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This is a coversheetfor a classifieddocument. Tranfiaittalof the docu.nt must be coveredby a A gned receipt.It must not be left umtterded or wherean unauthorizedpersonmay have accessto it, ;ihennot in use,i.tmust b@storedin a lockedfileor safe. ~tinilethisdocumentis inyourpossessionand untilyou haveobtaineda signedreceiptuponits transfer,it is yourresponsibilitythatthe hfor-.aationcontainedhereinis not compromised.

TH2 ENLY WhiWS TRhIMJLwYJ!IONCCJNTAINEDIN ‘J’H12LXXUMENT.INNJT LL71HIMGET IT THROUGHY(JURNEGLIGhlKX. -~ - —e

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For Reference i,7-—-....-&—–,.—..- —

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APPROVED FOR PUBLIC RELEASE


ABOUT THIS REPORT

This official electronic version was created by scanning the best available paper or microfiche copy of the original report at a 300 dpi resolution. Original color illustrations appear as black and white images. For additional information or comments, contact: Library Without Walls Project Los Alamos National Laboratory Research Library Los Alamos, NM 87544 Phone: (505)667-4448 E-mail: [email protected]

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VERIFIED UNCLASSIFIEDLPw& 4 mn, ~

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G;’NImALR.?I’OET-—

!Iostof tha productionworkhas been

has bec n duv~ the past two months. The

X-3 InspectionSeution appearsseparately

FL3, CJ

performedat T“*Siteas it

productionreportof the

underthe X-3 repo T%, ais-

regardingthe faotwherethe work, as suoh,has been perfored. The

intimatecooxiination betweenX-l and the InspectionSectionof X-3

has been of greatad.vanta&eto everyone

angle only. !!hereare discrepanciesh

whichask for a sctlut ion in the nearest

concerned,from the teohnical

mattersof personnelpolicy

future. The most Bigniflcant

experimentalwork in X-1 has been performedon the use of ~60tOp+2S

(WI@), which is bei~ discussedin a sepazatechapter.,

lWt)lX)GTIONRW?WiT

.

Routineradtogrnphicinspection work has been performedon charges

;I

comingfromX-2 and Anchor. Due to deliveryof the orderedstandaand

i. caeeettes,it has been possibleto takecare of the entiretuballoyi’

comi~ from(WoupM-1.

● The followingtablegivesa surveyof the numberof objectsinspected

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dnrin$ the

. .

month of June:

.m9-.**e 9*

.; ●●; ● ● ☛ ✍✎

✎

☎ ✚ ✎✍✚ 99

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.

._.——-t.

!!29!32

X-2

X-4;

.

M-1KlumZnumTubaUoy

Spsoifiw?tiolmCOmmit%eia

Total

CW 13c!vsn!w IN J~I; , 1946..

# of o~cte

314 - 2344 3

1’ 116 0

19 11——

400 3s

UNCLASSIFIED

7.32

6.gI.

4.340

57*3—

995

RKihUiCH

(1) specif~ommi

Duringthe monthof June the experimentalwork decidedby the ,

SpecificationsCommitteehas eloweddown due to the fact thatX-1 has

not been able to obtainthe requiredBawtol stepwedges. As soon i?18

thesewedgesare deliveredfromX-2, the workwill be continued.

F“’iRSOliNrz

During

He has been

/’

the monthof June,Mr. John B. Fitzgibbonejoinedour Group.

an X-Ray!l’echnlcianin the UnitedStateslmmy.

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on two rodsand can be handledby meansof a remotecontrol. The actual

sourcecontainerwith the sourcerestson en exchangeableb~’sscylinder

imheddedin the lead cylinder. In caoe of contamination,the brass ayl-

~ndercan be exch~nged.The photoson pages 11 and 11S showthe lead

containerand its partsin variouspositions.The photoson p:’geIV

showthe deliveryand thetransferof the source.

The first radiographicinvest%ations were performedon stesl. A

stopwodg with 7 steps- each step314 ‘tth%ck- was radiographer.The

distancewns ~t~. Thecurie minuteswere calculatedbasedon the decay

curvoof RaLa (pegeVII). l@stman-XodakIndustrialTypeAFiUn between

two O.OO~filead foilsas intensifyingscreenswas used. Thesefilmswere

developedin a commercialX-Ray dovelopcrwith 2$K. 1. solutionfor 5

minutesat 6@ I?*

0J3?AINRDiWTA

The tableon pageVIII she,.sthe obtaineddata. The curiesfor each

exposureare tabulfitedfrom the decaycurveof RaIJa(pageVII) based on the

formula:

wherebyin thiscase E s 13.8 curiet3K = decayconstantper day

The film densityfor eachcase is the ave~e densityof five readingsper=

formedwith theAnsco Sweetdensitometer.●



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The printof

Load letterswere

The graph on

1: b “b-*’* . ..0- ;@.

.** ●:O ..b.:*ee. b* 9

‘u: UNCLASSIFIED

VI

the shadowgraphof film# 8 can be seenon prge IX.

placadon eaoh step to visualizetheabsorption.

pageX showsthe chazvicterist b curves obtainedfrom

the above-mentionedtable.

The graph on pngeXI 6hows the curie minutes versusthiclmessof

steelobtainedfrom the graph au pageX.

CONCLUSION .

Yhis preliminaryexperimentshowethatReLaas one of the obtainable

isotopescan be used for industrialradiography.It asksfor fu~her ia-

,. vestigation;suohae, othertypesof obtainableftlms,variousscreen.

combinations,varioussouroealzes,scattering,the resolutionand other

relatedfactors. On pageXII and X11X paperand film printsof the sha-

dowgraphof an electricdrillcan be seen. (Exposure:~t~ distance,

1* curieminutes)

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