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Cadmium has been used historically as an important component of integral experiments because of its high thermal neutron absorption cross section. Correct interpretation of such experiments depends on accurate differential neutron cross…

核实验 · 物理学 2018-01-11 G. Leinweber , D. P. Barry , R. C. Block , J. A. Burke , K. E. Remley , M. J. Rapp , Y. Danon

Systematic study of theoretical estimation of nuclear cross section of charged particle induced reactions on rare earth nuclei has been carried out. The production cross section of the $^{150,149,148,146,144,143,141}$Pm and $^{149,147}$Nd…

核理论 · 物理学 2024-09-20 A. Saha

The level densities and $\gamma$-ray strength functions of $^{105,106,111,112}$Cd have been extracted from particle-$\gamma$ coincidence data using the Oslo method. The level densities are in very good agreement with known levels at low…

Several models of level densities exist and they often make simplified assumptions regarding the overall behavior of the total level densities (LD) and the intrinsic spin and parity distributions of the excited states. Normally, such LD…

核理论 · 物理学 2021-06-02 G. P. A. Nobre , D. A. Brown , M. W. Herman

Due to the dense environment, neutron stars (NSs) can serve as an ideal laboratory for studying the interactions between dark matter (DM) and ordinary matter. In the process of DM capture, deep inelastic scattering may dominate over elastic…

高能物理 - 唯象学 · 物理学 2024-09-11 Liangliang Su , Lei Wu , Meiwen Yang

The first peak s-process elements Rb, Sr, Y and Zr in the post-AGB star Sakurai's object (V4334 Sagittarii) have been proposed to be the result of i-process nucleosynthesis in a post-AGB very-late thermal pulse event. We estimate the…

For over thirty years, a $\sim20\%$ deficit, now exceeding $5\sigma$, has persisted between measured and predicted neutrino capture rates on $^{71}$Ga, as observed in radioactive source experiments (namely GALLEX, SAGE, and more recently…

高能物理 - 唯象学 · 物理学 2026-01-21 M. Cadeddu , N. Cargioli , F. Dordei , L. Ferro , C. Giunti , M. Pitzalis

Neutron capture data on intermediate mass nuclei are of key importance to nucleosynthesis in the weak component of the slow neutron capture processes, which occurs in massive stars. The ($n,\gamma$) cross section on $^{70}$Ge, which is…

核实验 · 物理学 2019-10-22 A. Gawlik , C. Lederer-Woods , the n_TOF collaboration

This work reports on accurate, high-resolution measurements of the $^{25}$Mg($n, \gamma$)$^{26}$Mg and $^{25}$Mg($n, tot$) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved…

核实验 · 物理学 2017-02-16 C. Massimi , The n_TOF Collaboration

Deep inelastic scattering in $^{154}$Sm+$^{160}$Gd at energies above the Bass barrier is for the first time investigated with two different microscopic dynamics approaches: improved quantum molecular dynamics (ImQMD) model and time…

核理论 · 物理学 2017-01-10 Ning Wang , Lu Guo

The basic parameters for calculations of radiative neutron capture , photon strength functions and nuclear level densities near the neutron separation energy are determined based on experimental data without an ad-hoc assumption about axial…

核实验 · 物理学 2017-12-13 Eckart Grosse , Arnd R. Junghans , Jon N. Wilson

Neutrinos in water can be detected thanks to several reactions. The most important one is the inverse beta decay $\bar\nu_{e}+p \rightarrow n+e^{+}$ . The detection of 2.2 MeV from neutron capture on free protons is very difficult. The…

高能物理 - 唯象学 · 物理学 2018-09-26 Paraskevi C. Divari

Neutron-induced reactions on unstable isotopes play a key role in the nucleosynthesis $i$--, $r$--, $p$--, $rp$-- and $\nu p$--processes occurring in astrophysical scenarios. While direct cross section measurements are possible for…

仪器与探测器 · 物理学 2020-06-24 Moshe Friedman

Accurate neutron capture cross sections are essential for the design and operation of fast reactors using MOX fuels. For $^{242}$Pu, the Nuclear Energy Agency (NEA) recommends 8--12% accuracy in the fast energy region (2--500 keV), compared…

