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Abstract. Our research goal is to measure the 7 Be(d, p) reaction to shed light on the 7 Li problem in the Big-Bang Nucleosynthesis. We are developing an unstable 7 Be target for a high-resolution measurement of the 7 Be(d, p) 8 Be reaction. We plan to compare two methods to produce the 7 Be target: (1) Activation method, and (2) Implantation method. We performed an activation method experiment at the Van de Graaff at Osaka University, and obtained the cross-section data. A second experiment to obtain more accurate data will take place at the Tandem Electrostatic Accelerator, Kobe University. We have also made a 7 Be target with implantation method at CRIB, Center for Nuclear Study, University of Tokyo. An experiment to measure the (d, p) reaction with the implanted target is scheduled for 2018 at Japan Atomic Energy Agency, tandem facility. IntroductionThe overestimation of primordial 7 Li abundance in the standard Big-Bang Nucleosynthesis (BBN) model is one of the known and unresolved problem. A recent theoretical BBN model predicts a primordial 7 Li abundance that is about 3 times larger than the recent precise observation [? ]. The difference is quite large while the abundance of the other light nuclei are reproduced well. This is one of the biggest problems in the BBN models and it illustrates the incomplete knowledge of the processes of the primordial formation of our universe.Light nuclei were produced up to 7 Be by nuclear reactions in several hundred seconds following the Big Bang (Figure ??).7 Li nuclei were predominantly produced by the β decay of 7 Be in the standard BBN model. The β decay half life of 7 Be, 53.22 days = 5 million seconds, is much longer ⋆

This paper explores the maximum amount of rainfall in the Central coastal provinces of Vietnam (Quang Binh case study) for return periods of 5 years, 10 years, 20 years, 50 years, and 100 years, which correspond to frequencies of 20%, 10%, 5%, 2%, and 1%, respectively. The results show that at a frequency of 20%, the maximum intensity of rain during a heavy rain spell can range from 636.6 to 696.0 mm, while the maximum one-day amount received was over 300 mm, which can occur many times in 5 years. At a frequency of 1%, the intensity of rain during a heavy rain spell can range from 1,197.9 to 1,268.3 mm, while the maximum one-day amount ranged from 487.4 to 521.9 mm. However, such values are very rare over the course of 100 years. In addition, in terms of annual rainfall, the spatial distribution of heavy rainfall in coastal areas was significantly smaller than that in mountainous areas. The highest one-day and five-day rainfall have the same pattern of spatial distribution as annual rainfall. and aims to analyse the characteristics of rain and heavy rain in the research area, including an analysis of frequency of extreme rainfalls, and of the temporal and spatial distribution characteristics of heavy rainfall. Data and methodology

Stopping powers of \(\alpha\)-particles emitted by \(^{148}\)Gd, \(^{241}\)Am and \(^{243}\)Cm isotopes in PR10 and isobutane (C\(_{4}\)H\(_{10}\)+Ar) gases have been experimentally measured in the energy region from 1.0 to 5.5 MeV. The experimental data were compared with those calculated by SRIM-2013 computer code. It was concluded that the experimental stopping powers in our investigated region are in agreement with the calculated values.