Summary Report of the mini-Workshop on the“Problems and Future Development of theExperimental Data Compilation of Unstable Nuclei
Beam Experiments”
VIDYA Devi, ODSUREN Myagmarjav
Meme Media Laboratory, Hokkaido University
FURUTACHI Naoya
Faculty of Science, Hokkaido University

Abstract
This document summarizes the contents of the mini-Workshop on processing ofdevelopment of the experimental data compilation of unstable beam experiments.
A short description of the main topics, the list of participants and comments aregiven.

1Introduction

The User Liaison and Industrial Cooperation Group (ULIC), RIKEN Nishina Center for AcceleratorBased Science supported a mini-Workshop on processing of development of the experimental datacompilation of unstable beam experiments. The mini-Workshop took place at conference hall,RIBF building, RIKEN Nishina Centre during 13-14 December, 2011.

2Background

Development of a knowledge base and providing accurate description of the basic nuclear interactions is a fundamental and central part of the evolution of nuclear science and technology. It isa part of the inevitable necessity of knowledge sharing on nuclear data for various applications innuclear physics.
“Nuclear reaction data” have been a crucial resource in nuclear technology (e.g., ﬁssion, fusionenergy and medical diagnostics) as well as science (e.g., nuclear physics, astro-physics, nuclear
chemistry and earth science). The numerical data describe quantitatively the physical propertiesof atomic nuclei and the fundamental physical relationships governing their interactions, there bycharacterizing the physical processes underlying all nuclear technologies. Generation and proper use
of nuclear data comprising measurement and evaluation of recommended values of accurate nuclear- 81 -data belong to cutting-edge science and form an important component of basic nuclear physics.
Various reaction models have been developed based on nuclear theory and phenomenology, andthey have been veriﬁed by experimental nuclear reaction data and utilized for revision of evaluatednuclear reaction data.
Hokkaido University Nuclear Reaction Data Centre (JCPRG) compiles and accumulates chargedparticle nuclear reaction data obtained in Japanese facilities in their own data format (NRDF:
Nuclear Reaction Data File) which are distributed through the internet. A part of compiled ﬁlesis translated to the EXFOR format for the transmission of the experimental nuclear reaction data
between national and international nuclear data centers for the beneﬁts of nuclear data users in allcountries.
This report here presents an overview on the progress of the research collaboration between
RIKEN Nishina Centre and JCPRG.

3

Objectives and Main Topics of the Workshop

The purpose of this mini-Workshop is to know the current status of the research collaborationand discuss the possible eﬀorts and ways to make this collaboration more deepen. The researchcollaboration between RIKEN Nishina Center and Hokkaido University Nuclear Reaction Data
Centre (JCPRG) is in the second year and has to be developed further.
Participants, each of whom is a user, an experimentalist or a compiler of nuclear data, havediscussed the future collaboration focusing on the compilation and evaluation of nuclear reaction
data produced in RIKEN. The objective of this workshop was to familiarize the participants todiﬀerent problems and future development of the experimental data compilation of unstable nuclei
beam experiments.
The main topics of discussion in this mini-Workshop are:(i) Diﬀerent type of problems occurs in the time of compilation.
(ii) The future developments of compiling the data of unstable nuclei beam experiments.
(iii) Discussion on the astrophysical nuclear reaction and their compilation.
In the mini-Workshop, there were eight presentations in total, ﬁve from JCPRG (including aformer member) and three from RIKEN Nishina Center. From these presentations, we learnt alot
about the recent activities of nuclear reaction experiments and theoretical research held in RIKEN
and the nuclear data compilation in JCPRG.
The presentations covered the topics as detailed below:a) The topic covered on the current situation and the various issues of the experimental data tothe database and advance use in the research– Nuclear structure reactions around threshold energy regions are discussed by Kiyoshi
Kato from Hokkaido University.

