６ｔｈ　 China-Japan Joint Nuclear 　 Physics Symposium 　　　　　　　　　　　 May 16-20, 2006, Shanghai

Chinese Japanese

Subjects: A. Dripline Nuclei 5+3 B. Nuclear Astrophysics 1+4 C. Super-Heavy Elements 4+2 D. Hyper Nuclei 0+2 E. High Spin States 2+2 F. Nuclear Structure 6+6 G. Heavy Ion Reaction 6+1 H. Instrumentations, 5+5 Applications, Accelerator projects I. Hadron Physics and QGP 7+3

　　　 5 days, 64 talks + discussion session

I have participated all the Japan-China symposiums except the first one.

１．　 2nd China-Japan Joint Nuclear Physics Symposium on Recent Topics of 　　　　

　　　 Nuclear Physics, Beijing (China), 　　　　　　　　　 August 29 ～ September 2, 1994.　　　　　　 Talk ：“　 Study of Nuclear Structure and Collisions with Antisymmetrized

　　　　　　　　　　　　　　　　 Molecular Dynamics “.２．　 3rd Japan-China Joint Nuclear Physics Symposium, 　 Sendai and Niigata

　　　　 (Japan), 　　　　　　　 July 24 ～ 29, 1997.　　 Organizing Comm..３．　 4th China-Japan Joint Nuclear Physics Symposium, 　 Lanzhou (China), 　　　　　　　 July 31 ～ August 2, 2000. 　　　　　 Organizing Comm., Talk ：“　 Clustering in Neutron-Rich Nuclei ” 。４．　 5th Japan-China Joint Nuclear Physics Symposium, 　 Fukuoka (Japan), 　　　　　　　 March 7 ～ 10 , 2004 ．　　　　　　 Organizing Comm., Session-Chair.

Chinese talkers in middle generation (30’s and 40’s) have increased

in number.

10 years ago, Profs. Yu-Gang Ma and Jie Meng were really young , and

Prof. Bao-An Li was working hard in US as a postdoc. Almost no people older than them up to 50’s.

Now, 　 professors in the same generation as Prof. Ma are leading the

nuclear physics communinity of China, and the activity of it is now

supported by many young scientists.

Maybe, the number of talks this time is the largest in this series of symposia.

This time the symposium is for 5 days, one day longer than previous ones.

It is partly due to the inclusion of the new subject ‘quark hadron physics ‘,

but mainly it reflects the increased young activities mainly in the Chinese side.

The umbalance of the number of talkers from China and Japan for thesame subject does not necessarily reflect the umbalance of the number of the actual scientists for that subject. This problem has been present from early time but for me it seems to be reduced this time.

My talk is not a summary talk of the 64 talks given here. My talk is to give a concluding ramarks and so my stress may be larger on some selected number of talks, but it does not mean that the others are not worth mentioning with stress.

A. Dripline Nuclei

A. Ozawa : ‘reaction cross sections of unstable nuclei’ matter distribution: neutron halo and skin 14-19C, 14Be and 14,15B at RIBLL (IMP) strong collaboration with China 　 T. Nakamura ：　‘ invariant-mass spectroscopy of neutron halo nuclei’ resolution of discrepancies among three Lab.’s. 11Li = 9Li + di-neutron

di-neutron condensation ? HFB

K. Matsuta : ‘nuclear moments of mirror pairs’

large isoscalar <σ> for T=3/2 (9C, 9Li) no theory reproduced it μ, β-ft value → <Sp>, <Sn>, <lp>, <ln>

Kun Wang : 　 23Al and neighboring nuclei (RIKEN) σR and momentum distribution dominant d-wave

Cui-E Wu : 17C 1n, 2n, 3n removal σ (RIKEN) 16C(2+)+d5/2 ?

Dang-Yang Pang : 9Be(6He, 9Be)6He 3He component >> shell model

Experimental databy Nakamura

K.Hagino and 　H.Sagawa, 　 Phys.Rev.C 72, 044321 (2005).

