coulomb excitation data analysis codes; gosia 2007 - Physics and ...

Figure 9: A rectangular particle detector has a non-azimuthally symmetric shape in the θ, φ space of projectilescattering angle. This shape must be defined by entering a number (NFI) of azimuthal angular ranges. Inthe hatched region, NFI =2ranges must be entered specifying the two active regions. The solid linesrepresent θ meshpoints, while the dashed lines indicate θ subdivisions. The rapid variation in active φ rangein the hatched region necessitates input of the active ranges of ∆φ at each subdivision specifying each of thetwo active detection regions shown hatched.θ 1 , θ 2 , ...θ NT Projectile scattering angles (degrees) in the laboratory frame, used as meshpoints. Note,if the target is detected then the projectile scattering angle corresponding to the detected recoilingtarget angle must be input with a negative sign to set the flag specifying the target nucleus detected.The input angles must correspond to the detected particle angular range which exceeds or at leastequals the range of angles subtended by the detector to obtain reliable Lagrange interpolation. Do notinput these angles for the circular detector option.NFIThe number of φ ranges for each θ i meshpoint needed to describe the θ(φ) dependence. OmitNFI input if either the circular detector option or axial symmetry is specified.φ 1 , φ 2 , ... NFI pairs of φ angles describing the φ range for given θ i .Omitφ input if either the circulardetector option or axial symmetry is specified.The above two records must be input for each θ meshpoint specified. NFI should not exceed 4. Inmost cases NFI =1, then the pair of φ angles simply specifies the lower and upper f limits for a given θmeshpoint. However, for some geometries, such as for rectangular shaped detectors, it is necessary to includemore than one φ range for some θ values. For example, a rectangular detector placed with its normal at 45 ◦to the incident beam has (θ, φ) contours shown in Figure 9:This ends the input required to calculate the γ-ray yields integrated over azimuthal angle φ at the specifiedset of meshpoints. This part of input must be repeated for all experiments defined in EXPT.The second stage of the input is required for the integration and once again has to be entered for allexperiments:NP Number of stopping powers to be input, 3 ≤ NP ≤ 20. If NP =0then the stopping power tableis taken from the previous experiment and the following input of energy and dE/dx values can beomitted forthiscase. Thisisusefulwhereexperimentsdiffer only with regard to range of scatteringangles or bombarding energies.E 1 , E 2 ,...E NPThe energy meshpoints (in MeV) at which values of the stopping power are to be input.80