EO 13526 SECTION 53(b)(3)

ISCAP APPEAL NO 2003-0036 document no 8 DECLASSIFICATION DATE September 292014

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middot Se~rat~o~ (LIS) ~n Taiwan arld JUaewheremiddotmiddot I i I

l middotJ 1 bull The _attached jpa_per p~es~ts an- l~ate c)t middotosr-amiddot-~middot-- -----

-- middot -~middot- -~~-----~t----~-------~

assessment ofWOIJdwid~ capabilltieL in LtS -~~~ ~ =r=~middot=e=s=ted=middot =---

1977

The section on T_~iwan includes oine ~~dditional nformatiop

middotnot incluti~~d middot in the 9 December 77 Nl~) item

middotand l IOSIN~Ilmiddot Withheld tinder statutoh author ty of the ----------_--_-middot ____ central Intelligeilce Agrncy Act r 1949 (SO

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DECLASSIFIED UNDER AUTHORITY OF THE INTERAGENCY SECURITY CLASSIFICATION APPEALS PANEL

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bull Update to July l977 OSI Publication~ middot __bullwd~ldwi middot middotmiddot seiin--furcmiddot ~ ---- - middotmiddot

Capabilities in Laser Isotope s~parAtion I

bull i I --- -- -- middot

middot - l - - -- ~middot middot- The attache~ OSI Publicatior1 middotbullworldWi4e Scientific _____

Capabillti7s ip taser +sotope Sepatatien _- (LlS) ~ummaribullebull OSI analys~s on thifJ topic up middotto mid-1977 - ~Although in the main our perceptions of the worldwlde -sitUa4ion - h~ve not cl)angedintl)esix months ~~nce public~t~oll~ seve ~ atevents otinterest)ave occurred durin that time

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middot Exp~riments in ur~nium enrichment by l~sers are diffie11lt _middotmiddot requiring advanced capability in spect~~oscofgtYi la$er teohno~oqy _

Jli~terials te~hnology~ and uranium cbem~~ stryt Two 1 approllchebull=

lire under investigation middot in the US _In th~ _ ~irst Itunable_~ye lasers operating with visible light exvite atoms ~f one middotisotope

gt cf uranium The excitedmiddot ~toms are middot then ionlizecl by another laser _ ~~nd separatep by electric or magne~ic 1Fields rrhis work -middot

~ 1as be~n rnostlr unclass~fi~d and_~iqe~yen p~li~~dr middot Althouqp middot middot ~i9nmter~cial eJlr~~hment bymiddot tl_lis method r1~qulrrs muc~ ~ additionF~l middot ~jevelopment a small facll~ty capabilijiy of enriclung material o Jor a few weapons could be developed poundfom present lmiddot us technology

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Withheld under statutory authorityof the middot ~- --- - -- ------+middot -~entntfinfelligence Agency Acto 111~ Jt _

US~C_section 40~g) ----~-- --~ ~ middotmiddot middot

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Central Intellig~nce Agency Act of1919 (50 uscmiddotsection 403g) middotmiddot I

middot - middot bull bullbull Ixn middotthe second appromiddotmiddot~ch lasers Qperati g wit infrared llght excite molecules of pra11ium hecafluor d~ ultra-violet laser is then useQ to dissoci~ti~ the molecqle - middotmiddot middot Development -of these typ~s of lasers middotll4ve p~oven tio be extrtmely difficult and continues to delay develQpmen~ _o~ t~is procew~bull

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