Penning trap mass measurements on nobelium isotopes

Dworschak, M.; Block, M.; Ackermann, D.; Audi, G.; Blaum, Klaus; Droese, C.; Eliseev, Sergey; Fleckenstein, T.; Haettner, E.; Herfurth, F.; Heßberger, F. P.; Hofman, F.; Ketelaer, Jens; Ketter, Jochen; Kluge, H.‐J.; Marx, G.; Mazzocco, M.; Novikov, Yu. N.; Plaß, W. R.; Popeko, A. G.; Rahaman, S.; Rodriguez, D. Rodriguez; Scheidenberger, C.; Schweikhard, L.; Thirolf, P. G.; Vorobyev, Gleb; Wang, M.; Weber, C.

doi:10.1103/physrevc.81.064312

Cited by 52 publications

(31 citation statements)

References 45 publications

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“…A breakthrough was the measurement of the nobelium (Z = 102) isotopes 252,253,254 No produced with cross sections of 2 µb (≈ 2 ions/s), 1 µb (≈ 1 ion/s) and 0.5 µb (≈ 0.5 ions/s), respectively, performed by the SHIPTRAP Collaboration at the heavy ion accelerator UNILAC and the velocity filter SHIP at GSI in Darmstadt, [8]. The mass uncertainties range from 13 keV for 253 No to 31 keV for 252 No [9]. These results represent the very first direct mass measurement above uranium and improve the knowledge of many masses of neighboring isotopes up to darmstadtium (Z = 110) due to a manifold of links.…”

Section: The Masses Of Superheavy Elementsmentioning

confidence: 99%

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A quantum sensor for high-performance mass spectrometry

Rodriguez

2011

Appl. Phys. B

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A novel device, called quantum sensor, has been conceived to measure the mass of a single ion with ultimate accuracy and unprecedented sensitivity while the ion is stored and cooled in a trap. The quantum sensor consists of a single calcium ion as sensor, which is laser cooled to mK temperatures and stored in a second trap connected to the trap for the ion under study by a common endcap. The cyclotron motion of the ion under investigation is transformed into axial motion along the magnetic field lines and coupled to the sensor ion by the image current induced in the common endcap. The axial motion of the sensor ion in turn is monitored spatially resolved by its fluorescence light. In this way the detection of phonons can be upgraded to a detection of photons. This device will allow one to overcome recent limitations in high-precision mass spectrometry.

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Section: The Masses Of Superheavy Elementsmentioning

confidence: 99%

“…Faster cooling time can be achieved if the ion under study has a higher charge state. Table 1 Time for cooling and/or energy exchange (t ex ) for different ion pairs calculated according to (9). z 0 = 0.5 mm, C = 1 pF, and ν z = 100 kHz.…”

Section: Coupling the Ion Of Interest And The Sensor Ion By Image Curmentioning

confidence: 99%

A quantum sensor for high-performance mass spectrometry

Rodriguez

2011

Appl. Phys. B

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“…EVRs extracted from the cell are bunched and injected into a first Penning trap, which provides isobaric separation, and then into a second Penning trap, in which the mass is determined with a precision of the order of 10 −7 by measuring the ion's cyclotron frequency, which is directly related to its mass. The recent measurements of 252−254 No [102,103] represent the first direct mass measurements beyond uranium and pave the way for studies into the region of the SHE. A cyclotron resonance as obtained in these studies for 254 No is displayed in Fig.…”

Section: Shiptrap At Shipmentioning

confidence: 99%

Superheavy element studies with preseparated isotopes

Düllmann¹

2011

Radiochimica Acta

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Superheavy elements / Transactinides / Physical preseparation / Recoil separatorSummary. In recent years, significant progress in the field of superheavy element research has been achieved thanks to a novel combination of techniques from different fields. This "physical preseparation" approach includes the coupling of an ancillary setup -typically a chemistry apparatus or a counting setup -to a physical recoil separator. This latter preseparator removes unwanted nuclear reaction products as well as the intense heavy-ion beam associated with superheavy element experiments and thus isolates the evaporation residues of the nuclear fusion reactions. These are guided to the separators's focal plane, where they are extracted and available for further transport to external setups, e.g., by a gas-jet. In this overview, the development of physical preseparation is described, and experimental results from nuclear chemistry and physics that were achieved with "preseparated" isotopes are summarized, with an emphasis on results relevant for superheavy element research. The covered topics range from chemical studies in the liquid as well as in the gas phase, the measurement of nuclear decay properties and of atomic masses. Preseparation was already shown to be a very powerful approach in these studies and promises to allow further progress in superheavy element research.

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“…It consists of a gas-filled stopping cell for stopping of the high energetic reaction products separated by SHIP, an RFQ cooler and buncher for cooling and accumulating the ions, and a double Penning trap system for high-precision mass measurements. The length of the apparatus from the gas cell to the channeltron detector is 4.5 m. The figure was taken from [30].…”

Section: Ion Traps Behind Recoil Separatorsmentioning

confidence: 99%

“…An example of such devices is the SHIPTRAP setup consisting of a gas-filled stopping cell, a radio-frequency quadrupole (RFQ) cooler and buncher, and a double Penning trap system [27][28][29][30]. The set-up is shown in Fig.…”

Section: Ion Traps Behind Recoil Separatorsmentioning

confidence: 99%

Synthesis of superheavy elements by cold fusion

Hofmann¹

2011

Radiochimica Acta

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131

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Summary.The new elements from Z = 107 to 112 were synthesized in cold fusion reactions based on targets of lead and bismuth. The principle physical concepts are presented which led to the application of this reaction type in search experiments for new elements. Described are the technical developments from early mechanical devices to experiments with recoil separators. An overview is given of present experiments which use cold fusion for systematic studies and synthesis of new isotopes. Perspectives are also presented for the application of cold fusion reactions in synthesis of elements beyond element 113, the so far heaviest element produced in a cold fusion reaction. Further, the transition of hot fusion to cold fusion is pointed out, which occurs in reactions for synthesis of elements near Z = 126 using actinide targets and beams of neutron rich isotopes of elements from iron to germanium.

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Penning trap mass measurements on nobelium isotopes

Cited by 52 publications

References 45 publications

A quantum sensor for high-performance mass spectrometry

A quantum sensor for high-performance mass spectrometry

Superheavy element studies with preseparated isotopes

Synthesis of superheavy elements by cold fusion

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