Nagoya University
NagoyaUniversity

Introduction
to the Symposium
ToshioNAKAMURA
Directorof the Center fbrChronologicalResearch,
Nagoya University

The

Symposium of Radiometric･
Dating Studies - Frontier of"International

TechnicalDevelopments and Applicationsof CHIMEandi4C

AMS

Dating Methods -" washeld on January 15-17,2007 at the Center forChronologicalResearch,Nagoya University,inNagoya, Japan.Totally20 oral and 12 posterpresentations
wereThis symposium
participants,
i4C

datingmethods

to summarize

aimed

given by fbreignand JttpaneseCHIME

the present
status ofbothandto survey

prospectivefrontiersof both technical andBoth CHIMEU-Th-Pb

andandAMS

applicationdevelopments.

investigatedfbrmoreappiications

ofthan 25 years at Nagoya

the methods

i4CAMS

dating methods

have been intensively

University,and the technical studies as well as

have been accelerated

the establishment

sinceofourresearchfacility,
the Center fbr ChronologicalResearch (CCR),
since 2000.At present,both dating
methods

areinevitablefor chronologicalresearchesonthe historyof earth's environment

andhuman developments.

The origin
developed systemof our centerof the AMS
goes back to the introduction

works

done by emeritus

professorNobuyuki

isa TandetronAMS

Nakai of the department of Eanh and PlanetarySciences.That systemmanufactured

a newlydating,in 1981-82,at the RadioisotopeCenterof Nagoya

fbr radiocarbon

University,through,the hard and heavy negotiation

machinesystem,by General Ionex Corporation,and that machineis a brothermachineofToronto University
at thethose

introduced to both AMS

facilities
in Arizona Universityand

sameofbothperiod.The leadersfacilities
are panicipat･ing
in this meeting. In 1996-97, we havesuccessfu11y

introducedanothernewhigh-quality
AMSsystem

EngineeringEurope,the Netherlands,and by using thisAMSagesofhistoricsamples

datesofthe

which

requireby High Vdltage

manufacturedmachine,

high accuracy, to be compared

wewithmeasureradiocarbon

accurate

historicalsamples.

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Nagoya University
NagoyaUniversity

During the historyin the past 26 years,the Datingand MaterialsResearch Center
wasestablishedin 1990,and presentlythe Center fbrthe ChronologicalResearch was

the previouscenter in 2000.

succeeqing

In addition
been studied by many

to studies on younger samples,
researcherswhich

the minerals

measuresoflate 1980s, androck

the abundance

toby thismethod,ofso

dating,this methodusesmatters.

Among them, NagQya AMS

on,

in collaboration

as well

aspresentedat this Conference.

is oneof

theTherefbre,very huge variety materials

canbe dated

thatcarbon

in Atganistan,the caves

ofin Jomon, Yayoi, and Kofun periods,relics of historicwith

NationalInstituteofJapaneseHistory,Tokyo Institute

Aichi PrefecturalArcheology Center,Nagoya University
Museum, andwere

the seeds fbrfuturestudies
wantedwantedto show

to cateh,so on.

ofArt,The remarkab]ealso presentedat this Conference.

Finally,I emphasize

wc

mostGrottoesat

Mogao

forCultural
Properties,
Nara Institutefbr CulturalProperties,
Ikuo Hirayama Museum

establishments

Japanesesamples,group is recently fbcusingon historical

BamyanDunhuang in China, potterysamples
persons,and

weresoof

fbreignsamples,

farestablishedachievements

the wall paintingsin the caves

thorium, and lead elenients inofuranium,

date huge number

forming organic

elements

datingby ProfessorKazuhiro Suzuki at around

Returning to radiocarbon
commonhistoryhas

firstly
establishedwashas been uged

determinationof earth's

in 1949.Among them, the CHIME

itsestabljshment

utilizes

samples,The remarkablesamples.

andageDepartment of Earthand PlanetarySciences,Facultyof

oftheScience,Nagoya University,sincemethod,organizedandagainimportantaim

that the mostfuturedeve]opments.This symposium

our achieyemcnts

to thc audience.

findand discussthe seeds

datingstudies. I really hope all our aims

areisto findthis symposium

ofwasBut, at the same

to public,andopentime, we,researchers,

forfuturedevelopments inthe filedof radiometric
successfu11yachieved

atthismeeting.

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