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

5 INPUT INSTRUCTIONS FOR THE COMPUTER CODE GOSIA5.1 ORGANIZATIONInput, execution and control of the code GOSIA is achieved by specifying a given sequence of option commands.These option commands are activated using the input format OP,– where – designates the fourcharacteralphanumeric name of the option command. Some options are used for input or selection of inputneeded for specific tasks, while other options execute appropriate modules of the code.The code GOSIA can operate in either of two mutually exclusive modes. The first, activated by theoption OP,COUL, performs the calculation of Coulomb excitation probabilities and γ-ray yields for a fixedset of the matrix elements. No fitting of matrix elements to experimental data is performed if OP,COULhas been selected. The other mode, activated by the command OP,GOSI, should be used if a least-squaresfit of matrix elements to experimental data is desired. The user is free to use any other option commandsin conjunction with either the OP,COUL or the OP,GOSI commands consistent with an obvious logic. Forexample, the code cannot calculate Coulomb excitation amplitudes if the level scheme is not defined, also itcannot execute the fit-related commands if OP,COUL has been selected. The input to the option commandsOP,COUL and OP,GOSI contains suboptions for which the prefix OP, is not appended to the name.A summary of all available options is given below. Detailed descriptions of each option and suboptioncommand are given in alphabetical order in the subsection of this chapter listed next to the name of eachoption. Details of the file manipulation procedures are given in Chapter 7. The names of the optioncommands are truncated to four characters. Full, self-explanatory names are given in parentheses in thefollowing description.CONT (CONTROL) (5.3):Suboption of OP,COUL and OP,GOSI which is used to control and select various optional features ofthe code for both execution and output. This option can be omitted in which case default parameterswill be used.–––––OP,CORR (CORRECT) (5.4):Execution option to modify the experimental data to correct for the difference between the integratedyield calculations and the point values used for calculation of the Coulomb excitation cross sectionsand γ-ray yields, as described in detail in 4.4.–––––OP,COUL (COULEX) (5.5):Activates the simple excitation/deexcitation mode. No fit of matrix elements to the data is made withthis option in contrast to OP,GOSI. Consequently, the appreciable input required for the fit procedurecan be skipped. OP,COUL contains the following suboptions:–––––LEVE(Section 5.13)ME(Section 5.15)EXPTSection 5.8)CONT(Section 5.3)58