CERN Program Library Long Writeup W5013 - CERNLIB ...

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Where • @50 is the block number which defines a primitive solid; • N1,N2,N3 are the sequence numbers of each block; • :5,2 is the dictionary entry number which gives a total subordination to one block; • #60 is the sub-block number which defines the geometric parameters of a solid rectangular parallelepiped; • X,Y,Z are the dimensions of the rectangular parallelepiped; • @302 is the block number for geometric transformation; • #317 is the sub-block number for translation; • DX,DY,DZ are the coefficients of the translation; • @100 is the block number which defines a constructed solid; • :9 is the dictionary entry number for a name associated with the block; • Name is the name of the volume; • #101 is the sub-block number for transformation operation. The rectangular parallelepiped is first defined with the given parameters. Then the translation of coordinates is defined. The translation is necessary since GEANT and SET use origins in different places. Finally, the transformation operation is defined for a constructed solid which in this case is the translation of the coordinates of a primitive solid. The GEANT shapes are converted to SET as follows: SHAPE BOX TRD1 TRD2 TRAP TUBE TUBS CONE CONS SPHE PARA PGON PCON ELTU HYPE GTRA CTUB DEFINITION IN SET rectangular parallelepiped ruled solid between 2 faces ruled solid between 2 faces ruled solid between 2 faces solid of revolution of a face solid of revolution of a face solid of revolution of a face solid of revolution of a face sphere ruled solid between 2 faces first segment ruled solid, other segments copied and rotated, finally boolean union for all the segments solid of revolution of a face solid of linear extrusion of a face not implemented ruled solid between 2 faces solid of revolution and boolean subtraction by 2 halfspaces 3.2 Position Information The position information of a volume is handled by a routine, which writes the coordinates and the rotation matrix. The tree decoding routine transforms the coordinates and the rotation matrix of a volume to the global coordinate system, and then transfers the data to the routine which writes the translation and rotation of a volume into the SET format as follows: @302,N1#301,M1,M2,M3,M4,M5,M6,M7,M8,M9,XC,YC,ZC @100,N2,:9,’Name’#101,!N1(of the shape),!N1 150 GEOM910 – 3
Where • @302 is the block number for geometric transformation; • N1,N2 are the sequence numbers of each block; • #301 is the sub-block number which defines the coefficients of the rotation-translation matrix; • M1...M9 are the coefficients of the rotation matrix; • XC,YC,ZC are the components of the translation vector; • @100 is the block number which defines a constructed solid; • :9 is the dictionary entry number for a name associated with the block; • Name is the name of the volume; • #101 is the sub-block number for transformation operation; • !N1 is the reference to sequence number of the mother volume. The geometric transformation is first defined with the given parameters and then the transformation operation is defined for a constructed solid. The principle of writing divisions into the SET format is equivalent to the case of normal volumes. 3.3 Material and Tree Information The material file is written into a separate file simultaneously with the SET file. It contains information on tracking medium, material and density for each defined volume. The GEANT tree is written into this same file. After the volume name there follows the number of daughters and daughter names. In a case of divided volume, the negative number of divisions is given after the name of the divided volume, and followed by the offset, step and the name of the division instance. An output of a material file of a GEANT example program: GEANT-SET MATERIAL LISTING FILE -------------------------------- Materials in the geometry described in the .SET file: gexam4.set Volume name Tracking media Material Density CALO 1 AIR 1 AIR 0.12000001E-02 CAL1 1 AIR 1 AIR 0.12000001E-02 MOD1 1 AIR 1 AIR 0.12000001E-02 CAL2 1 AIR 1 AIR 0.12000001E-02 MOD2 1 AIR 1 AIR 0.12000001E-02 CAL3 1 AIR 1 AIR 0.12000001E-02 MOD3 1 AIR 1 AIR 0.12000001E-02 EPO1 4 CARBON 4 CARBON 0.22650001E+01 CHA1 6 BRASS 6 BRASS 0.85600004E+01 TUB1 6 BRASS 6 BRASS 0.85600004E+01 GAS1 5 GAS 5 ARG/ISOBU 0.21360000E-02 GEANT TREE ---------- The GEANT tree starting from the given volume CALO 6 CAL1 CAL2 CAL3 EPO1 CHA1 EPO1 CAL1 -64 -0.48000000E+02 0.15000000E+01 MOD1 CAL2 -35 -0.43750000E+02 0.25000000E+01 MOD2 CAL3 -13 -0.24050001E+02 0.37000003E+01 MOD3 CHA1 -40 -0.25000000E+02 0.12500000E+01 TUB1 MOD1 6 SHIL URPL SHIL EPO1 CHA1 EPO1 MOD2 4 SHIL URPL SHIL CHA2 MOD3 2 COPL CHA2 TUB1 1 GAS1 CHA2 -72 -0.23500000E+02 0.65277779E+00 TUB2 TUB2 1 GAS2 ------ end of file ------- GEOM910 – 4 151
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CERN Program Library Long Writeup W
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Chapter 1: Catalog of Geant section
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IOPA500 KINE001 KINE100 KINE199 KIN
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Geant 3.21 GEANT User’s Guide AAA
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The routines made available for GEA
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outines, then you can type the foll
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AAAA Bibliography [1] H.J. Klein an
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2 Event simulation framework The fr
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• after each tracking step along
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GUDIGI GUOUT GTRIGC UGLAST GLAST GU
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Particles JPART Materials JMATE/JTM
