Interview Questions.

Question 1. What Is Radware?

Answer :

RadWare is a effective, consumer-pleasant software package for interactive graphical analysis of gamma-ray accident statistics. It is used by many physicists round the world as they study the structure of the atomic nucleus and analyze the outcomes in their experiments.

Question 2. What Programs Come In The Radware Package?

Answer :

A few of the extra typically-used RadWare packages are:

gf3, a popular spectrum manipulation, becoming and analysis software (for one-dimensional spectra).

Escl8r, a totally powerful application for analyzing, decoding and becoming gamma-gamma coincidence matrices (i.E. -dimensional spectra) and deducing degree schemes of excited states of nuclei.

Levit8r and 4dg8r, three- and 4-dimensional variations of escl8r. These programs are gear for analyzing triple-gamma and quadruple-gamma coincidences, respectively. To come up with some concept of the portions of information worried, 4dg8r can examine hypercubes of as much as 40 billion channels, piece-wise compressed on disk to take a space of everywhere from 200MB to several tens of GB.

Each of the above packages has as a minimum two variations with different user interfaces; gf3, xmgf3 and gf3x; escl8r and xmesc; levit8r and xmlev; and 4dg8r and xm4dg.

Other packages are: 4play, addmat, algndiag, branch, calib_ascii, combine, divide, dixie_gls, drawstr_ps, effit, encal, power, escl8r, ex_diff, foldout, gls, gls_conv, incub8r, legft, lufwhm, make4cub, pedit, plot, plot2ps, pro3d, pro4d, pslice, rdm, rdmfit, sdgen, split4cub, slice, Source, spec_ascii, statft, subbgm2, subbgmat, symmat, spread, unix2unix, vms2unix, win2tab and xmgls.

A partial listing of the files included within the RadWare distribution is given right here. There are masses of demo*, *.Hlp and *.Txt documents which you may want to peruse. All the command-driven packages have internal assist available; typing HELP from inside a software will generally convey at the least a hint of what you could attempt.

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Question 3. Where Do I Get Radware?

Answer :

You can get the present day variations of RadWare (currently rw99) for unix and VMS thru nameless ftp. Just follow the hyperlinks given right here. Or you may just ftp to radware.Phy.Ornl.Gov, go browsing as consumer ftp, and cd to pub/radware/unix or pub/radware/vms. Then get README and observe the instructions therein.

Question four. How Do I Install It?

Answer :

Follow the instructions given in the README files. You can get them here:

README document for unix

README file for VMS

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Question five. How Do I Upgrade From An Earlier Release?

Answer :

Just reinstall the whole thing as if it become the primary time. You may additionally need to preserve some of your vintage files; as an example, your vintage Makefile and the .PAR or .H files.

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Question 6. How Do I Use Gf3?

Answer :

Here is a gf3 help record (in html).

Question 7. How Do I Exit?

Answer :

Use the ST command.

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Question eight. How Do I Make An Energy Calibration (.Aca/.Cal) File?

Answer :

See the above instructions for making .Sto and .Sin files with gf3 and Source, after which run the program encal. Alternatively, in case you understand the strength calibration coefficients, you may create an ASCII model of the .Cal file, an .Aca record, being certain to apply the suitable formatting of the fields. You can use a replica of demo/demo.Aca as a place to begin.

Question nine. How Do I Make A Lookup Table (.Tab) File?

Answer :

The answer to this depends on what you need the .Tab file for.

For incub8r / levit8r, or 4play / 4dg8r, where you want a lookup-desk that does a probably non-linear mapping of ADC channels (for the facts on tape) to (hyper)dice channels, then the handiest solution is to apply this system lufwhm. You will need to have a few concept of the variety of ADC channels that you want to encompass on your cube. If you wish to apply nonlinear profits, you must additionally have a few idea of ways the width (FWHM) of the peaks varies with energy; you will need to specify this in terms of parameters like the ones used to define the beginning width in gf3, see gf3.Hlp or the escl8r/levit8r NIM paper for information. If you do no longer want to apply nonlinear gains, you may genuinely input 

1, zero, zero

because the FWHM parameters, to pretend that you have a steady FWHM of one channel.

