ray principal.pdf

7/26/2019 Ray Principal.pdf

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ActivityActivity CiCi 33..77@@

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Radioactive

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5@'UW.PN&!E"G&"$3,40VE".'$)1+,/>"(3,$3,40/W5@AN!"#'BB&.5@'UW.PN&!E"G&"$3,40VE".'$)1+,/>"(3,$3,40/W5@AN!"#'BB&.A,+2E",A!N'$W!BH*.+2%E/3(4"$F01J=&/>"(3,$3,40IN2F31!PC4"$A,+2E",A!N'$W!BH*.+2%E/3(4"$F01J=&/>"(3,$3,40IN2F31!PC4"$

/3##3.-$3,40-&+,'/W(P!&J.S"=.@F01F>"N&!2-@/31!/3##3.-$3,40-&+,'/W(P!&J.S"=.@F01F>"N&!2-@/31!

x= eII 0 =4C4./"$N%N/A).


> )1 > 3 3 0 I J & ;> )1 > 3 3 0 I J & ;


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Transmission Factor =Transmission Factor =II22

E"+3-$"4E!.B+,$3,40/E+.UA3,VE".'$)1+,/>"(3,E"+3-$"4E!.B+,$3,40/E+.UA3,VE".'$)1+,/>"(3,(I(I22))

-E+$3,40/E+.VE".'$)1+,/>"(3,-E+$3,40/E+.VE".'$)1+,/>"(3,(I(I11))

II11

/"$>".!L!"#U."'$)+,/>"(3,$3,40O/##"IN2J=&/$";/"$>".!L!"#U."'$)+,/>"(3,$3,40O/##"IN2J=&/$";



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65/73

I5F2:I5F2:J./"$F>","./3(-&./>"'.8NJ./"$F>","./3(-&./>"'.8N192192IrIr !"#O$,!"#O$,250250 CiCi

V%&C^8(3-8,".2).UE",-&./>"'.8N$3,40V%&C^8(3-8,".2).UE",-&./>"'.8N$3,4055 '#-$G&"-&+,/"$'#-$G&"-&+,/"$ JU&C$8#"L$3,40L->"OU.E,V%&C^8(3-8,".2).+2%E#0E"'R02,JU&C$8#"L$3,40L->"OU.E,V%&C^8(3-8,".2).+2%E#0E"'R02,

00..4848 mR/hrmR/hr G"#!E"-&+,J=&/>"OR,+./$0-U."'FE"P$G"#!E"-&+,J=&/>"OR,+./$0-U."'FE"P$ #"B!",/3*.#"B!",/3*.


GAMMA RADIATION LEVELS FOR ONE CURIEGAMMA RADIATION LEVELS FOR ONE CURIE


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OF SOME RADIONUCLIDEOF SOME RADIONUCLIDE

NuclideNuclide NuclideNuclide

ActinumActinum--122122 22..44 IodineIodine--131131 22..22

CesiumCesium--137137 33..33 IridiumIridium--192192 44..88

CobaltCobalt--6060 1313..22 RadiumRadium--226226 88..2525

= R= R--cmcm22h/ hrh/ hr--mCi ormCi or / 10=R/ hr at 1m/ Ci/ 10=R/ hr at 1m/ Ci


5"/-"$",C$8#"L$3,40F01$@2@5"/-"$",C$8#"L$3,40F01$@2@ 11 '#-$ B+,'#-$ B+, 192192IrIr


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5"/-"$",C$#"L$,4F$@2@5"/-"$",C$#"L$,4F$@2@11 '#-$B+,'#-$B+,192192IrIr

!"#O$,

!"#O$,11 CiCi

#0E"'FE"/3(#0E"'FE"/3(1010

==R/ hr atR/ hr at 11m/ Cim/ Ci

44..881010

==00..4848R/ hrR/ hr

192192IrIr !"#O$,!"#O$,250250 CiCi F01$@2@F01$@2@11 '#-$#0E"'#-$#0E"

== 250250aa00..4848 R/hrR/hr== 120120 R/hrR/hr


5"/5"/Inverse square lawInverse square law F01$@2@F01$@2@55 '#-$'#-$


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qq

== 44..88 R/hrR/hr

II11II22

(d(d22))22

==(d(d11))

22

120120 R/ hrR/ hr

II22

((55 m)m)22==

((11 m)m)22


5@JU&C$8#"L$3,40ANA,5"/5@JU&C$8#"L$3,40ANA,5"/44..88 R/hrR/hr #"'CD.#"'CD.00..4848 mR/hrmR/hr


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Transmission Factor =Transmission Factor =II22

00..4848 mR/hrmR/hr

II11

44..88aa10001000 mR/hrmR/hr==

== 00..00010001



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/"$C[+,/3.+3.-$"25"/$3,40/"$C[+,/3.+3.-$"25"/$3,40


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11..'!A"'!A"(Time)(Time)R2"2"#J=&'!A"J./"$F>",".R2"2"#J=&'!A"J./"$F>","./3($3,40JU&.&+2F0146N/3($3,40JU&.&+2F0146N 22..$@2@F",$@2@F",(distance)(distance)R2"2"#+2%EUE",-&.R2"2"#+2%EUE",-&.

/>"'.8N$3,40JU"/F0146N'FE"F01F>"PN&/>"'.8N$3,40JU"/F0146N'FE"F01F>"PN&


33 '$)1+,/>"(3,$3,40'$)1+,/>"(3,$3,40 (Shielding)(Shielding) J./$L0F01P#EJ./$L0F01P#E


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33..'$+,/"(,$,4'$+,/"(,$,4(Shielding)(Shielding)J./$LFP#J./$LFP#

4"#"$GAN'!A"/"$F>",".PN&4"#"$GJ=&!34N64"#"$GAN'!A"/"$F>",".PN&4"#"$GJ=&!34N6(",=.8NF>"'CD.'$)1+,/>"(3,$3,40PN&(",=.8NF>"'CD.'$)1+,/>"(3,$3,40PN& (0-"(0-"+A%#8'.02#OVE./$@N"KOBW,+A%#8'.02#OVE./$@N"KOBW,

'+W/Q:O/##"'+W/Q:O/##"-@/31!'UAW/+./$0--@/31!'UAW/+./$0- .8!-$+..8!-$+.J=&!34N6F01#0PbIN$'5..*>"R"$";


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