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Sökning: WFRF:(Jeppsson B)

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  • Khuyagbaatar, J., et al. (författare)
  • Fission in the landscape of heaviest elements: Some recent examples
  • 2016
  • Ingår i: Nobel Symposium NS 160 – Chemistry and Physics of Heavy and Superheavy Elements. - : EDP Sciences. - 9782759890118 ; 131
  • Konferensbidrag (refereegranskat)abstract
    • The fission process still remains a main factor that determines the stability of the atomic nucleus of heaviest elements. Fission half-lives vary over a wide range, 10^−19 to 10^24 s. Present experimental techniques for the synthesis of the superheavy elements that usually measure α-decay chains are sensitive only in a limited range of half-lives, often 10^5 to 10^3 s. In the past years, measurement techniques for very short-lived and very long-lived nuclei were significantly improved at the gas-filled recoil separator TASCA at GSI Darmstadt. Recently, several experimental studies of fission-related phenomena have successfully been performed. In this paper, results on 254−256Rf and 266Lr are presented and corresponding factors for retarding the fission process are discussed.
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  • Khuyagbaatar, J., et al. (författare)
  • New Short-Lived Isotope 221U and the Mass Surface Near N=126
  • 2015
  • Ingår i: Physical Review Letters. - 1079-7114. ; 115:24
  • Tidskriftsartikel (refereegranskat)abstract
    • Two short-lived isotopes 221U and 222U were produced as evaporation residues in the fusion reaction 50Ti+176Yb at the gas-filled recoil separator TASCA. An α decay with an energy of Eα=9.31(5) MeV and half-life T1/2=4.7(7) μs was attributed to 222U. The new isotope 221U was identified in α-decay chains starting with Eα=9.71(5) MeV and T1/2=0.66(14) μs leading to known daughters. Synthesis and detection of these unstable heavy nuclei and their descendants were achieved thanks to a fast data readout system. The evolution of the N=126 shell closure and its influence on the stability of uranium isotopes are discussed within the framework of α-decay reduced width.
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  • Ohlsson, B., et al. (författare)
  • Dearterialization of colorectal liver cancer : Institutional experience
  • 1999
  • Ingår i: Digestive Surgery. - : S. Karger AG. - 0253-4886 .- 1421-9883. ; 16:3, s. 229-235
  • Tidskriftsartikel (refereegranskat)abstract
    • Background/Aims: Preliminary clinical trials have suggested that dearterialization (interruption of arterial blood supply) is beneficial to patients with liver tumours. The aim of this report was to review the outcome of all patients undergoing dearterialization for colorectal liver metastases and to analyze whether refinement of the technique was followed by improvement in outcome. Methods: Retrospective review of 57 patients undergoing temporary (16 h) dearterialization during 1972-1984 (n = 24) or repeated transient dearterialization (1-2 h once or twice daily) during 1985-1995 (n = 33). Results: The median survival after start of treatment was 1.1 years, and the 5-year survival rate was 0%. There was no significant difference in survival between temporary and repeated transient dearterialization. Liver tumour volume and extrahepatic metastases varied negatively with survival. The temporary dearterialization procedure was followed by hepatic or intra-abdominal abscess formation in 6 patients (24%), leading to postoperative death in 2 patients (operative mortality 8%). Complications after repeated transient dearterialization were related mainly to technical problems with the occluder device. Conclusion: Although this was not a randomized study, it appears that dearterialization is of no benefit in colorectal liver cancer.
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  • Bengmark, S., et al. (författare)
  • NEUESTER STAND DER LEBERCHIRURGIE
  • 1982
  • Ingår i: Zentralblatt fur Chirurgie. - 0044-409X. ; 107:12, s. 689-696
  • Tidskriftsartikel (refereegranskat)
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