a gas-filled recoil separator

Cited by 26 publications

References 18 publications

In-beam conversion-electron spectroscopy of180Hg

In-beam conversion-electron spectroscopy of180Hg

Conversion electron spectroscopy at IGISOL

University of Lodz an electron spectrometer—A new conversion-electron spectrometer for “in-beam” measurements

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