搜索结果: 46-60 共查到“理学 Elements”相关记录203条 . 查询时间(0.203 秒)
Uncertainties in nuclear transition matrix elements for neutrinoless $ββ$ decay II: the heavy Majorana neutrino mass mechanism
matrix elements neutrino mass mechanism
2011/7/20
Employing four different parametrization of the pairing plus multipolar type of effective two-body interaction and three different parametrizations of Jastrow-type of short range correlations, the unc...
Spectral distribution method for neutrinoless double-beta decay nuclear transition matrix elements: Binary correlation results
neutrinoless double-beta decay nuclear transition
2011/7/20
Neutrinoless double-beta decay nuclear transition matrix elements are generated by an effective two-body transition operator and it consists of Gamow-Teller like and Fermi like (also tensor) operators...
Atomic data for neutron-capture elements II. Photoionization and recombination properties of low-charge krypton ions
Atomic data neutron-capture elements II Photoionization low-charge krypton ions
2011/8/17
Abstract: We present multi-configuration Breit-Pauli distorted-wave photoionization (PI) cross sections and radiative recombination (RR) and dielectronic recombination (DR) rate coefficients for the f...
Atomic data for neutron-capture elements II. Photoionization and recombination properties of low-charge krypton ions
atomic data - atomic processes - HII regions - nucleosynthesis, abundances - planetary nebulae: general - stars:evolution
2011/10/12
We present multi-configuration Breit-Pauli distorted-wave photoionization (PI) cross sections and radiative recombination (RR) and dielectronic recombination (DR) rate coefficients for the first six k...
Deformation Expression for Elements of Algebras (III) --Generic product formula for *-exponentials of quadratic forms--
Weyl algebra Heisenberg Lie algebra meta-plectic groups spinor polar elements
2011/9/5
Abstract: In a noncommutative algebra there is no canonical way to express elements in univalent way, which is often called "ordering problem". In this note we give product formula of the Weyl algebra...
The First Kepler Mission Planet Confirmed With The Hobby-Eberly Telescope: Kepler-15b, a Hot Jupiter Enriched In Heavy Elements
Hot Jupiter Enriched Heavy Elements Planet Confirmed
2011/10/9
We report the discovery of Kepler-15b, a new transiting exoplanet detected by NASA's Kepler mission. The transit signal with a period of 4.94 days was detected in the quarter 1 (Q1) Kepler photometry....
Nuclear astrophysics: the unfinished quest for the origin of the elements
Nuclear astrophysics:unfinished quest origin elements
2011/10/8
Half a century has passed since the foundation of nuclear astrophysics. Since then, this discipline has reached its maturity. Today, nuclear astrophysics constitutes a multidisciplinary crucible of kn...
Formulae for the determination of the elements of the Eotvos matrix of the Earth's normal gravity field and a relation between normal and actual Gaussian curvature
Eotvos matrix normal gravity field equipotential surfaces Gauss curvature plumbline curvature
2011/9/1
Abstract: In this paper we form relations for the determination of the elements of the E\"otv\"os matrix of the Earth's normal gravity field. In addition a relation between the Gauss curvature of the ...
Abstract: Using the method of commutative algebra, we show that the set $\mathfrak{R}$ of nilpotent elements of a vertex algebra $V$ forms an ideal, and $V/\mathfrak{R}$ has no nonzero nilpotent eleme...
Arithmetical rank of squarefree monomial ideals generated by five elements or with arithmetic degree four
monomial ideal, arithmetical rank, projective dimension
2011/8/24
Abstract: Let $I$ be a squarefree monomial ideal of a polynomial ring $S$. In this paper, we prove that the arithmetical rank of $I$ is equal to the projective dimension of $S/I$ when one of the follo...
Tensorial form and matrix elements of the relativistic nuclear recoil operator
Isotope shifts, mass shift, relativistic nuclear recoil
2011/8/31
Within the lowest-order relativistic approximation (∼ v2/c2) and to first order in me/M, the tensorial form of the relativistic corrections of the nuclear recoil Hamiltonian is derived, opening ...
Trace Elements Distribution in Red Soils under Semiarid Mediterranean Environment
Trace Elements Castilla-La Mancha Region Red Soils Soil Geochemistry
2013/3/6
This study states the potential trace elements (TE’s) content of red soils located at the centre region of Spain, characterized by low rainfall and slight acidity over prolonged weathering periods. Fo...
The development of whole rock analysis of major and trace elements in XRF glass beads by fsLA-ICPMS in GSJ geochemical reference samples
bulk chemistry major and trace elements glass beads
2017/4/12
Using laser-ablation inductively coupled plasma mass spectrometer (LA-ICPMS), we have improved the reliability of
the abundance data for trace-elements in geochemical samples using a glass bead ablat...
Dissolution processes of elements from subducting sediments into fluids: Evidence from the chemical composition of the Sanbagawa pelitic schists
element mobility subduction zones pelitic schists
2017/4/12
In order to evaluate the dissolution processes of elements from subducting sediments into fluids during early stages of
metamorphism (up to oligoclase–biotite zone at about 30 km depth), the chemical...
Rare earth elements in the ornithogenic sediments from the Maritime Antarctic: A potential new palaeoecology proxy
Antarctica ornithogenic sediments rare earth elements
2017/4/12
The ornithogenic sediments in the maritime Antarctic are good archives for studying the changes of historical penguin
population. Rare earth elements (REEs) along with biological and lithophile eleme...