Absolute transmission and separation properties of the gas-filled recoil separator RITU

Sarén, J.; Uusitalo, J.; Leino, M.; Sorri, J.

doi:10.1016/j.nima.2011.06.068

Cited by 71 publications

(52 citation statements)

References 14 publications

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“…The ERs recoiling out of the target were separated from primary beam and target-like products by the gasfilled recoil separator ritu [9,10] according to their magnetic rigidities. A carbon foil of thickness 0.04 mg/cm 2 was used as a charge-reset foil on the downstream side of the target to allow for a better separation of the primary beam from the ERs.…”

Section: Experimental Setup and Methodsmentioning

confidence: 99%

In-beam spectroscopic study of Cf244

Konki¹,

Sulignano²,

Greenlees³

et al. 2018

Phys. Rev. C

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The ground-state rotational band of the neutron-deficient californium (Z = 98) isotope 244 Cf was identified for the first time and measured up to a tentative spin and parity of I π = 20 + . The observation of the rotational band indicates that the nucleus is deformed. The kinematic and dynamic moments of inertia were deduced from the measured γ-ray transition energies. The behaviour of the dynamic moment of inertia revealed an up-bend due to a possible alignment of coupled nucleons in high-j orbitals starting at a rotational frequency of abouthω = 0.20 MeV. The results were compared to the systematic behaviour of the even-even N = 146 isotones as well as to available theoretical calculations that have been performed for nuclei in the region.

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Section: Experimental Setup and Methodsmentioning

confidence: 99%

In-beam spectroscopic study of Cf244

Konki¹,

Sulignano²,

Greenlees³

et al. 2018

Phys. Rev. C

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“…Prompt γ rays were detected at the target position by the JUROGAM array, which comprised 43 Compton-suppressed high-purity germanium detectors, with a total photopeak efficiency of 4.2% at 1.33 MeV [11]. The evaporation residues were separated from the unreacted beam by the Recoil Ion Transport Unit (RITU) separator [12,13] and were implanted into an aluminium stopper foil at the focal plane where the Gamma-Recoil-Electron-Alpha-Tagging (GREAT) spectrometer was located [14]. These recoiling nuclei were identified on the basis of energy loss and time of flight (ToF) as they passed through a dual multiwire proportional counter (MWPC) system at the entrance of GREAT.…”

Section: Methodsmentioning

confidence: 99%

Level structure above the 17+ isomeric state in Tm8369152

Singh¹,

Cullen²,

Taylor³

et al. 2018

Phys. Rev. C

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Excited states above the 17 + isomeric state in the proton-rich nucleus 152 Tm were established by employing the recoil-isomer tagging technique. Data were collected using the JUROGAM gamma-ray array and the GREAT spectrometer together with the recoil ion transport unit (RITU) gas-filled recoil separator and analyzed to identify the prompt and delayed γ decays from the levels in 152 Tm. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the π 0h 11/2 orbital and one neutron in the ν1f 7/2 orbital, agree with the observed energies of the yrast levels up to angular momentum J = 21. The observation of near degeneracies in the energy spectrum can be attributed to specific components of the proton-neutron interaction. The isomeric decay of the 17 + level is not reproduced in the shell-model calculations as it arises from a delicate balance between hindrance due to seniority selection rules and enhancement due to configuration mixing.

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“…Prompt γ rays were detected at the target position by the JUROGAM γ -ray spectrometer [13] comprising 43 EUROGAM-type escape-suppressed HPGe detectors [14]. Recoiling fusion-evaporation residues were separated from fission products and scattered beam by the RITU gas-filled recoil separator [15,16] and deposited in the double-sided silicon strip detectors (DSSDs) of the GREAT spectrometer [17] at the separator's focal plane. All detector signals from the JUROGAM and GREAT spectrometers were passed to the total data readout acquisition system [18], where they were time stamped with a precision of 10 ns.…”

Section: Methodsmentioning

confidence: 99%

Collective excitations in the transitional nucleiRe163andRe165

et al. 2015

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, 3p2nγ ) fusion-evaporation reactions at bombarding energies of 270 and 380 MeV, respectively. γ rays were detected at the target position using the JUROGAM spectrometer while recoiling ions were separated in-flight by the RITU gas-filled recoil separator and implanted in the GREAT spectrometer. The energy level schemes for 163 Re and 165 Re were identified using recoil-decay correlation techniques. At low spin, the yrast bands of these isotopes consist of signature partner bands based on a single πh 11/2 quasiproton configuration. The bands display large energy splitting consistent with the soft triaxial shape typical of transitional nuclei above N = 82. The configurations of the excited states are proposed within the framework of the cranked shell model.

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Absolute transmission and separation properties of the gas-filled recoil separator RITU

Cited by 71 publications

References 14 publications

In-beam spectroscopic study of Cf244

In-beam spectroscopic study of Cf244

Level structure above the 17+ isomeric state in Tm8369152

Collective excitations in the transitional nucleiRe163andRe165

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