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– The description about the RIKEN RIBF 2010 mini-Workshop and the subsequent progressis discussed by Kosuke Tsubakihara from Hokkaido University.
– The current situation of RIKEN data compilaion and challenges standing in the timesof compilation is discussed by Naoya Furutachi form Hokkaido University.
b) The topic covered on the description of recent RIKEN activities– Systematic provision of RIBF data and its issues are presented by the Akihisa Kohama
from the RIKEN Nishina Center.
– Possibility of nuclear data researches in RIBF is discussed by Hideaki Otsu from theRIKEN Nishina Center.
– Treatment of proton elastic scattering data is discussed by Juzo Zenihiro from theRIKEN Nishina Center.
c) The topic covered on the Future Development of the above mention activities– Data evaluation for astrophysical nuclear reactions (NRDF/A) using cluster orbital shellmodel (COSM) adopted the Gamow state is discussed by Kazuyuki Yamamoto from
Hokkaido University.
– The astrophysical nuclear reactions database NRDF/A development – compiled fromthe experimental system and there issues are discussed by Ayano Makinaga from theHokkaido University.
– Evaluation of diﬀerential cross sections of nucleon-nucleus scattering using the continuumdiscretized coupled-channels (CDCC) method is discussed by Takuma Matsumoto from
Kyushu University.
Some presentations are based on the compilation work and the information about the software
used in compilation such as HENDEL and GSYS. There were also discussions on the quality ofgood numerical data, problems which can be faced in the compilation of the numerical data, andthe methods to sort out them. These discussions were very helpful to us to propose a procedure toreceive experimental information and numerical data from RIKEN.

4

Summary

As a result of discussion in mini-Workshop on problems and future development of the experimental data compilation of unstable nuclei beam experiment, we could propose a procedure to deliver
experimental information and numerical data from RIKEN to JCPRG. In addition, the consensus
within the participants about compilation of proceeding, doctoral thesis and unpublished experimental experimental data has been reached. We will develop our collaboration in line with thediscussion.

- 83 -Acknowledgement
The authors would like to acknowledge the support by ”’R&D’ Platform Formation of Nuclear
Reaction Data in Asian Countries (2010-2013)”, Asia-Africa Science Platform Program, Japan
Society for the Promotion of Science and the support by the collaboration project between Facultyof Science, Hokkaido University and RIKEN.
Table 1: List of Participants
NAME
A. Kohama
T. Nakatsukasa
T. Uesaka
T. Tsubakihara
Y. AbeM. Kimura
M. Aikawa
Vidya Devi
J. Zenihiro
T. Matsumoto
M. Odsuren
K. Yamamoto
A. Makinaga
H. Sakurai
K. KatoN. Furutachi
H. Otsu
T. Motobayashi

AFFILATIONRIKEN Nishina Center
RIKEN Nishina Center
RIKEN Nishina Center
Hokkaido Univ.
Osaka Univ.
Hokkaido Univ.
Hokkaido Univ.
Hokkaido Univ.
RIKEN Nishina Center
Kyushu Univ.
Hokkaido Univ.
Hokkaido Univ.
Hokkaido Univ.
RIKEN Nishina Center
Hokkaido Univ.
Hokkaido Univ.
RIKEN Nishina Center
RIKEN Nishina Center- 84 -Table 2: Programme12 月 13 日
15:00-17:00

連携の現状・課題について• Nuclear Structures and Reactions around Threshold Energy Regions
加藤幾芳（北大理）• 2010 年度理研 RIBF ミニワークショップとその後の進展について
椿原康介（北大知識メディア）• JCPRG における理研データ採録の現状と課題
古立直也（北大理）• 陽子弾性散乱測定データの取り扱いについて
銭廣十三（理研仁科センター）

12 月 14 日
10:00-10:40

理研の活動• RIBF データの系統的提供と課題
小濱洋央（理研仁科センター）• RIBF での核データ研究の可能性
大津秀暁（理研仁科センター）
10:40-11:00
11:00-12:30

休憩
今後の発展

• Gamow 状 態 を 取 り 入 れ た COSM に よ る 天 体 核 反 応 デ ー タ 評 価(NRDF/A)
山本一幸（北大知識メディア）• 天体核反応データベース NRDF/A の開発 –実験系から見た採録の課題–
牧永あや乃（北大知識メディア）• 離散化チャネル結合法による核子-軽核散乱の微分断面積の評価
松本琢磨（九大理）
12:30-13:30
13:30-15:00

昼食
ディスカッション- 85 -