M.Matsuo et al.HFB calculation

Shu-Wei Xu : near proton dripline in rare-earth region, βdelayed p-decay

Fu-Rong Xu : Skyrme HF for N=7 isotones → large deformation 9He deformed ?

Variety of studies for dripline nuclei σR , removal σ breakup reactions magnetic moments decay

dilute nuclear matter as halo and skin strongly correlated structures ? di-neutron cluster : not ordinary cluster, existent by Borromean effect very fragile cluster BCS-BEC cross-over

B. Nuclear Astrophysics

S. Kubono : ‘experimental study of stellar reactions at CNS’ review talk direct approach with low-energy RIB to stellar reactions SHARAQ PA CRIB ( review od CNS by Kubono and Shimoura )

K. Sumiyoshi : ‘core-collapse supernovae, neutron stars, black holes, and unstable nuclei’ from nuclear structure to macroscopic astrophysics 　　　　 Shen-EOS　　　　 EOS table constrained by unstable nuclear data 　　 K=281, Asym=36.9

H. Utsunomiya : ‘photo-nuclear reactions in astrophysics’ 35 n-deficient nuclei from 74Se to 196Hg ← photonuclear reaction photodisintegration cross section measurement at AIST 180Ta*

K. Sagara : ‘direct measurement of 12C+4He →16O+γ’ 10 year preparation with Kyushu Univ. tandem threshold cluster states

Bing Guo : neutron ANC from (d, p) → proton ANC → (p, γ) direct measurement of 11C(p,γ )12N at TRIUMF

Nuclear physics → astrophysics

cross section measurements and calculations

calculations are also very elaborate and need new ideas

for nuclear structure and reaction calculations

EOS table : constrained by nuclear data including unstable nuclei

density-dependence of symmetry energy from nucleus-nucleus collisions

Astrophysics → nuclear physics famous example : Hoyle state in 12C

( Bose condensation of 3 α)

Clustering in dilute nuclear matter1. Di-neutron condensation in neutron skin/halo of neutron-rich nuclei2. αcluster condensation in near-proton-dripline nuclei ? α cluster condensation in neutron-richer nuclei ?

12C

ground state

0 MeV

100 MeV

10 MeV

αclustergas

αcluster

nucleon gas

liquid

nucleon

Gas-like states

formed by clusters excitationenergy

Bose condensationinto lowest orbit

α condensed state

(Hoyle state)

Y. Funaki,A. Tohsaki,H. Horiuchi,P. Schuck,G. Roepke

C. Super-Heavy Elements

K. Morimoto: ‘synthesis of the heaviest elements at RIKEN’ celebrated discovery of A = 113, 2 events until now, ~30 fb　　　 GARIS （ gas-filled recoil separator) prospect : 283114 - 290117

Y. Nagame: ‘chemical and nuclear studies of the heaviest elements at JAEA’ relativistic effects may cause drastic change of electron configuration chemistry on ‘atom-at-a-time’ basis studies of Rf(Z=104) future study of Db in collaboration with IMP

Hu-Shan Xu : Heavy element study at IMP, status and prospects 265Bh, 259Db were synthesized future collaborations with RIKEN, GSI, Dubna

Zhi Qin : ‘preparation of gas-chemistry of Dubnium at IMP’ discussion of 259Db and 265Bh produced at IMP rotatory multi-detector arrays

Feng-Shou Zhang : ImQMD for synthesis of superheavy nuclei shell correction (deformed two-center shell model) , surface energy O+O, Ca+Ca 48Ca+208Pb, 238U

Zhong-Zhou Ren : ‘structure and decay of superheavy nuclei’ shape coexistence superdeformation ( deformed ) density-dependent cluster model of α-decay

