CERN Program Library Long Writeup W5013 - CERNLIB ...

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* CUTGAM=100.00 keV CUTELE=100.00 keV CUTNEU=100.00 keV * * CUTHAD=100.00 keV CUTMUO= 1.00 MeV * * BCUTE =100.00 keV BCUTM =100.00 keV * * DCUTE =100.00 keV DCUTM =100.00 keV PPCUTM= 10.00 MeV * * IPAIR = 1. ICOMP = 1. IPHOT = 1. * * IPFIS = 1. IDRAY = 1. IANNI = 1. * * IBREM = 1. IHADR = 1. IMUNU = 1. * * IDCAY = 1. ILOSS = 1. IMULS = 1. * * IRAYL = 0. ILABS = 0. ISYNC = 0. * * ISTRA = 0. * * * * * * Special TPAR for TMED 5 GAS * * ------------------------- * * CUTGAM=100.00 keV CUTELE=100.00 keV CUTNEU=100.00 keV * * CUTHAD=100.00 keV CUTMUO= 1.00 MeV * * BCUTE =100.00 keV BCUTM =100.00 keV * * DCUTE = 10.00 GeV DCUTM =100.00 keV PPCUTM= 10.00 MeV * * IPAIR = 1. ICOMP = 1. IPHOT = 1. * * IPFIS = 1. IDRAY = 1. IANNI = 1. * * IBREM = 1. IHADR = 1. IMUNU = 1. * * IDCAY = 1. ILOSS = 1. IMULS = 1. * * IRAYL = 0. ILABS = 0. ISYNC = 0. * * ISTRA = 1. * * * * * ************************************************************ The meaning of the printed values is described in the documentation of the commons /GCCUTS/ and /GCPHYS/ in [BASE030]. Different values of the parameters can be assigned by the user to each tracking medium (see [BASE100]). The parameter definition in GEANT proceeds as follows: 1. a default set of global values of the parameters is defined for all tracking media by the routine GINIT; 2. the default values can be changed by the user via the data records read by the routine GFFGO. A summary of all valid data records is given in [BASE040]; 3. after having defined tracking media and materials, the user can redefine the parameters for each medium via the routine GSTPAR [CONS210]; 4. if the data structures are read from an external file (see IOPA section), all the parameters are taken from this file. In this case the user can still modify them, but this should be done before calling the routine GPHYSI. 2 Compute cross-section and energy loss tables GPHYSI is the steering routine to compute the cross-section and energy loss tables for all materials used as tracking media. GPHYSI builds and fills the JMATE data structure described in [CONS199]. Here, we give the flow chart of this process. The description of the specialised routines can be found in the rest of the section PHYS. Note: if several tracking media are using the same material (for instance a calorimeter and a chamber support can be both in steel) the energy cuts must be the same. If this is not possible, the user must define materials with different numbers. PHYS100 – 2 208
GPHYSI Initialisation of physics processes. This routine should be called by the user before the tracking starts, but after all the material, mechanism flags and energy cuts have been defined. GPHYSI should also be called whenever a new initialisation data structure is read from disk. GRNDMQ Initialises the value of the seeds of the random number generator. See [BASE420] for more information GEVKEV Routine to format energy values for printout. See [BASE410] for more details. GPHINI Initialisation of the constants for photoelectric effect (see [PHYS230]). Loop on tracking media GPHXSI GPROBI GMOLI Initialisation of the cross section coefficients for the photoelectric effect in a tracking medium, see [PHYS230]. Initialisation of constants for various physical effects. Initialises constants for Molière scattering, see [PHYS325]. Loop on energy bins GDRELA Initialises the ionisation energy loss tables dE/dx for protons, µ and e + , e − , see [PHYS430]. GDRELP Calculates ionisation energy loss for protons, see [PHYS430]. GDRELM Calculates ionisation energy loss for µ, see [PHYS430]. GDRELE Calculates ionisation energy loss for e − /e + , see [PHYS330]. GBRELA Adds the contribution of bremsstrahlung to continuous energy loss tables for protons, µ and e − /e + , see [PHYS440]. GPRELA Adds the contribution of direct pair production and µ-nucleus interactions to the µ continuous energy loss tables, see [PHYS450]. GPHOTI Calculates the cross section for photoelectric effect, see [PHYS230]. GRAYLI Initialises the tables of cross sections for the Rayleigh effect, see [PHYS250]. GANNII Initialises the cross section for positron annihilation, see [PHYS350]. GCOMPI Initialises the cross section tables for Compton effect, see [PHYS220]. GBRSGA Initialises the cross section tables for discrete bremsstrahlung of e − /e + and µ, see [PHYS340], [PHYS440]. GPRSGA Initialises cross section tables for pair production by photons and direct pair production by muons, see [PHYS210], [PHYS450]. GDRSGA Initialises the cross section tables for delta rays production by µ and electrons, see [PHYS330], [PHYS430]. GMUNUI Initialises the cross section tables for µ-nucleus interactions, see [PHYS460]. GPFISI Initialises the cross section tables for photo-fission and photoabsorption, see [PHYS240]. End of loop on energy bins GRANGI GCOEFF Calculates the stopping range integrating the dE/dx tables, see [PHYS010]. Calculation of the coefficients of the interpolating parabolas for the range tables, see [PHYS010]. 209 PHYS100 – 3
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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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x1xxxx 1xxxxx add the text EVENT NR
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DRAW Bibliography [1] R.Bock et al.
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2 Volumes with contents A volume ca
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The user can position a volume thro
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0 1 2 1 0 1 0 1 2 3 4 5 6 7 Figure
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2 Divisions along arbitrary axis As
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9.BL2 half-length along x of the si
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1.DZ half-length along the z axis;
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ECAL BOX specifications 18/11/93 EC
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ECAL SPHE specifications 18/11/93 E
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Geant 3.16 GEANT User’s Guide GEO
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• if the CHONLY flag is set to MA
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y y x x y y y y z z x x z z y y x x
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CAVE PAR1 specifications 20/10/94 y
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Dynamic ordering The list of neighb
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are represented by their values. A
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Where • @302 is the block number
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GEOM Bibliography [1] French Standa
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Geant 3.16 GEANT User’s Guide HIT
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Page 223 and 224: where N Z(Z i ) A(A i ) ρ σ Avoga
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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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Geant 3.16 GEANT User’s Guide PHY
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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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