核实验 · 物理学 2026-01-09 J. Lerendegui-Marco , C. Guerrero , E. Mendoza , J. M. Quesada , K. Eberhardt , A. R. Junghans , V. Alcayne , V. Babiano , O. Aberle , J. Andrzejewski , L. Audouin , V. Becares , M. Bacak , J. Balibrea-Correa , M. Barbagallo , S. Barros , F. Becvar , C. Beinrucker , E. Berthoumieux , J. Billowes , D. Bosnar , M. Brugger , M. Caamaño , F. Calviño , M. Calviani , D. Cano-Ott , R. Cardella , A. Casanovas , D. M. Castelluccio , F. Cerutti , Y. H. Chen , E. Chiaveri , N. Colonna , G. Cortés , M. A. Cortés-Giraldo , L. Cosentino , L. A. Damone , M. Diakaki , M. Dietz , C. Domingo-Pardo , R. Dressler , E. Dupont , I. Durán , B. Fernández-Domínguez , A. Ferrari , P. Ferreira , P. Finocchiaro , V. Furman , K. Göbel , A. R. García , A. Gawlik , T. Glodariu , I. F. Goncalves , E. González-Romero , A. Goverdovski , E. Griesmayer , F. Gunsing , H. Harada , T. Heftrich , S. Heinitz , J. Heyse , D. G. Jenkins , E. Jericha , F. Käppeler , Y. Kadi , T. Katabuchi , P. Kavrigin , V. Ketlerov , V. Khryachkov , A. Kimura , N. Kivel , M. Kokkoris , M. Krticka , E. Leal-Cidoncha , C. Lederer-Woods , H. Leeb , S. Lo Meo , S. J. Lonsdale , R. Losito , D. Macina , J. Marganiec , T. Martínez , C. Massimi , P. Mastinu , M. Mastromarco , F. Matteucci , E. A. Maugeri , A. Mengoni , P. M. Milazzo , F. Mingrone , M. Mirea , S. Montesano , A. Musumarra , R. Nolte , A. Oprea , N. Patronis , A. Pavlik , J. Perkowski , J. I. Porras , J. Praena , K. Rajeev , T. Rauscher , R. Reifarth , A. Riego-Perez , P. C. Rout , C. Rubbia , J. A. Ryan , M. Sabaté-Gilarte , A. Saxena , P. Schillebeeckx , S. Schmidt , D. Schumann , P. Sedyshev , A. G. Smith , A. Stamatopoulos , G. Tagliente , J. L. Tain , A. Tarifeño-Saldivia , L. Tassan-Got , A. Tsinganis , S. Valenta , G. Vannini , V. Variale , P. Vaz , A. Ventura , V. Vlachoudis , R. Vlastou , A. Wallner , S. Warren , M. Weigand , C. Weiss , C. Wolf , P. J. Woods , T. Wright , P. Zugec , the n_TOF Collaboration

The dynamical stability of the iterates during training plays a key role in determining the minima obtained by optimization algorithms. For example, stable solutions of gradient descent (GD) correspond to flat minima, which have been…

机器学习 · 计算机科学 2026-02-17 Rotem Mulayoff , Sebastian U. Stich

The stellar reaction rates of radiative $\alpha$-capture reactions on heavy isotopes are of crucial importance for the $\gamma$ process network calculations. These rates are usually derived from statistical model calculations, which need to…

核实验 · 物理学 2018-01-04 T. Szücs , G. G. Kiss , Gy. Gyürky , Zs. Fülöp , Z. Halász , T. Rauscher

In this undergraduate project, f-mode oscillations in neutron stars are used to constrain the equation of state of dense matter. For the first time, a systematic investigation of the role of nuclear saturation parameters on the mode…

高能天体物理现象 · 物理学 2021-08-12 Sukrit Jaiswal , Debarati Chatterjee

Neutrino absorption cross sections for 71Ga are calculated for all solar neutrino sources with standard energy spectra, and for laboratory sources of 51Cr and 37Ar; the calculations include, where appropriate, the thermal energy of fusing…

高能物理 - 唯象学 · 物理学 2008-11-26 John N. Bahcall

The $\gamma$-gated proton spectra measured in the reactions $^{64}$Ni($^{9}$Be, p2n)$^{70}$Ga and $^{64}$Ni($^{9}$Be, pn)$^{71}$Ga, have been utilized to obtain the nuclear level density (NLD) of $^{71}$Ga and $^{72}$Ga nuclei by using the…

The bremsstrahlung flux-averaged cross sections for the photoneutron reactions $^{\text{93}}$Nb($\gamma $,xn;x=1-5)$^{\text{(93-x)m,g}}$Nb were measured in the range of boundary energies of bremsstrahlung $\gamma $-quanta $E_{\gamma…