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3 Summary of GEANT data records 3.1
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3.4 User applications KEY N I VAR S
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Geant 3.16 GEANT User’s Guide BAS
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SUBROUTINE UGEOM + (’TGT ’,2,
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LQ(JHEAD-1) user link IQ(JHEAD+1) I
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VALUE = GARNDM (DUMMY) DUMMY (REAL)
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Geant 3.16 GEANT User’s Guide CON
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1 Energy binning IDECAD Bin number
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Particle No. Mass(GeV) Charge Life
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¯Ω + ¯Ξ 0 π + 23.60 ¯ΛK + 67
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Geant 3.16 GEANT User’s Guide DRA
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The main drawing routines are: GDRA
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Another feature which is available
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z y x C CHARACTER*4 CHNAMS(5) INTEG
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CALL GDRAWC(’OPAL’,2,0.,10.,10.
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CALL GSATT(’HB’,’FILL’,3) C
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CALL GDRAW(’CAVE’,40.,40.,0.,10
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Figure 16: Example of use of GDSPEC
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CALL GDOPEN(3) CALL GDRAWC(’ALEF
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6 NKVIEW IVIEW JDRAW NKVIEW JV = IB
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SHAD EDGE when HIDE is ON, selects
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1= generation of secondaries enable
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DEEMAX The formula used by GEANT is
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The second problem has been solved
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Geant 3.16 GEANT User’s Guide PHY
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GPHYSI Initialisation of physics pr
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• the mean number of tries is not
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as function of the variable u = Eθ
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GEANT 3.16 GEANT User’s Guide PHY
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where N Z(Z i ) A(A i ) ρ σ Avoga
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Word # PHFN bank (data area, contin
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2 Method If the energy of the radia
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The Auger or Coster-Kronig transiti
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where: n number of energy bins q i
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• Case dielectric → metal. The
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| ⃗ k| = | ⃗ k ′′ | = k =
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Case dielectric → metal In this c
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5 Processes involving Čerenkov pho
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Much of the difficulty in approxima
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CALL GMOLIE (OMEGA,BETA2,DIN*) OMEG
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where λ 0 = ¯h/p Compton waveleng
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2.3 Sampling of the distribution fu
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X 0 is the radiation length. From (
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where we have set Θ=θ/χ α . To
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The variable DCUTE in common /GCCUT
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2.2 Total cross-sections The integr
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For the other charged particles the
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POTI POTIL (REAL) average ionisatio
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where φ(λ) = 1 ∫ c+i∞ exp (u
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Counts 900 800 Landau 700 40 600 20
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Fast simulation for n 3 ≥ 16 If t
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ξ/E Max (hereafter κ) relative im
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ln(∫ σ γ dE/norm.factor) -4 -6
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VALUE = GBFSIG (T,C) GBFSIG calcula
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∆σ σ = { 12 − 15% for T ≤ 1
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T(MeV) C Pb ∆El 0 ∆E l ∆σ l
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1. sample x from 1 1 ln 1 x c x set
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E bind , eV 10 5 10 20 30 40 50 60
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eV). At present the values recommen
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calculated dE dx − dE measured dx
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Figure 43: Stopping powers in Carbo
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esults can be seen in table 2 and 3
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VALUE = GBRSGM (Z,T,BCUT) Z T BCUT
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The functions F i (Z,X,Y) (i = σ,
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where, (a − 1) 1 f(ν) = ( ) 1 ν
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where: Γ = kα 2π [ ɛ = W E 1 1
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NLM DENS CORR IPART (INTEGER) numbe