Lookup-desk files can be used for different purposes, however; for example, they're very beneficial in scanning tapes for setting gates for your raw Ge energies to select sure response merchandise or bands for selective evaluation. It turned into for this software that the .Tab record format became first evolved. They can be without problems created in gf3 with the aid of using the LU and WI commands. You also can display the home windows in any .Tab file, together with those from lufwhm, by means of the usage of the DW command.

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Question 10. How Do I Use Escl8r/levit8r/4dg8r?

Answer :

Here are html-ised versions of my NIM papers on 

ESCL8R and LEVIT8R: Software for interactive graphical evaluation of HPGe accident records sets (D.C. Radford, Nucl. Instr. Meth. A361(1995)297)  and 

Background subtraction from in-beam HPGe twist of fate facts sets (D.C. Radford, Nucl. Instr. Meth. A361(1995)306)

Question 11. How Do I Make A Background Spectrum For Escl8r?

Answer :

Use gf3 and examine within the projection. Then use the BG command (car BackGround) to create a lower back floor spectrum under the peaks. Or use SC (Set Counts) to attract a history spectrum by using hand, by way of cutting off the peaks. When you are completed, write the modified spectrum out as the historical past spectrum. I normally leave the X-rays in as background. I additionally every so often put in (n, n' gamma) peaks/shoulders, though this is not essential mainly for a first stab.

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Question 12. Are The Spectra Corrected For Efficiency?

Answer :

Escl8r and levit8r can write gf3-fashion .Spe documents. These spectra aren't corrected for the efficiency. You can correct for efficiency in gf3 with the DE command. The spectra as displayed in escl8r / levit8r aren't corrected for performance, both; rather, the calculated spectrum has the efficiency built into it.

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Question thirteen. Why Can't I See The Gammas I Added To The Top Of My Level Scheme?

Answer :

When you keep adding stages and gammas into the extent scheme window, the extent scheme will finally go off the top of the level scheme portraits window, and you may not be able to see the top of the extent scheme. When this takes place, you need to apply the RD1 command, or choose "redraw entire level scheme" from the show menu. It will recalculate the level scheme limits and redraw.

Question 14. How Do I Make A Background Spectrum For Levit8r?

Answer :

First create a 1D projection from the dice using pro3d. Then, in gf3, divide the projection with the "compression spectrum" width.Spe from lufwhm, and create a historical past spectrum the use of BG or SC in gf3, as described above for escl8r. Finally, multiply this history spectrum with width.Spe, which offers the very last history spectrum that must be used as enter to levit8r. Save this spectrum with the WS command.

Question 15. How Do I Use The E2-better Background Subtraction In Escl8r?

Answer :

To employ the E2-stronger heritage, you need to have the authentic symmetrized matrix. Call up gf3, read in the overall projection, and use the SL and WI commands to create a .Win document for slice, containing one or extra wide gates on the E2-bump area of the spectrum. Depending on the nucleus, that is typically within the region of one.1 to 1.6 MeV, however you ought to also be guided by way of the found E2-bump issues on your esc l8r gates. You don't want to worry about small peaks inside the gate(s), but try to exclude big peaks.

Then go out from gf3, and use slice to take an x-projected gate at the matrix, summing all of the home windows for your .Win document. Keep the .Win report for use later in escl8r. In gf3 once more, read in the summed gate and draw a history underneath it with the BG or SC instructions, just as you probably did for the full projection. Save this background spectrum.

Now in escl8r, use the CB (Change 2D Background) command to put in the new heritage, as within the following example:

        Change historical past? (Y/N)y

        Use improved heritage from E2-bump gates? (Y/N)y

         Total projection spectrum document name = ?Hfs

            E2 projection spectrum document call = ?Hfe2

         Total background spectrum record name = ?Hfb

            E2 history spectrum document call = ?Hfe2b

         Default cost for element 1 is    10.43896

         Factor 1 = ? (rtn for default)

         E2 gate record = ? (default .EXT = .Win)hfe2

         Default cost for issue 2 is    61194.43

         Factor 2 = ? (rtn for default)

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