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排序方式: 共有199条查询结果,搜索用时 10 毫秒
51.
J. Kurpeta V. -V. Elomaa T. Eronen J. Hakala A. Jokinen P. Karvonen I. Moore H. Penttilä A. Płochocki S. Rahaman S. Rinta-Antila J. Rissanen J. Ronkainen A. Saastamoinen T. Sonoda W. Urban Ch. Weber J. Äystö 《The European Physical Journal A - Hadrons and Nuclei》2007,31(3):263-266
Exotic, neutron-rich 111Mo and 115Ru nuclei, produced in proton-induced fission of 238U target, were separated with the IGISOL mass separator. The separator was coupled to the JYFLTRAP Penning trap to select
the ions of a single, desired element out of the isobaric IGISOL beam. Monoisotopic samples of 115Ru and 111Mo ions were observed with a microchannel plate detector after the trap or were implanted on a catcher foil for gamma- and
beta-ray coincidence spectroscopy. In spite of short data taking time new gamma transitions were identified in the beta decay
of very neutron-rich 115Ru. 相似文献
52.
A. Martın D. Ackermann G. Audi K. Blaum M. Block A. Chaudhuri Z. Di S. Eliseev R. Ferrer D. Habs F. Herfurth F. P. Heßberger S. Hofmann H. -J. Kluge M. Mazzocco M. Mukherjee J. B. Neumayr Yu. Novikov W. Plaß S. Rahaman C. Rauth D. Rodrıguez C. Scheidenberger L. Schweikhard P. G. Thirolf G. Vorobjev C. Weber 《The European Physical Journal A - Hadrons and Nuclei》2007,34(4):341-348
Direct mass measurements of nuclides near to the supposed end-point region of the astrophysical rp-process were performed
at SHIPTRAP, the Penning trap mass spectrometer at GSI Darmstadt. The masses of 24 nuclides were measured with relative uncertainties
between 5 . 10-8 and 2 . 10-7 . Three of them, 107Sb , 111I and 112I , were determined experimentally for the first time. The data analysis and mass evaluation are presented in detail. 相似文献
53.
Chandrasekhar V Rahaman SM Hajra T Das D Ghatak T Rafiq S Sen P Bera JK 《Chemical communications (Cambridge, England)》2011,47(38):10836-10838
The trinuclear complex [{Ir(ppy)(2)}(3)(L(1))(2)](OTf)(3) (1) is a bright red luminophore whereas the monomer [Ir(ppy)(2)L(2)](OTf) (2) exhibits emission in the green region. 相似文献
54.
Saibal Ray Utpal Mukhopadhyay Farook Rahaman Ruby Sarkar 《International Journal of Theoretical Physics》2013,52(12):4524-4536
Dark matter, the major component of the matter content of the Universe, played a significant role at early stages during structure formation. But at present the Universe is dark energy dominated as well as accelerating. Here, the presence of dark energy has been established by including a time-dependent Λ term in the Einstein’s field equations. This model is compatible with the idea of an accelerating Universe so far as the value of the deceleration parameter is concerned. Possibility of a change in sign of the deceleration parameter is also discussed. The impact of considering the speed of light as variable in the field equations has also been investigated by using a well known time-dependent Λ model. 相似文献
55.
Algora A Jordan D Taín JL Rubio B Agramunt J Perez-Cerdan AB Molina F Caballero L Nácher E Krasznahorkay A Hunyadi MD Gulyás J Vitéz A Csatlós M Csige L Aysto J Penttilä H Moore ID Eronen T Jokinen A Nieminen A Hakala J Karvonen P Kankainen A Saastamoinen A Rissanen J Kessler T Weber C Ronkainen J Rahaman S Elomaa V Rinta-Antila S Hager U Sonoda T Burkard K Hüller W Batist L Gelletly W Nichols AL Yoshida T Sonzogni AA Peräjärvi K 《Physical review letters》2010,105(20):202501
The β feeding probability of (102,104,105,106,107)Tc, 105Mo, and 101Nb nuclei, which are important contributors to the decay heat in nuclear reactors, has been measured using the total absorption technique. We have coupled for the first time a total absorption spectrometer to a Penning trap in order to obtain sources of very high isobaric purity. Our results solve a significant part of a long-standing discrepancy in the γ component of the decay heat for 239Pu in the 4-3000 s range. 相似文献
56.
57.
Eronen T Elomaa VV Hager U Hakala J Hardy JC Jokinen A Kankainen A Moore ID Penttilä H Rahaman S Rinta-Antila S Rissanen J Saastamoinen A Sonoda T Weber C Aystö J 《Physical review letters》2008,100(13):132502
Using a new fast cleaning procedure to prepare isomerically pure ion samples, we have measured the beta-decay Q(EC) values of the superallowed beta emitters 5(0)Mn and (54)Co to be 7634.48(7) and 8244.54(10) keV, respectively, results which differ significantly from the previously accepted values. The corrected Ft values derived from our results strongly support new isospin-symmetry-breaking corrections that lead to a higher value of the up-down quark mixing element V(ud) and improved confirmation of the unitarity of the Cabibbo-Kobayashi-Maskawa matrix. 相似文献
58.
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60.
Habibur Rahaman 《Tetrahedron letters》2008,49(40):5789-5792
The synthesis of tricyclic lactam building blocks by the radical addition-cyclization-elimination (RACE) reaction is presented. A range of oxime ethers carrying unsaturated ester part have been tested for the radical reaction. A variety of substituents were incorporated around the aromatic backbones and their effect on the RACE reaction has been examined. In addition, the power of RACE reaction is demonstrated by preparation of a key intermediate for the synthesis of constrained analogue of methoctramine. 相似文献