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Hydrogen (bound) Sodium Copper Hydr
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[25] M. Gavrila. Relativistic l-she
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[78] R.W.Williams. Fundamental Form
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[CONS]). Usually, this is done toge
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Geant 3.16 GEANT User’s Guide TRA
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VECT,SNEXT,SAFETY Compute distance
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VECT,SNEXT,SAFETY Compute distance
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VECT,SNEXT,SAFETY Compute SFIELD,SM
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SUBROUTINE GUSTEP +SEQ,GCKING,GCVOL
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CALL GRKUTA (CHARGE,STEP,VECT,VOUT*
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Geant 3.16 GEANT User’s Guide XIN
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Clicking then on the right button o
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YMED R “ Center Y coordinate ”
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HIDE is ON, the detector can be exp
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e drawn. NAMNUM contain the arrays
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following levels (red arrows) and o
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Draw a polyline of ’npoint’ poi
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a dynamical 3-D analysis of the sim
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1. position the cursor at (uz0,vz0)
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CHUSET C “User set identifier”
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Set current attribute. 4.8 SSETVA [
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CALL GDCOL(-abs(icol)) 4.12 LWID lw
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5 GEANT/GEOMETRY Geometry commands.
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Print matrixes’ specifications. 5
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6 GEANT/CREATE It creates volumes o
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YES NO 6.7 SCONS name numed inrdw o
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7 GEANT/CONTROL Control commands. 7
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To change lout in /GCUNIT/ Note: un
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IPART I “Particle number” NAPAR
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8.5 CDIR [ chpath chopt ] CHPATH C
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9 GEANT/FZ ZEBRA/FZ commands 9.1 FZ
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Check the structure of one or more
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FACTL R “Scale factor for SL” D
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12 GEANT/PHYSICS Commands to set ph
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Possible IDRAY values are: 0 1 2 To
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12.14 PAIR [ ipair ] IPAIR C “Fla
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PPCUTM R “Cut for e+e- pairs by m
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LGET_15 C “user word” LGET_16 C
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13.6 GEOM [ lgeom˙1 lgeom˙2 lgeom
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LSTAT_7 C “user word” LSTAT_8 C
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XINT Bibliography [1] R.Brun and P.
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This common contains the threshold
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ITR3D track being scanned (used tog
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NCLAS1 NCLAS2 NCLAS3 IHOLE CGXMIN C
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* PARAMETER (MAXJMP=30) COMMON/GCJU
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GYMAX GZMIN GZMAX GXXXX GYYYY GZZZZ
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DENS density of current material in
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RADDEG radiants to degrees conversi
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PCUTNE parameterisation threshold f
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SMULS SOMULS STMULS DPHYS3 ILABS SL
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NTETA TETMIN TETMAX MODTET number o
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S2 S3 SS1 SS2 SS3 LEP IPORLI ISUBLI
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CFIELD constant for field step eval
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NEXT 1 particle has reached the bou
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C COMMON/GCVOL2/NLEVE2,NAMES2(15),N
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STEP PLIN PLOG BE2 PLASM TRNSMA BOS
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C ESHELL - Shells potentials in eV
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Geant 3.11 GEANT User’s Guide ZZZ
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GFKINE KINE001, KINE100, KINE199 GF
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GPSTAT GEOM700 GPTMED CONS001, CONS
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ZZZZ Bibliography [1] T.Sjöstrand
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CDRSGA, 297 CGMULO, 221 CHANGEWK, 3
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GEANT/DRAWING/KHITS, 372 GEANT/DRAW
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GPART, 13, 46, 61, 293 GPCXYZ, 40,
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PATCHY, 278 PCUTS, 399 PDIGI, 389 P
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