LISE⁺⁺ version 5.8

Contents:

1. version 5.8

1.1. Auto mode for the abrasion-ablation model
1.2. On-line LISE-analysis of experimental plots
1.3. Calculation of the wedge thickness

3. LISE & Internet - version 5.6

1. version 5.8

1.1 Auto mode for the abrasion-ablation model

As it was shown in version 5.4 there are various recommended meanings of Abrasion-Ablation model options depending on the prefragment mass. However it is inconvenient to enter values each time when changing the projectile-target combination. In this connection, in the new version the opportunity of automatic input of options was entered depending on the prefragment mass. An opportunity of manual input options is kept, too. The dialog Settings of prefragment is shown in Fig.1, where the choice of auto or manual modes is outlined by a red rectangle. The tunneling, choice of state density, unbound nuclei and geometrical corrections blocks are not accessible in the case of the automatic mode. The program automatically puts values defined by the user in the dialog Settings of AUTO mode (see Fig.2).
 The parameter dR has been fitted by a parabolic dependence on the value (A _pf)^1/3, so for mass A=200 the value dR is equal to 6 fm, for mass A=2 accordingly it is equal to 0 fm (two points A=40 and 58 have been used also, see the documentation of version 5.4).
Further the improvement of automatic adjustments for excitation energy and state density is supposed.

1.2. On-line LISE analysis of experimental plots

Into the concept of the program LISE development enters not only input of new tools (new models of reaction mechanisms, etc.) able to help physicists in the prediction of products' outputs, but also further development of the mechanism of experimental data analysis. In the new version the apparatus for work with experimental spectra obtained by the program BI was developed. The analysis of experimental two-dimensional peaks can be divided into 4 stages:

The first stage is reading an experimental spectrum by the program BI. An example of such a spectrum is shown in Fig.4-1. This spectrum is obtained with the spectrometer A1900 (NSCL MSU) in the reaction ¹⁸O (120AMeV) + Be (this experiment is discussed in more detail in the chapter Version 5.5 ).

The second stage is the determination of the program-BI parameters for the analysis of the initial spectrum, and the analysis itself. The program creates a text file with the found peaks and an output spectrum with the found peaks in the format of the initial spectrum (Fig.4-2).

The third stage is the new stage, which helps the user to avoid unnecessary peaks and also to initialize good peaks. After search of peaks by clicking on the button Plot in the dialog BI the user gets an output spectrum (Fig.4-3), where the determined peaks are shown by ellipses with serial numbers. The semi-axes of ellipses by default are equal to three standard deviations (s ) found by the program BI. However, the user can redefine their size pressing the icon  (see Fig.3). The double clicking of the right button of the mouse on a peak allows editing this peak. The user can switch off the peak using the checkbox Available and/or give a name (see Fig.5). The new spectrum obtained after selection from the previous spectrum (Fig.4-3) is shown in Fig.4-4.

The fourth stage is recording selected peaks on a disk (clicking the icon ) and reading them by another program (for example MS Excel).

Within 10 minutes the user gets the table with found selected peaks with the characteristics (average values, standard deviations, area) that can be used for the further analysis (cross sections, momentum distributions, calibrations, etc.).

1.3. Calculation of the Wedge thickness

The opportunity of calculation of a material thickness appropriate for an initial kinetic energy and an energy after this material was specially entered in the Physical Calculator earlier. However, as experience has shown, some users have difficulties when calculating the wedge thickness for known input and output energies. In this connection, the opportunity to calculate the wedge thickness for the defined fragment proceeding from the values of the magnetic rigidities Br 1 and Br 2 has been created in the dialog Degrader in Dispersive Focal Plane .

To calculate the wedge thickness it is necessary beforehand to input the values of the magnetic rigidities (items 1 and 2 in Fig.6) and to press afterwards on the key Calculate thickness in the dialog Degrader in Dispersive Focal Plane (item 3 in Fig.6).

2. LISE & Excel - version 5.7

The opportunity of using the LISE huge computing luggage by other programs has appeared in the new version of the LISE code. Some subroutines were replaced from the module LISE.EXE in separate libraries (*.DLL), and can be executed from these libraries by other programs. The modules of calculation of energy losses in matter, range in materials, stragglings of range and energy losses, and also empirical parameterization of cross sections (EPAX 2.15) can now be used for calculations in sheets of MS Excel. It is necessary to notice, that such opportunity exists only for the versions of the program LISE installed in a standard way, instead of taken from the open version directory. New libraries will be placed by the install program in the directory windows/system (OS Windows 98/Me) or windows/system32 (OS Windows NT/2000) in the case of a standard way installation. In the program LISE package there is the file LISE.XLS (version MS Excel 8 or higher), which is placed in the root LISE directory and for which the icon from the starting menu of the program LISE is created. This file contains connections (via Visual Basic) with libraries of the program LISE (see Fig.7). Also this file contains one sheet with examples of all functions available in these libraries. At loading the given file the window will appear with a question: to include/avoid macro-functions, on what you should include macros, if you want to use the LISE luggage.

If you want to use functions of the program LISE in other Excel files, the file LISE.XLS should be loaded previously. Then the user should execute the Excel command Insert function (shift F3), and choose a function necessary for you from the list of functions determined by the user (for example lise.xls!EnergyLossInMatter ).

