Search results for "Atomic weights"

showing 3 items of 3 documents

Enseñanza de las ciencias : revista de investigación y experiencias didácticas

2003

Se discuten algunas de las conclusiones de varios trabajos históricos recientes sobre Amedeo Avogadro y la teoría atómica del siglo XIX. A través de pequeños extractos de publicaciones famosas de Avogadro, se analizan las características principales de sus aportaciones a la teoría atómica del siglo XIX. También se analizan los principales métodos de cálculo de pesos atómicos de esos años y se discute el papel de las ideas de Avogadro en este tema. Estas conclusiones se contrastan con la imagen que actualmente los libros de texto dan acerca de este autor. Finalmente, esta última comparación conduce a una discusión sobre el papel de la historia de la ciencia en los libros de texto. This paper…

Atomismmedia_common.quotation_subjectPesos atómicosAvogadro's hypothesesArtScientific textbooksAtomismoEducationsymbols.namesakeHipótesis de AvogadroAtomism (social)Libros de textoAtomic weightsAvogadro constantsymbolsComparative historical researchhistoria de la ciencia y de las humanidadeslibro de textoHumanitiesCartographyAvogadro Amedeomedia_common
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QEC value of the superallowed β emitter 42Sc

2017

The QEC value of the superallowed β+ emitter Sc42 has been measured with the JYFLTRAP Penning-trap mass spectrometer at the University of Jyväskylä to be 6426.350(53) keV. This result is at least a factor of four more precise than all previous measurements, which were also inconsistent with one another. As a byproduct we determine the excitation energy of the 7+ isomeric state in Sc42 to be 616.762(46) keV, which deviates by 8σ from the previous measurement. peerReviewed

Ion Traps (Instrumentation)astrofysiikkasuperallowed emittersAntiprotonsAtomic Weightsydinfysiikkaatomipainot
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High-precision mass measurements for the rp-process at JYFLTRAP

2017

The double Penning trap JYFLTRAP at the University of Jyvaskyla has been successfully used to achieve high-precision mass measurements of nuclei involved in the rapid proton-capture (rp) process. A precise mass measurement of 31 Cl is essential to estimate the waiting point condition of 30 S in the rp-process occurring in type I x-ray bursts (XRBs). The mass-excess of 31 C1 measured at JYFLTRAP, -7034.7(3.4) keV, is 15 more precise than the value given in the Atomic Mass Evaluation 2012. The proton separation energy S p determined from the new mass-excess value confirmed that 30 S is a waiting point, with a lower-temperature limit of 0.44 GK. The mass of 52 Co effects both 51 Fe( p,γ ) 52 C…

PhysicsIon Traps (Instrumentation)protonitProtonta114protons010308 nuclear & particles physicsPhysicsQC1-999Analytical chemistryAntiprotonsrp-processPenning trapatomipainot01 natural sciencesMass measurementAtomic massnukleonitnucleons0103 physical sciencesmassamass010306 general physicsAtomic Weights
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