D. Hyper Nuclei 　 ( Strangeness Nuclear Physics )

E. Hiyama : ‘S=-2 hypernuclei’ 3-body and 4-body studies α+ x +Λ+Λ ; x = n, p, d, t, 3He ΛΛforce ←ΛΛ

6He NNΞ, NNΞΞ, αΞN, ααtΞ are possible to be bound

M. Iwasaki : ‘Kaonic atoms and nuclei’ Λ(1405)=K- + p (Akaishi-Yamazaki)　 strange tribaryon S0(3115)T=1 ( K- 4He )atomic → S0(3115) + p 　　　

search for isospin partner J-PARC high density nuclei spectroscopy H.I. collisions

E. 　 High Spin States

E. Ideguchi : ‘high spin states with stable and unstable nuclear beams’ various excitation modes of Z ~ 50 high spin states of 197I deformed structure at high-spin states in 48Ca and 50Ti

M. Matsuzaki : ‘wobbling motion of superdeformed nuclei’ 1-phonon and 2-phon excitations of the wobbling motion were observed RPA study of wobbling mode quasi-particle alignment effect for rotation

Sheng-Jiang Zhu : high-spin states in 136,137La, 148Ce, 105Mo CIAE : La N=79,80 weak collectivity 　　　　　 Lawrence-Berkeley : Ce (octupole def.) Mo (1- and 2-phonon states of

γvib.)

Sheng-Yu Zhu : g-factor of high-spin states of 83Y (Z=39, N=44) proton g9/2 alignment followed by neutron g9/2 alignment

F. Nuclear Structure

S. Shimoura : ‘spectroscopy with RI’ various experimental techniques of direct reactions developed for RIB several examples such as 12Be(α,α’) SHARAQ: high resolution for example 3,4n, 6,7H

A. Tamii : ‘spin-flip excitations with (p, p’) at 0 degree ’ Review of RCNP activities very high resolution

K. Sekiguchi : ‘three-nucleon force’ in ab-initio structure calculations, 3N force is very important spin observables

H. Toki : ‘chiral mean-field model for finite nuclei’ chiral symmetry, role of pion, parity-charge-violated mean field

T. Nakatsukasa : ‘nuclear dynamics with time-dependent description’ novel approach to nuclear structure and reaction

Y. Utsuno : ‘large-scale shell model calculation’ disappearance of magic number, correlation energy+narrowing shell gap, monopole interaction due to tensor force

Zhong-Yu Ma : ‘giant and pygmy resonances’ RMF, RRPA ， proper treatment of resonant continuum, incompressibility and symmetry energy

You-Bao Wang : βdecay of n-rich 114-118Pd , 116-120Cd shape-transition region IGISOL(Jyvaskyla)　　　 5 levels of 3-phonon states in Cd isotopes

Jin-Dong Bao : friction effect on neutron emission in fission Langevin equation for fission

Yu-Min Zhao : ‘shell model with random interactions’ regularities by random interactions, spin zero dominance in ground states, collectivity

Jie Meng : ‘time-odd triaxial relativistic mean field’ light odd-mass nuclei near double closed shell μmoments

Shan-Gui Zhou : deformed HFB for exotic nuclei Woods-Saxon base

G. Heavy Ion Reaction

K. Hagino : ‘large-angle quasi elastic’ fusion barrier distribution: Dfus(E)= d2(Eσfus)/dE2

quasi-elastic barrier distribution: Dqe(E)= –d(σqe(E, π)/σR(E, π))/dE Dqe(E) is suitable for unstable nuclei

Zu-Hua Liu : exp. study of Dfus(E), Del(E) and Dqe(E) Legnaro : 48Ca (32S) + 90,96Zr CIAE : 6,7Li + 208Pb

Bao-An Li : ‘from earth to heaven’ EOS of n-rich matter, density deoendence of symmetry energy isospin and momentum dependent transport eq. masses and radii of netron stars are studied by using heavy-ion collision data analyses

Zhu-Xia Li : ‘elliptic flow of H and He at medium high energies’ ImQMD05, excitation function of elliptic flow, soft EOS

