94，96 Zr中恒星30- keV中子俘获和90 Zr（γ，n）89 Zr与高功率液态锂靶的光核反应

Stopping powers of LiF thin films deposited onto self-supporting Al foils for swift protons

The energy losses of ~(0.273-3.334) MeV protons in Lithium Fluoride thin films deposited by vacuum evaporation onto self-supporting Al foils have been measured using the transmission method. The thicknesses of selected and used Lithium Fluoride/Al target samples were accurately determined via systematic energy loss measurements for alpha particles from a very thin mixed 241Am/239Pu/233U radioactive source. The samples were investigated in detail for their stoichiometry and their impurity contents by backscattering Rutherford spectrometry and nuclear reaction analysis. Then, Lithium Fluoride st…

Stellar $s$-process neutron capture cross sections of $^{69,71}$Ga

The stable gallium isotopes, $^{69,71}$Ga, are mostly produced by the weak slow ($s$) process in massive stars. We report here on measurements of astrophysically-relevant neutron capture cross sections of the $^{69,71}$Ga$(n,γ)$ reactions. The experiments were performed by the activation technique using a high-intensity ($3-5\times10^{10}$ n/s), quasi-Maxwellian neutron beam that closely mimics conditions of stellar $s$-process nucleosynthesis at $kT \approx$ 40 keV. The neutron field was produced by a mA proton beam at $E_p=1925$ keV (beam power of 2-3 kW) from the Soreq Applied Research Acce…

PINO --模拟7 Li（p，n）反应中子谱的工具

PINO - a tool for simulating neutron spectra resulting from the 7Li(p,n) reaction

7 Li（p，n）反应与3.7 MV的Van de Graaff加速器相结合，在FZK常规使用，以进行激活以及keV区域中子的飞行时间测量。计划中的具有更高质子电流的新装置（如SARAF和FRANZ）以及液体锂靶技术的可用性将引发这种方法的复兴。详细了解中子能谱不仅在实验计划阶段很重要，而且在活化实验分析过程中也很重要。因此，基于蒙特卡罗的程序PINO（质子在中子出）的开发，它允许考虑设置的几何形状和质子能量分布的中子谱的模拟。

Measurement of $d + ^7$Be cross sections for Big-Bang nucleosynthesis

The cross sections of nuclear reactions between the radioisotope $^7$Be and deuterium, a possible mechanism of reducing the production of mass-7 nuclides in Big-Bang nucleosynthesis, were measured at center-of-mass energies between 0.2 MeV and 1.5 MeV. The measured cross sections are dominated by the $(d,α)$ reaction channel, towards which prior experiments were mostly insensitive. A new resonance at 0.36(5)~MeV with a strength of $ωγ$ = 1.7(5)~keV was observed inside the relevant Gamow window. Calculations of nucleosynthesis outcomes based on the experimental cross section show that the reson…

The $^{7}$Be($\boldsymbol{n,p}$)$^{7}$Li reaction and the Cosmological Lithium Problem: measurement of the cross section in a wide energy range at n_TOF (CERN)

We report on the measurement of the $^{7}$Be($n, p$)$^{7}$Li cross section from thermal to approximately 325 keV neutron energy, performed in the high-flux experimental area (EAR2) of the n\_TOF facility at CERN. This reaction plays a key role in the lithium yield of the Big Bang Nucleosynthesis (BBN) for standard cosmology. The only two previous time-of-flight measurements performed on this reaction did not cover the energy window of interest for BBN, and showed a large discrepancy between each other. The measurement was performed with a Si-telescope, and a high-purity sample produced by impl…

EXKALIBUR：迈向卡原子周期表以检验基本相互作用

EXKALIBUR: Towards a Kaonic Atoms Periodic Table to test Fundamental Interactions

EXKALIBUR项目旨在通过DAΦNE加速器上对多种卡原子的高精度X射线光谱测量，降低卡子质量不确定性、约束核相互作用模型并检验强场QED。

Ab initio prediction of the $^4{\rm He}(d,γ)\,^6\rm Li$ big bang radiative capture

The rate at which helium ($^4$He) and deuterium ($d$) fuse together to produce lithium-6 ($^6$Li) and a $γ$ ray, $^4$He$(d,γ)^6$Li, is a critical puzzle piece in resolving the roughly three orders of magnitude discrepancy between big bang predictions and astronomical observations for the primordial abundance of $^6$Li. The accurate determination of this radiative capture rate requires the quantitative and predictive description of the fusion probability across the big bang energy window ($30$ keV $\lesssim E\lesssim 400$ keV), where measurements are hindered by low counting rates. We present f…

Stellar $^{36,38}$Ar$(n,γ)^{37,39}$Ar reactions and their effect on light neutron-rich nuclide synthesis

The $^{36}$Ar$(n,γ)^{37}$Ar ($t_{1/2}$ = 35 d) and $^{38}$Ar$(n,γ)^{39}$Ar (269 y) reactions were studied for the first time with a quasi-Maxwellian ($kT \sim 47$ keV) neutron flux for Maxwellian Average Cross Section (MACS) measurements at stellar energies. Gas samples were irradiated at the high-intensity Soreq applied research accelerator facility-liquid-lithium target neutron source and the $^{37}$Ar/$^{36}$Ar and $^{39}$Ar/$^{38}$Ar ratios in the activated samples were determined by accelerator mass spectrometry at the ATLAS facility (Argonne National Laboratory). The $^{37}$Ar activity w…

恒星s过程的中子俘获截面：A-Se与A-Ce

Stellar s-process neutron capture cross sections on A-Se and A-Ce

本文报告了在SARAF-LiLiT实验室利用高强度中子束测量nat-Se和nat-Ce的s过程中子俘获截面，通过活化及γ能谱方法获得麦克斯韦平均截面。

Development of $^{100}$Mo-containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search

This paper reports on the development of a technology involving $^{100}$Mo-enriched scintillating bolometers, compatible with the goals of CUPID, a proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ($\sim$1~kg), high optical quality, radiopure $^{100}$Mo-containing zinc and lithium molybdate crystals have been produced and used to develop high performance single detector modules based on 0.2--0.4~kg scintillating bolometers. In particular, the energy resolution of the lithium molybdate detectors near the $Q$-value of the double-beta transit…

The $^{7}$Be(n,p)$^{7}$Li reaction and the Cosmological Lithium Problem: measurement of the cross section in a wide energy range at n_TOF (CERN)

We report on the measurement of the $^{7}$Be($n, p$)$^{7}$Li cross section from thermal to approximately 325 keV neutron energy, performed in the high-flux experimental area (EAR2) of the n_TOF facility at CERN. This reaction plays a key role in the lithium yield of the Big Bang Nucleosynthesis (BBN) for standard cosmology. The only two previous time-of-flight measurements performed on this reaction did not cover the energy window of interest for BBN, and showed a large discrepancy between each other. The measurement was performed with a Si-telescope, and a high-purity sample produced by impla…

恒星s过程铈同位素中子俘获截面

Stellar s-process neutron capture cross section of Ce isotopes

本研究重新测量了铈稳定同位素的中子俘获截面，利用准麦克斯韦中子场和活化法，发现$^{140}$Ce的麦克斯韦平均截面比近期实验值约小15%，有助于解释球状星团中铈丰度的模型偏差。