With use of these libraries the user can create sheets with various amount of detectors (reminder: in the program the maximum quantity of detectors is equal to 7), to use the tables for calibrations, etc., using thus all the power of Excel. An example of such a file is found at the address: http://http:"//lise.nscl.msu.edu/5_8/lise_example.xls. Only do not forget to earlier load the file LISE.XLS.
 

3. LISE & Internet - version 5.6

The program has received in the new version an access to databases through the Internet (databases of Isomers and TOI), and also utilities of automatic informing of the new version of the program and connection with sites of the LISE program.

3.1. Access to databases

The LISE program has the built-in database (Audi & Wapstra 95) of nuclide characteristics (separation energies, half-lives etc.). However the user frequently requires more extensive information during the preparation of experiment and its realization. Supplement of the program LISE by other databases can essentially change the size of the program. Thus as the majority of users of the program have access to the Internet, it was decided to approach the appropriate databases directly by the program.

3.1.1. Isomer database

Nuclei having isomeric states are marked on the table of nuclides in the program by green rectangle in the left bottom corner (see Fig.8, item A). The information about isomeric states is taken from the database located on the site of the LISE spectrometer (www.ganil.fr/LISE). This database has been created by Dr.Jean-Michel Daugas. The user gets a window of statistics clicking by the right key of the mouse on the isotope rectangle on the table of the nuclides. If the isotope has an isomeric state, in this window the button Isomer (see Fig.8, item B) will appear. Pressing this button, the information from the GANIL site will be loaded into default browser (Fig.9). The information about isomers is accessible for isotopes with mass less than 84.

3.1.2. TOI

Pressing on the button WWW TOI (see Fig.8, item C) in the statistics window, the user will get the information on the given isotope from the database TOI located on the site in Sweden (see Fig.10).

3.2. Check to the new version

An access to the Internet utilities of the program LISE is realized through the menu Help (see Fig.11). The user can in the dialog Check to the new version of the code (Fig.12):

• choose a web-site to check presence of the new version, and also to see the documentation about changes of the program;
• choose a ftp-server to download the new version of the program;
• establish a time interval when the program automatically checks presence of the new version;
• see documentation about changes of the program.

Unfortunately one issue has not been yet solved - at which the program undergoes a crash. It is connected with the absence of access to the Internet when the code checks the new version. The Internet access block was realized with the compiler Builder 5.0, whereas the program is compiled by Borland 5.02 OWL. But in any case the program will replace the date of check and at the subsequent start the program will be loaded without automatic check to the new version.

3.3. Mail and registration from the code

From the menu Help the user may (see Fig.11)

• Send an e-mail with remarks or problems to the authors of the code;
• Register on the LISE sites to get information about new versions;
• Visit the LISE sites at East Lansing or Dubna.

4. version 5.5

4.1. Brho Scanning Plot

A new utility to help the experimenter in the analysis of the experimental information was developed in the new version. Frequently in experiments there is a necessity of scanning of reaction-products outputs depending on magnetic rigidity. The given procedure will be carried out for study of momentum distribution and production cross sections, and also for obtaining spectrometer settings for an optimum output of the fragment of interest (maximal output, best relation of setting fragment to background, etc.). Also the scanning represents the large interest from the point of view of comparison of the calculations done within the LISE program with the experimental data, which in turn allows modifying the parameters of models in the program for the best agreement with experiment. 

Fig.13. The menu Calculations and  new utility Brho Scanning	Fig.14. The dialog Brho Scanning .

The user has access to the utility Brho scanning through the menu Calculation (see Fig.13). A fragment of interest and range of scanning are determined in the dialog Brho scanning (see Fig.14). The number of points for scanning is the same as for the optimum thickness target calculation plot and can be changed through the dialog Preferences . After creation of the Brho scanning plot (Fig.15), the calculated distribution can be kept in a file  and is used for the further analysis.

4.1.1. Comparison of calculations with experimental data

New possibilities of the code: Brho scanning and On-line LISE analysis of experimental plots (version 5.8) were used recently in the analysis of experimental data obtained in the experiment at NSCL with the spectrometer A1900 using the reaction ¹⁸O(120 AMeV)+Be(1166 mg/cm²). Experimental spectra were analyzed by the program BI, after some unnecessary peaks were eliminated in the LISE program, and the resulting files were transmitted to Excel and later after an analysis to Origin. Eighteen Bρ scanning files for different momentum-distribution models and different fragment settings were also created by the LISE code and transferred to Origin. You may see the result plots in Fig.16. Using the new utilities accelerates the analysis by a factor of ten! The complete analysis took less than two working days of one physicist!!!

4.2. Options files

All LISE in-built setting after clicking the button Make it default are saved in the file LISE.INI. However, from experience sometimes physicists work on one computer with the LISE code but with different settings. In the new version there is a possibility to create an option file of options, which is found in the directory OPTIONS. The user should use the menu File in order to save or to load private settings in/from the option file.

4.3. Print of the dialogs "Physical Calculator" and "Goodies"

Opportunity of printing the dialogs Physical calculator and Goodies directly from the program has now been realized. The button "Print" existed since these dialogues were created, but print of dialogs was not possible, which often caused questions and inconvenience to the LISE users. We are glad to inform, that this lack is now corrected.