Yu-Gang Ma : ‘coalescence and scaling of elliptic flow’ anisotropic flows of clusters isospin-dependent QMD 86Kr + 124Sn nucleon-number scaling for anisotropic flow and momentum-space density can be understood by coalescence mechanism

Jian-Song Wang : size, temperature, and n/p ratio of initial interaction zone are derived from detected neutron and charged particle multiplicities measure of impact parameters and number of participant nucleons

H. Instrumentations, Applications, Accelerator Projects

M. Wada : ‘slow RI beam at RIKEN RIBF’ SLOWRI universal slow RIB facility

S. Jeong : ‘diffusion exp. with short-lived radiotracer 8Li’ TRIAC ( RI accelerator complex at JAEA )

H. Sakurai : ‘physics opportunities at RIKEN RIBF’ review (RIBF) Phase-I, Phase-II (SHARAQ, SAMURAI, SLOWRI, ...... )

T. Nagae : ‘physics programs at J-PARC’ review (J-PARC) strangeness nucl. Phys. (S=-1, -2 hyper nuclei)

T. Hotta : ‘laser electron photon exp. at SPring-8’　　　　 review (LEPS) pentaquark Θ+ 　 CLAS(Jlab) vs LEPS LEPS2 ( new beam line project )

Jin-Gen Chen/ ‘status report on SLEGS’ early stage of construction Wang Xu : SLEGS ( Shanghai Laser Electron Gamma Source )

Xin Dong : ‘time of flight detector for RHIC/STAR’ MRPC TOF

Guo-Qing Xiao : ‘status of CSR and RIB lines’ IMP CSR (cooling storage ring) CSRm: 2.8 GeV (p), 1.1 GeV/A (12C), 520 MeV/A ( U72+ ) CSRe, RIBLL1, RIBLL2

Zhi-Gang Xiao : ‘programs at HIRFL-CSRm’ internal and external target exp. Hplus ( hadron quark physics )

Wei-Ping Liu : ‘physics programs at CIAE’

nuclear astrophysics, BRIF project proton cyclotron, ISOL, superconducting LINAC

I. Hadron Physics and QGP

A. Hosaka : ‘photo productions of baryon resonances and pentaquarks’ γ+ N → K + Y , Y = Λ(1520) or pentaquark(Θ+) difference between LEPS and Jlab exp. conditions

Y. Miake : ‘azimuthal anisotropy and QGP’ early stage of collisions

T. Hirano : ‘perfect fluidity of QGP ?’ azimuthal anisotropy (elliptic flow) , is perfect fluidity discovered or not ?

Peng-Fei Zhuang : strongly coupled quark-meson-diquark plasma

Jin-Hui Chen : Φ-meson and strange quark dynamics

Lie-Wen Chen : dynamical quark-coalescence for Φand Ω production at RHIC

Fan Wang : lattice study of QCD vacuum

Guo-Liang Ma : azimuthal correlation of hadrons in partonic transport model

Bing-Song Zou : pentaquark components in baryons

Qun Wang : neutrino emission in color superconducting quark matter

Wei-Zhou Jiang : magnetic susceptibility of collapsed stars in hadron and quak

phases

We heard in many talks about strong collaborations of Japan and China scientists:

for example 　　　 exp. ：　 RIKEN and IMP

　　　　　　 　　　　　　 　　　 theor. Shen-EOS

China-Japan symposium series have contributed to it largely

We also heard about some future possible collaborations of China and Japan scientists:

for example SHE ( IMP and RIKEN)

in both nuclear physics and nuclear chemistry sides

We had a discussion session nicely chaired by Toki-san about the China-Japan collaborations:

Sakurai-san, Ye-san, and Ren-san gave us nice review of the present situation of

China-Japan collaborations up to now and also future possible collaborations.

