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We introduce a new algorithm for interpolating measurements of the point-spread function (PSF) using stars from many exposures. The principal components of the variation in the PSF pattern from multiple exposures are used to solve for…

天体物理学 · 物理学 2007-05-23 Mike Jarvis , Bhuvnesh Jain

The astrophysical direct nuclear capture reaction $^{12}{\rm C}(p, \gamma)^{13}{\rm N}$ is studied within the framework of a potential model. Parameters of the nuclear $p-^{12}$C interaction potentials of the Woods-Saxon form are adjusted…

核理论 · 物理学 2025-05-13 E. M. Tursunov , S. A. Turakulov , A. S. Kadyrov

A study of interaction of neutron rich oxygen isotopes $^{17,18}$O with light targets has been undertaken in order to determine the optical potentials needed for the transfer reaction $^{13}$C($^{17}$O,$^{18}$O)$^{12}$C. Optical potentials…

核实验 · 物理学 2015-06-19 T. Al-Abdullah , F. Carstoiu , C. A. Gagliardi , G. Tabacaru , L. Trache , R. E. Tribble

Annealed Importance Sampling (AIS) and its Sequential Monte Carlo (SMC) extensions are state-of-the-art methods for estimating normalizing constants of probability distributions. We propose here a novel Monte Carlo algorithm, Annealed Flow…

机器学习 · 统计学 2021-07-12 Michael Arbel , Alexander G. D. G. Matthews , Arnaud Doucet

Recently, a new $\Delta$ method for the calculation of asymptotic normalization coefficients (ANC) from phase-shift data has been formulated, proved and used for bound states. This method differs from the conventional one by fitting only…

核理论 · 物理学 2018-08-15 B. F. Irgaziev , Yu. V. Orlov

Spectroscopic amplitudes are calculated for one--nucleon transfer between low--lying, normal--parity states of nuclei in the lower part of the 1p$0\,$f--shell. Calculations are performed using shell--model wave functions obtained from the…

核理论 · 物理学 2007-05-23 E. Kwa{ś}niewicz , H. Herndl , H. Oberhummer

Single-particle overlap functions and spectroscopic factors are calculated on the basis of the one-body density matrices (ODM) obtained for the nucleus $^{16}O$ employing different approaches to account for the effects of correlations. The…

A simple and model-independent method is described to derive neutron single-particle spectroscopic factors of bound s-wave states in $^{A+1}Z = ^{A}Z \otimes n$ nuclei from neutron scattering lengths. Spectroscopic factors for the nuclei…

核理论 · 物理学 2016-09-08 P. Mohr , H. Herndl , H. Oberhummer

The knowledge of the exact structure of the optical system PSF enables a high-quality image reconstruction in fluorescence microscopy. Accurate PSF models account for the vector nature of light and the phase and amplitude modifications.…

Recently a new $\Delta$ method for deducing the energy and asymptotic normalization coefficient (ANC) from phase-shift data has been formulated and applied to resonance states. This differs from the conventional effective-range function…

核理论 · 物理学 2020-12-02 Yu. V. Orlov

An overall reduction factor (ORF) is introduced for studying the quenching of single particle strengths through nucleon transfer reactions. The ORF includes contributions of all the probed bound states of the residual nucleus in a transfer…

核实验 · 物理学 2018-10-04 Y. P. Xu , D. Y. Pang , X. Y. Yun , C. Wen , C. X. Yuan , J. L. Lou

Asymptotic normalization coefficients (ANCs) for 8Li->7Li+n have been extracted from the neutron transfer reaction 13C(7Li,8Li)12C at 63 MeV. These are related to the ANCs in 8B->7Be+p using charge symmetry. We extract ANCs for 8B that are…

Recently we proposed a formalism, based in nuclear statistical spectroscopy, for efficient computation of nuclear level density, or densities of states, through a sum of partitioned binomial functions (SUPARB). In this Letter we extend the…

核理论 · 物理学 2007-05-23 Calvin W. Johnson , Jameel-Un Nabi , W. Erich Ormand

Asymptotic normalization coefficients (ANCs) are fundamental nuclear constants playing important role in nuclear reactions, nuclear structure and nuclear astrophysics. In this paper the physical reasons of the Coulomb renormalization of the…

核理论 · 物理学 2015-06-11 A. M. Mukhamedzhanov

As an old and widely used tool, it is still possible to find new insights and applications from Fast Fourier Transform (FFT)-based analyses. The FFT is frequently used to generate the Power Spectral Density (PSD) function, by squaring the…

数据分析、统计与概率 · 物理学 2009-01-26 Sheng-Chiang Lee , Randall D. Peters

We carry out a systematic analysis of angular distribution measurements for selected ground-state to ground-state (d,p) and (p,d) neutron transfer reactions, including the calcium isotopes. We propose a consistent three-body model reaction…

核实验 · 物理学 2008-11-26 Jenny Lee , J. A. Tostevin , B. A. Brown , F. Delaunay , W. G. Lynch , M. J. Saelim , M. B. Tsang

Optical microscopy is an essential tool in biology and medicine. Imaging thin, yet non-flat objects in a single shot (without relying on more sophisticated sectioning setups) remains challenging as the shallow depth of field that comes with…

图像与视频处理 · 电气工程与系统科学 2020-10-14 Adrian Shajkofci , Michael Liebling

In a well-established many-body framework, successful in modeling a great variety of nuclear processes, we analyze the role of the spectral functions (SFs) accounting for the modifications of the dispersion relation of nucleons embedded in…

核理论 · 物理学 2017-08-23 Juan Nieves , Joanna Ewa Sobczyk

Time-dependent Hartree-Fock approach in three dimensions is employed to study the multi-nucleon transfer reaction $^{132}$Sn + $^{208}$Pb at various incident energies above the Coulomb barrier. Probabilities for different transfer channels…

核理论 · 物理学 2018-11-14 Xiang Jiang , Nan Wang

Single-nucleon transfer reactions offer a valuable way to probe nuclear structure. We explore the effect of directly introducing overlap functions computed using the Gamow shell model (GSM) into reaction calculations, taking the $\left<…

核理论 · 物理学 2025-10-15 M. R. Xie , J. G. Li , N. Keeley , N. Michel , W. Zuo