排序方式: 共有28条查询结果,搜索用时 62 毫秒
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C. Magron Ph. Alfaurt B. Blank L. Daudin T. Eronen M. Gerbaux J. Giovinazzo D. Gorelov S. Grévy H. Guérin J. Hakala V. S. Kolhinen J. Koponen T. Kurtukian Nieto I. D. Moore H. Penttilä I. Pohjalainen J. Reinikainen M. Reponen S. Rinta-Antila M. Roche A. de Roubin N. Smirnova B. Thomas A. Voss L. Xayavong 《The European Physical Journal A - Hadrons and Nuclei》2017,53(4):77
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V.S. Kolhinen T. EronenD. Gorelov J. HakalaA. Jokinen A. KankainenJ. Rissanen J. SuhonenJ. Äystö 《Physics letters. [Part B]》2011
The double-electron-capture Q value for the 136Ce decay to 136Ba has been determined at JYFLTRAP. The measured value 2378.53(27) keV excludes the energy degeneracy with the 0+ excited state of the decay daughter 136Ba at 2315.32(7) keV in a resonant 0νECEC decay by 11.67 keV. The new Q value differs from the old adopted value 2419(13) keV (Atomic Mass Evaluation 2003) by 40 keV and is 50 times more precise. Our calculations show that the precise Q value renders the resonant 0νECEC decay of 136Ce undetectable by the future underground detectors. We measured also the double-β decay Q value of 136Xe to be 2457.86(48) keV which agrees well with the value 2457.83(37) keV measured at the Florida State University. 相似文献
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V.S. Kolhinen V.-V. Elomaa T. Eronen J. Hakala A. Jokinen M. Kortelainen J. Suhonen J. Äystö 《Physics letters. [Part B]》2010
The Q value of the neutrinoless double-electron-capture (0νECEC) decay of 74Se was measured by using the JYFLTRAP Penning trap. The determined value is 1209.169(49) keV, which practically excludes the possibility of a complete energy degeneracy with the second 2+ state (1204.205(7) keV) of 74Ge in a resonant 0νECEC decay. We have also computed the associated nuclear matrix element by using a microscopic nuclear model with realistic two-nucleon interactions. The computed matrix element is found to be quite small. The failure of the resonant condition, combined with the small nuclear matrix element and needed p-wave capture, suppresses the decay rate strongly and thus excludes 74Se as a possible candidate to search for resonant 0νECEC processes. 相似文献
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G. Canchel R. Béraud E. Chabanat A. Emsallem N. Redon P. Dendooven J. Huikari A. Jokinen V. Kolhinen G. Lhersonneau M. Oinonen A. Nieminen H. Penttilä K. Peräjärvi J.C. Wang J. Äystö 《The European Physical Journal A - Hadrons and Nuclei》1999,5(1):1-2
Levels in 125La have been studied via #+/EC decay of on-line mass-separated 125Ce using the HIGISOL technique. A new (390 - 40) ms isomer is definitely attributed to 125La by conversion electron measurements of the 107 keV E3 isomeric transition. 相似文献
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The scale dependent nuclear effects in parton distributions for practical applications 总被引:7,自引:0,他引:7
K.J. Eskola V.J. Kolhinen C.A. Salgado 《The European Physical Journal C - Particles and Fields》1999,9(1):61-68
The scale dependence of the ratios of parton distributions in a proton of a nucleus A and in the free proton, , is studied within the framework of the lowest order leading-twist DGLAP evolution. By evolving the initial nuclear distributions
obtained with the GRV-LO and CTEQ4L sets at a scale , we show that the ratios are only moderately sensitive to the choice of a specific modern set of free parton distributions. We propose that to a good
first approximation, this parton distribution set-dependence of the nuclear ratios can be neglected in practical applications. With this result, we offer a numerical parametrization of for all parton flavours i in any , and at any and any for computing cross sections of hard processes in nuclear collisions.
Received: 10 August 1998 / Published online: 27 April 1999 相似文献
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J. Szerypo V. S. Kolhinen M. Bussmann E. Gartzke D. Habs J. Neumayr U. Schramm C. Schürmann M. Sewtz P. G. Thirolf 《The European Physical Journal A - Hadrons and Nuclei》2009,42(3):319-322
The MLLTRAP at the Maier-Leibnitz-Laboratory (Garching) is a new Penning trap facility designed to combine several novel technologies
to decelerate, charge breed, cool, bunch and purify the reaction products and perform high-accuracy nuclear and atomic mass
measurements. It is now in the commissioning phase, achieving a mass-resolving power of about 105 in the purification trap for stable ions. 相似文献
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R. Béraud G. Canchel A. Emsallem P. Dendooven J. Huikari W. Huang Y. Wang K. Peräjärvi S. Rinta-Antila A. Jokinen V. S. Kolhinen A. Nieminen H. Penttilä J. Szerypo J. Äystö B. Bruyneel A. Popov 《Hyperfine Interactions》2001,132(1-4):481-486
A new HIGISOL chamber devoted to the study of short-lived products from heavy-ion-induced fusion-evaporation reactions is
proposed. It enables, via the extraction of ions by means of a SPIG (SextuPole rf Ion Guide), to improve the mass resolving
power by a factor 2.5 compared to the previous system using a skimmer-ring assembly. The gas cell was also equiped with an
electric field for faster transportation of recoiling ions to the nozzle where they are ejected with the gas jet. The first
results obtained both with a radioactive α-source and cyclotron beam will be reported.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献