Q1 Research collaboration with Chinese researchers for last 5 years?

proton resonance scattering CIAE – CNS Chinatotal reaction cross section IMP-Niigata RIKENnuclear theory PKU-RCNP Jpn.Gov. (students)

南海大 -RCNP Jpn. Grad-in-AidPKU-RCNP JSPS

nuclear data group Hokkaido through IAEAAMS CIAE-Tsukuba Tsukuba-Univ.science on short lived isotopes CIAE-Osaka JSPS-NSFC

CIAE-Osaka MEXT Atomic E.RIB physics IMP-RIKEN RIKEN

PKU-RIKEN RIKEN

subject collaboration budget

Sakurai-san

Q2 Accept Chinese post-doctoral fellows for last 5 years?

Univ./Inst. number of fellows budgetCNS 3 JSPS

1 CNSJAEA 1 JSPS

3 MEXT Atomic-E.KEK 1 JSPSRIKEN RIKEN

Sakurai-san

■ Cooperation on facility development

■ Possible participation of experiments with Big-RIPS and CSR complex ■ Possible participation of experiment with RIPS and HIRFL-RIBLL ■ Possible participation of experiments with CRIB and GIRAFFE ■ Possible cooperation on the research for superheavy nuclei

■ Possible cooperation on Photonuclear physics

■ Possible cooperation on detection technology

Proposed Experimental Collaboration from China Side

Ye-san

Summary (1)

• China side: we had good collaboration.• Possible work for future collaboration:• Visits among physicists with common interests• Participations of related conferences in Japan• Theoretical work for experiments in Japan

• Support each other on researches (Referee…)• I, as a referee of international journal,

suggested the citation of Japanese’s article.

Ren-san

What we have to do

• China-Japan symposium • China Nuclear Physics summer school existing

• CNS summer school

• JPS meeting ( then CPS meeting )

• Council for collaborationlets start now

Toki-san

Big machines in Japan (RIBF, J-PARC) and in China (Lanzhou, Beijing, Shanghai) are now with world-leading scale.

Roles of China and Japan in the international community of nuclear physics have now become very large, which implies the collaboration of two neighboring countries in asia has become far more important than before. ( like collaborations among European countries )

We can expect that the collaborations are with researches of world-leading level which are conducted by young scientists.

　春江花月夜　　　　　　　　張　若虚 （ 660 ？－ 720 ？　初唐）

　春江潮水連海平　　　　　春江の潮水　海に連なって平らかに　海上明月共潮生　　　　　海上の明月　潮と共に生ず　灔灔隨波千萬里　　　　　灔灔として波に随うこと　千万里　何處春江無月明　　　　　何処の春江か　月明無からん　　　　・ ・　　　　・　　　　　　　　　　　　　　　　　　　・　　　人生代代無窮已　　　　　人生　代々　窮まり已むことなく　江月年年祗相似　　　　　江月　年々　ただ相い似たり　　不知江月待何人　　　　　知らず　江月　何人をか待つ　但見長江送流水　　　　　ただ見る　長江　流水を送るを　　　　　　・　　　　　　　　　　　　　　　　　　 　・　　　　・　　　　　　　　　　　　　　　　　　 　・　　　　・　　　　　　　　　　　　　　　　　　 　・For us at this symposium, these sound like to imply as follows:

Successive young generations never cease to progress While nature looks to be ever similar But nature always sends to us its deep contents And waits for young people to elucidate them

Yangtze Rivernear Shanghaiin spring eveningwith flowers and moon

Summary

Thanks to Chinese organizers: Prof. Yu-Gang Ma and other executive committee members and also many young people who even met the Japanese participants at the airport.

and also to Japanese coordinator Prof. A. Ozawa

and also to the hospitality of Chinese friends

Special thanks go to

• Prof.　Xiangzhou　Cai•Mr.　Kun　Wang•Ms.　Jing　Dai•Many　students　&　staffs　in　our　group:

　　J.　H.　Chen.　J.　G.　Chen,　G.L.　Ma,　　　　S.　Zhang,　X.H.　Shi,　T.　Z.　Yan,　　　　　　E.　J.　Ma,　D.　X.　Niu,　C.　Zhong,　　　　　J.L.　Long,　W.　Guo,　W.　D.　Tian　et　al